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Journal articles on the topic 'Binarité'

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Published: 4 June 2021
Last updated: 2 February 2022

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1

Elmiger, Daniel. "Binarité du genre grammatical – binarité des écritures ?" Mots, no. 113 (March 9, 2017): 37–52. http://dx.doi.org/10.4000/mots.22624.

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2

Massacrier, Christel, and Jean-Jacques Rassial. "De la déconstruction du genre au posthumain: quels enjeux pour la psychanalyse?" Revista Latinoamericana de Psicopatologia Fundamental 22, no. 2 (June 2019): 314–32. http://dx.doi.org/10.1590/1415-4714.2019v22n2p314.9.

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Nous nous proposons de revisiter le portrait traditionnel des personnes transsexuelles établi dans les années 1950: conviction d’être “dans le mauvais corps”, victime d’une “erreur de la nature”, demande vitale de réassignation à tout prix pour renaître dans son “vrai corps”. Nous tâcherons de montrer que ce discours ne reflétait pas alors la réalité de la souffrance et du vécu de la majorité des patients et de suivre son évolution quand la parole s’est libérée, en particulier avec la naissance du mouvement transgenre. Mais nous verrons également comment au-delà de la déconstruction de la binarité homme-femme se profile la déconstruction de toutes les binarités, toutes les lignes de séparation entre espèces: homme/femme, mais aussi homme/animal, et au-delà homme/machine, vivant/non-vivant, ce qui ouvre directement sur un monde posthumain.
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3

Medico, Denise. "Genres, subjectivités et corps au-delà de la binarité." Filigrane: Écoutes psychothérapiques 28, no. 1 (2019): 57. http://dx.doi.org/10.7202/1064597ar.

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4

Berlan, Françoise. "Principe d'équivalence et binarité dans la Harangue d'Ulrich Gallet à Picrochole." L Information Grammaticale 41, no. 1 (1989): 32–38. http://dx.doi.org/10.3406/igram.1989.2005.

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5

Chaaben, Mohamed. "Le sexe neutre et le paradigme de la binarité des sexes." Les Annales de droit, no. 11 (October 16, 2017): 87–106. http://dx.doi.org/10.4000/add.524.

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6

Poirier, F., A. Condat, L. Laufer, O. Rosenblum, and D. Cohen. "Non-binarité et transidentités à l’adolescence : une revue de la littérature." Neuropsychiatrie de l'Enfance et de l'Adolescence 67, no. 5-6 (September 2019): 268–85. http://dx.doi.org/10.1016/j.neurenf.2018.08.004.

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7

Ginestet, N., and J. M. Carquillat. "Contribution à l'étude de la binarité des étoiles de type Am." Astronomy and Astrophysics Supplement Series 130, no. 3 (June 1998): 415–19. http://dx.doi.org/10.1051/aas:1998421.

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8

Piccand, Laura. "« A fairly typical boy », « a fairly typical girl »." Emulations - Revue de sciences sociales, no. 15 (September 7, 2018): 87–102. http://dx.doi.org/10.14428/emulations.015.004.

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Les stades dits de Tanner sont une série de photographies permettant d’évaluer le développement pubertaire des filles et des garçons. Utilisés dans la clinique et la recherche médicales contemporaines, leur histoire remonte aux années 1950. Cet article propose de revenir sur le contexte de production de cet artefact et d’interroger la façon dont il est partie prenante de la construction socio-historique de la binarité du sexe dit biologique. La puberté comme objet scientifique et médical est en effet un lieu crucial de production, de reproduction et de reconfiguration du genre.
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9

Tomc, Sandra, and Sophie Bailly. "Motherhood between Tradition and Modernity: Transmission and Transgression of the Gender Identities in the Family Interactions." L’Entre-deux et l’Imaginaire, no. 37 (June 30, 2016): 51–66. http://dx.doi.org/10.35562/iris.1382.

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Cet article examine comment, par leur discours, les femmes se construisent comme mère, dans leurs interactions avec leurs enfants adolescent-e-s, occasionnellement avec leurs maris, contribuant ainsi à la reproduction sociale des stéréotypes de masculinité et de féminité ou, au contraire, de quelle façon elles rompent avec la tradition et proposent des modèles alternatifs. Acceptent-elles ou non leur héritage symbolique en matière de genre ? En voulant la reproduire, comment réinvestissent-elles la dimension genrée dans un contexte d’interactions verbales avec leurs adolescent-e-s, les renvoyant ou pas à leurs « origines » culturelles ? Les mères dépassent-elles le modèle de binarité des sexes traditionnel pour parvenir à un modèle agentif ? À travers le continuum de normativité et d’agentivité, l’entre-deux prend tout son sens : en quoi l’imaginaire linguistique constitue-t-il un espace à construire, un « à travers » ?
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10

Tomc, Sandra, and Sophie Bailly. "Motherhood between Tradition and Modernity: Transmission and Transgression of the Gender Identities in the Family Interactions." L’Entre-deux et l’Imaginaire, no. 37 (June 30, 2016): 51–66. http://dx.doi.org/10.35562/iris.1382.

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Cet article examine comment, par leur discours, les femmes se construisent comme mère, dans leurs interactions avec leurs enfants adolescent-e-s, occasionnellement avec leurs maris, contribuant ainsi à la reproduction sociale des stéréotypes de masculinité et de féminité ou, au contraire, de quelle façon elles rompent avec la tradition et proposent des modèles alternatifs. Acceptent-elles ou non leur héritage symbolique en matière de genre ? En voulant la reproduire, comment réinvestissent-elles la dimension genrée dans un contexte d’interactions verbales avec leurs adolescent-e-s, les renvoyant ou pas à leurs « origines » culturelles ? Les mères dépassent-elles le modèle de binarité des sexes traditionnel pour parvenir à un modèle agentif ? À travers le continuum de normativité et d’agentivité, l’entre-deux prend tout son sens : en quoi l’imaginaire linguistique constitue-t-il un espace à construire, un « à travers » ?
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11

Imbert, M. "Céphéides et binarité. II. Vitesses radiales et orbites spectroscopiques de quatre céphéides galactiques : RX Camelopardalis, MW Cygni, Z Lacertae et U Vulpeculae." Astronomy and Astrophysics Supplement Series 116, no. 3 (May 1996): 497–514. http://dx.doi.org/10.1051/aas:1996312.

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12

Bennett, Philip D., Graham M. Harper, Alexander Brown, and Jeffrey L. Linsky. "NLTE Radiative Transfer in the Extended Atmospheres and Winds of Cool Stars." Symposium - International Astronomical Union 210 (2003): 93–105. http://dx.doi.org/10.1017/s0074180900133285.

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The mechanism responsible for driving the ubiquitous winds of cool giant and supergiant stars remains to be established. To this end, we are constructing semi-empirical models of the extended outer atmospheres (‘chromospheres’) and winds of selected red supergiants. These models are constrained by analyses of the UV line spectra of single stars, and of red supergiants in binaries that eclipse their main-sequence companions: the ζ Aur and VV Cep stars. These detached binaries are well-separated, with no evidence of mass transfer. The C II] 2325 Å line profiles of the binaries are similar to those of comparable single stars, suggesting that the chromospheres remain relatively unperturbed by binarity. However, it is unclear how much binarity disturbs the wind: binary observations suggest a gradual acceleration (β ∼ 3), but line profile analyses of single red supergiants imply a rapid acceleration (β < 1). To date, we have obtained extensive series of HST/GHRS and STIS observations of three eclipsing red supergiant binaries: ζ Aur, HR 2554 and VV Cep. In this paper, we focus on ζ Aur, and present observations and modelling results for this eclipsing binary.
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13

Monro, Surya, and Janneke Van Der Ros. "Trans* and gender variant citizenship and the state in Norway." Critical Social Policy 38, no. 1 (October 19, 2017): 57–78. http://dx.doi.org/10.1177/0261018317733084.

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The last decade has seen the expansion of trans* identities that are gender queer, non-binary, androgynous, or multiply-sexed and gendered in Western Europe. These developments mark a shift from a uniformly gender-binaried system to one that encompasses some degree of gender pluralism, as reflected to an extent in policy changes in some European countries. However, gender binarism is still prevalent. This article uses the case of Norway to demonstrate a contrast between the citizenship statuses afforded to transsexual men and women, and the lack of citizenship rights that people with non-binary identities, and other gender-variant people who are not diagnosed as transsexual, face. The article addresses the historical role of the Norwegian state in perpetuating gender binaries, in key areas such as identity recognition. It then explores the ways in which Norwegian social policy is changing towards more trans-sensitive positions.
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14

Annuk, K. "Spectroscopic observations of the long-period Wolf-Rayet binaries HD 193793 and HD 192641." Symposium - International Astronomical Union 163 (1995): 231–34. http://dx.doi.org/10.1017/s007418090020199x.

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New medium—resolution spectroscopic observations of two long—period WR binaries have been obtained using the 1.5 m telescope at the Tartu Astrophysical Observatory. The binarity of these systems is confirmed and orbital parameters are determined.
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15

Rivinius, T., H. M. J. Boffin, A. Mérand, A. Mehner, J. B. LeBouquin, D. Pourbaix, W. J. de Wit, and C. Martayan. "Not so lonely: The LBV binary HR Car." Proceedings of the International Astronomical Union 12, S329 (November 2016): 440. http://dx.doi.org/10.1017/s1743921317001673.

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AbstractLuminous Blue Variables (LBVs) are a brief phase in the evolution of massive stars, but a very important one. The giant eruptions remain enigmatic, but the discovery of the flagship LBV η Car to be a five-year highly eccentric binary put focus on possible binarity induced mechanism for these outbursts, and prompted binarity searches among LBVs. While several wide LBV binaries were identified, HR Car is the first system found to be similar to η Car, i.e., relatively close & eccentric.
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16

Jorissen, A., H. Van Winckel, L. Siess, A. Escorza, D. Pourbaix, and S. Van Eck. "Li-rich K giants, dust excess, and binarity." Astronomy & Astrophysics 639 (July 2020): A7. http://dx.doi.org/10.1051/0004-6361/202037585.

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The origin of the Li-rich K giants is still highly debated. Here, we investigate the incidence of binarity among this family from a nine-year radial-velocity monitoring of a sample of 11 Li-rich K giants using the HERMES spectrograph attached to the 1.2 m Mercator Telescope. A sample of 13 non-Li-rich giants (8 of them being surrounded by dust according to IRAS, WISE, and ISO data) was monitored alongside. When compared to the binary frequency in a reference sample of 190 K giants (containing 17.4% of definite spectroscopic binaries – SB – and 6.3% of possible spectroscopic binaries – SB?), the binary frequency appears normal among the Li-rich giants (2/11 definite binaries plus 2 possible binaries, or 18.2% SB + 18.2% SB?), after taking account of the small sample size through the hypergeometric probability distribution. Therefore, there appears to be no causal relationship between Li enrichment and binarity. Moreover, there is no correlation between Li enrichment and the presence of circumstellar dust, and the only correlation that could be found between Li enrichment and rapid rotation is that the most Li-enriched K giants appear to be fast-rotating stars. However, among the dusty K giants, the binary frequency is much higher (4/8 definite binaries plus 1 possible binary). The remaining 3 dusty K giants suffer from a radial-velocity jitter, as is expected for the most luminous K giants, which these are.
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17

Igartua, Karine J., and Richard Montoro. "Les minorités sexuelles : concepts, prémisses et structure d’une approche clinique adaptée." Santé mentale au Québec 40, no. 3 (January 29, 2016): 19–35. http://dx.doi.org/10.7202/1034909ar.

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Depuis la dépathologisation de l’homosexualité par les sociétés savantes en santé mentale, la formation des psychothérapeutes sur les minorités sexuelles comporte des lacunes. On préconise souvent de traiter les patients issus de ces minorités comme tous les autres. Or, le développement identitaire de ces personnes comporte des particularités qu’il est nécessaire de connaître pour adapter les évaluations et les interventions psychothérapeutiques comme il se doit. Le présent article propose un cadre théorique, des outils d’évaluation et des pistes thérapeutiques pour accompagner une personne issue d’une minorité sexuelle qui consulte un professionnel en santé mentale.Les concepts de non-binarité de genre, de construction sociale des rôles de genre, les dimensions distinctes de l’orientation sexuelle (attirance émotive, attirance physique, comportement et identité sexuelle), l’indépendance des attirances envers un sexe et envers l’autre, l’impact et les manifestations de l’homophobie ainsi que le processus identitaire sont décrits dans le présent article. Une attitude d’ouverture quant à la diaspora sexuelle est prônée afin d’accueillir le patient et de lui permettre une exploration ouverte dans un cadre thérapeutique sécurisant et sans danger.Les différentes facettes à explorer lors de l’évaluation de la sexualité sont énumérées. Des pistes de traitement psychoéducatif, cognitif et psychodynamique sont proposées, entre autres : déconstruire les mythes pour réduire l’homophobie ou la transphobie, panser les blessures narcissiques et relationnelles dues à l’homophobie, analyser le pour et le contre d’un mode de vie authentique, avec ou sans « sortie du placard » ou coming out.L’apport des interventions familiales et des thérapies de groupe est aussi exposé.
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18

Gil, Juana. "The binarity hypothesis in phonology: 1938–1985." Historiographia Linguistica 16, no. 1-2 (January 1, 1989): 61–88. http://dx.doi.org/10.1075/hl.16.1-2.05gil.

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Summary This paper presents a short history of what has been one of the central hypotheses of phonological theory for many years. The binarity problem has been one of most discussed issues of distinctive feature theory since it was first formulated. In structural phonology (more precisely, the Jakobsonian system) binarism has always been a fundamental concept, and most phonological systems have been based on it. Similarly, all the underlying representations postulated in the SPE framework are thought of as being binary. In current phonology, however, the main interest of many investigators has moved to the suprasegmental level or to metrical phonology, and consequently, the binarity problem remains unresolved. There have been numerous and varied opinions regarding binarism in distinctive feature theory. Some authors argue that binarity proposals are not compatible with phenomena such as coarticulation, but others claim that the non-positivist nature of phonological analysis and the indisputable usefulness of binary features are arguments strong enough to maintain the hypothesis. Finally, other linguists (working from different perspectives) propose a somewhat more relaxed conception of binarity adopting its basic implications. It seems, therefore, time for a review of this classic problem in modern phonology. At the same time, it is also worth restating the question and trying to get some insight into it using the instrumental methods that phonetics provide. This seems to be the construct truly corresponding to the speaker’s mind.
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19

Kamath, Devika. "Post-RGB and Post-AGB stars as tracers of binary evolution." Proceedings of the International Astronomical Union 14, S343 (August 2018): 209–19. http://dx.doi.org/10.1017/s1743921318006154.

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AbstractBinary interactions can alter the intrinsic properties of stars (such as: pulsation, mass-loss, photospheric chemistry, dust-formation, circumstellar envelope morphology etc.) and can even play a dominant role in determining its ultimate fate. While past studies have shown that binarity can end the AGB life of a star, recent studies have revealed that in specific cases binarity also pre-maturely terminate the RGB evolution. A characteristic feature of evolved binaries is the presence of a Keplerian circumbinary disc of gas and dust which plays a lead role in the evolution of the systems. In this article, I will review our advances in the research landscape of post-RGB and post-AGB binary stars, focussing on their observational properties, spectral energy distribution, photospheric chemistry, the evolution of their stable circumbinary discs, and the evolutionary connection between the enigmatic post-AGB/post-RGB binaries, and other systems whose primary component is a white dwarf.
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20

Baade, Dietrich. "Binary Be Stars and Be Binaries." Symposium - International Astronomical Union 151 (1992): 147–56. http://dx.doi.org/10.1017/s0074180900122144.

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Two hypotheses have been put forward for the rôle of binarity in Be stars: (1) All Be stars are interacting binaries. (2) Roughly one-half of the observed Be stars are post-mass exchange binaries with compact companions. Contrary to (1), (2) does not attempt to explain also the existence of disks in Be stars. After the spin-up by mass and angular momentum transfer, the B star somehow has to succeed to form and maintain the disk. Since rapid rotation is only necessary but not sufficient for this transformation, the effect of duplicity would merely be to give more stars the opportunity to become a Be star. Model (1) is not nearly realistic as is also underlined by a new spectroscopic survey for cool companions. The verification of (2) on the basis of the ROSAT All-Sky Survey has just begun; but a serious deficiency of white dwarf companions is already apparent. Binarity currently provides no extra clue on the origin of the Be phenomenon.
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21

Costa, J. M., L. da Silva, and J. R. De Medeiros. "Lithium in Binary Systems with Evolved Components." Symposium - International Astronomical Union 198 (2000): 360–61. http://dx.doi.org/10.1017/s0074180900166859.

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The analysis of 72 binaries with component of luminosity class III shows that the behavior of Li abundance in such systems follows the same pattern presented by their single counterparts. Binarity seems to affect the lithium dilution in systems presenting orbital period lower than about 100 days.
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22

Aerts, Conny. "Asteroseismology of Close Binary Stars." Proceedings of the International Astronomical Union 2, S240 (August 2006): 432–41. http://dx.doi.org/10.1017/s1743921307004413.

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AbstractIn this review paper, we summarise the goals of asteroseismic studies of close binary stars. We first briefly recall the basic principles of asteroseismology, and highlight how the binarity of a star can be an asset, but also a complication, for the interpretation of the stellar oscillations. We discuss a few sample studies of pulsations in close binaries and summarise some case studies. This leads us to conclude that asteroseismology of close binaries is a challenging field of research, but with large potential for the improvement of current stellar structure theory. Finally, we highlight the best observing strategy to make efficient progress in the near future.
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23

Daemgen, Sebastian, Monika G. Petr-Gotzens, and Serge Correia. "T Tauri Binaries in Orion: Evidence for Accelerated and Synchronized Disk Evolution." Proceedings of the International Astronomical Union 7, S282 (July 2011): 452–53. http://dx.doi.org/10.1017/s1743921311028043.

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AbstractIn order to trace the role of binarity for disk evolution and hence planet formation, we started the currently largest spatially resolved near-infrared photometric and spectroscopic study of the inner dust and accretion disks of the individual components of 27 visual, 100–400 AU binaries in the Orion Nebula Cluster (ONC). We study the frequency of Brackett-γ (2.165μm) emitters to assess the frequency of accretion disk-bearing stars among the binaries of the ONC: only 34±9% of the binary components show signs of accretion and, hence, the presence of gaseous inner disks—less than the fraction of gas accretion disks among single stars of the ONC of ~50%. Additionally, we find a significant difference between binaries above and below 200 AU separation: no close systems with only one accreting component are found. The results suggest shortened disk lifetimes as well as synchronized disk evolution.
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24

Arentsen, Anke, Else Starkenburg, Matthew D. Shetrone, Alan W. McConnachie, Éric Depagne, and Kim A. Venn. "Binarity in CEMP-no stars." Proceedings of the International Astronomical Union 13, S334 (July 2017): 273–74. http://dx.doi.org/10.1017/s1743921317008171.

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AbstractWe monitor a sample of CEMP-no stars using the CFHT and SALT telescopes to gain additional knowledge about the possible binarity of these stars. This information is valuable for each individual star, and additionally it could be used to further constrain their binary fraction. We find two new CEMP-no binaries and four additional CEMP-no stars that show some indication of radial velocity variations, resulting in a CEMP-no binary fraction of ~20%.
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25

Tutukov, A. V. "Binarity and Abundance Anomalies in Stars." Symposium - International Astronomical Union 145 (1991): 351–62. http://dx.doi.org/10.1017/s0074180900227496.

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About one half of all stars are close binaries whose components can efficiently interact during their evolution. The interaction of the components significantly influences the evolution and changes the chemical composition of their atmospheres. This review is devoted to the discussion of the binarity role in the creation of stars with an anomalous chemical composition of their envelopes: WR, OBN, OBC, RCrB, Ba, sdBO, Am, Fm, Ap, Bp, helium stars, CO stars, Na giants.
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26

Douchin, D., O. De Marco, D. J. Frew, G. H. Jacoby, J. C. Passy, T. Hillwig, S. B. Howell, et al. "Estimating the binary fraction of planetary nebulae central stars." Proceedings of the International Astronomical Union 7, S283 (July 2011): 346–47. http://dx.doi.org/10.1017/s1743921312011350.

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AbstractDuring the past 20 years, the idea that non-spherical planetary nebulae might need a binary or planetary interaction to be shaped was discussed by various authors. It is now generally agreed that the varied morphologies of planetary nebulae cannot be fully explained solely by single star evolution. Observationally, more binary central stars of planetary nebulae have been discovered, opening new possibilities to understand the connections between binarity and morphology. So far, ≃45 binary central stars of planetary nebulae have been detected, most being close systems detected via flux variability. In order to determine the PN binary fraction, one needs a method that can detect wider binaries. We present here recent results concentrating on binary infrared excess observations aimed at detecting binaries of any separation.
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Johnson, Hollis R. "Binary S and MS Stars." Symposium - International Astronomical Union 151 (1992): 157–66. http://dx.doi.org/10.1017/s0074180900122156.

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We assemble and discuss evidence for binarity in S and MS stars - stars that are enriched in s-process elements. A popular view is that Tc-deficient S and MS stars are not thermally pulsing AGB stars but are mass-transfer binaries. We describe several methods used to test this hypothesis through a search for the putative white-dwarf companion: (1) periodic radial velocity variations, (2) direct observation of the hot companions with IUE, (3) evidence of a hot gas cloud (hotter than a chromosphere) in the system, and (4) evidence of circumstellar dust as revealed through infrared radiation. Results of these methods are compared. All evidence supports the idea that Tc-deficient S and MS stars are mass-transfer binaries, and a large fraction appear to be interactive.
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Di Stefano, Rosanne. "Microlensing: A Tool to Probe Distant Binary Populations." Symposium - International Astronomical Union 200 (2001): 529–38. http://dx.doi.org/10.1017/s0074180900225643.

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Programs designed to observe gravitational microlensing are poised to provide a great deal of information about binary populations far from Earth, including those in the Galactic Bulge, in the Magellanic Clouds, in M31, and perhaps in other external galaxies. Because many millions of stars are monitored, microlensing observations allow us to study binaries in three ways: (1) when they are “involved” in a microlensing event (as either a lens or lensed source), (2) when variability due to binarity produces significant variations in the light curve, and (3) when light from a more distant star is attenuated or refracted by matter associated with the binary system (e.g., in a disk).Microlensing observations will discover large numbers of binaries and planetary systems in a variety of galactic environments. Thus, comparative statistical studies of binary properties (distributions of mass ratios and orbital separations) are possible.An intriguing sign that we have already begun to learn about binaries through microlensing observations comes from work indicating that all of the lenses detected to date may in fact be binaries. For observations along the direction of the Magellanic Clouds this would imply that, if the lenses are primarily located in the Halo, then MACHOs tend to be binaries. If, on the other hand, most of the lenses are located in the Magellanic Clouds, microlensing observations are giving us a unique way to explore a distant stellar population of binaries.
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Bonavita, Mariangela, and Silvano Desidera. "Frequency of Planets in Binaries." Galaxies 8, no. 1 (February 18, 2020): 16. http://dx.doi.org/10.3390/galaxies8010016.

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The frequency of planets in binaries is an important issue in the field of extrasolar planet studies because of its relevance in the estimation of the global planet population of our galaxy and the clues it can give to our understanding of planet formation and evolution. Multiple stars have often been excluded from exoplanet searches, especially those performed using the radial velocity technique, due to the technical challenges posed by such targets. As a consequence and despite recent efforts, our knowledge of the frequency of planets in multiple stellar systems is still rather incomplete. On the other hand, the lack of knowledge about the binarity at the time of the compilation of the target samples means that our estimate of the planet frequency around single stars could be tainted by the presence of unknown binaries, especially if these objects have a different behavior in terms of planet occurrence. In a previous work we investigated the binarity of the objects included in the Uniform Detectability sample defined by Fisher and Valenti (2005), showing how more than 20% of their targets were, in fact, not single stars. Here, we present an update of this census, made possible mainly by the information now available thanks to the second Gaia Data Release. The new binary sample includes a total of 313 systems, of which 114 were added through this work. We were also able to significantly improve the estimates of masses and orbital parameters for most of the pairs in the original list, especially those at close separations. A few new systems with white dwarf companions were also identified. The results of the new analysis are in good agreement with the findings of our previous work, confirming the lack of difference in the overall planet frequency between binaries and single stars but suggesting a decrease in the planet frequency for very close pairs.
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Van Winckel, Hans, Christoffel Waelkens, and Laurens B. F. M. Waters. "Binary “Post-AGB” Stars." Symposium - International Astronomical Union 177 (2000): 285–91. http://dx.doi.org/10.1017/s0074180900002515.

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In this contribution we report on our radial-velocity monitoring of optically bright, high-latitude supergiants that appear to be in a post-AGB evolutionary stage. Binarity is a widespread phenomenon among our sample stars. More precisely: all objects with a near-IR excess in their energy distribution turn out to be binaries while the fraction of binaries in our program stars with only a far-IR excess is very small. The orbital periods, the often non-zero eccentricities, and the sometimes large mass functions set strong constraints on the previous evolution in which mass transfer must have been an important ingredient. We have accumulated observational evidence that the presence of a circum-binary dusty disk has an important dynamical and sometimes even chemical influence on the binary and its evolution. Some objects with a high mass function still defy an explanation.
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31

Pravec, P., M. Wolf, and L. Šarounová. "How many binaries are there among near-Earth asteroids?" International Astronomical Union Colloquium 173 (1999): 159–62. http://dx.doi.org/10.1017/s0252921100031365.

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AbstractThe near-Earth asteroids 1991 VH, 1994 AW1and (3671) Dionysus have been identified as binary systems. They are similar each to other in some of their characteristics. This leads us to a suggestion that there is present a similar mechanism of their creation and/or evolution and that there exists a sizeable population of binaries among NEAs. From a simple geometric model, we estimate that a probability that a binary system with the characteristics similar to the three binaries contains signs of occultation/eclipse phenomena in its lightcurve (thus allowing a detection of the binarity) in particular geometric conditions ispocc~0.30. Then, the actual number of binary NEAs present in a studied sample of NEAs isN =10+8-5. Since the studied sample of NEAs contains effectively 59 objects, we estimate that ∼ 17% of NEAs are binary, this value is uncertain by a factor 2, however.
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32

Vidal, J., D. Cébron, A. ud-Doula, and E. Alecian. "Fossil field decay due to nonlinear tides in massive binaries." Astronomy & Astrophysics 629 (September 2019): A142. http://dx.doi.org/10.1051/0004-6361/201935658.

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Context. Surface magnetic fields have been detected in 5–10% of isolated massive stars, hosting outer radiative envelopes. They are often thought to have a fossil origin, resulting from the stellar formation phase. Yet, magnetic massive stars are scarcer in (close) short-period binaries, as reported by the BinaMIcS (Binarity and Magnetic Interaction in various classes of Stars) Collaboration. Aims. Different physical conditions in the molecular clouds giving birth to isolated stars and binaries are commonly invoked. In addition, we propose that the observed lower magnetic incidence in close binaries may be due to nonlinear tides. Indeed, close binaries are probably prone to tidal instability, a fluid instability growing upon the equilibrium tidal flow via nonlinear effects. Yet, stratified effects have hitherto been largely overlooked. Methods. We theoretically and numerically investigate tidal instability in rapidly rotating, stably stratified fluids permeated by magnetic fields. We use the short-wavelength stability method to propose a comprehensive (local) theory of tidal instability at the linear onset, discussing damping effects. Then, we propose a mixing-length theory for the mixing generated by tidal instability in the nonlinear regime. We successfully assess our theoretical predictions against proof-of-concept, direct numerical simulations. Finally, we compare our predictions with the observations of short-period, double-lined spectroscopic binary systems. Results. Using new analytical results, cross-validated by a direct integration of the stability equations, we show that tidal instability can be generated by nonlinear couplings of inertia-gravity waves with the equilibrium tidal flow in short-period massive binaries, even against the Joule diffusion. In the nonlinear regime, a fossil magnetic field can be dissipated by the turbulent magnetic diffusion induced by the saturated tidal flows. Conclusions. We predict that the turbulent Joule diffusion of fossil fields would occur in a few million years for several short-period massive binaries. Therefore, turbulent tidal flows could explain the observed dearth of some short-period magnetic binaries.
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33

González Mateos, Adriana. "¿BORGES MISÓGINO? CONSTRUCCIÓN DE LA MASCULINIDAD Y CRÍTICA DEL PENSAMIENTO BINARIO EN ALGUNOS TEXTOS DE JORGE LUIS BORGES." Andamios, Revista de Investigación Social 5, no. 9 (August 23, 2008): 99. http://dx.doi.org/10.29092/uacm.v5i9.290.

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Este artículo parte de una discusión de la supuesta misoginia de Borges para analizar varias obras suyas desde el punto de vista de la construcción de las masculinidades y terminar con una exploración de las relaciones entre la obra de Borges y la desestabilización de los sistemas binarios de pensamiento discutida por Foucault y tomada por Judith Butler como punto crucial de su crítica al sistema binario de género.
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34

Arenou, F. "Binaries in Acceleration and Stochastic Hipparcos Solutions." Highlights of Astronomy 11, no. 1 (1998): 549. http://dx.doi.org/10.1017/s1539299600022024.

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The Hipparcos astrometric parameters were obtained through the merging of abscissae data obtained by the FAST and NDAC Data Reduction Consortia. Using a different reduction scheme, other astrometric solutions may be obtained, although not statistically different: a weighted solution using FAST and NDAC astrometric solutions is shown, which gives both astrometric data and associated covariance matrix. This is applied to the acceleration and stochastic solutions. The intersection between merged and weighted solutions is then studied from the point of view of the possible signature of astrometric binaries.New astrometric binaries were found during the Hipparcos data reduction process and their orbits were determined or improved. Other astrometric binaries may however be detected by searching for a quasi-sinusoidal signaturein right ascension and declination. For this purpose the observations of the candidate stars have been combined at a few different epochs, using the Hipparcos astrometric intermediate data.A simultaneous fit of the astrometric and orbital parameters has then been done. However in most of the cases other ground-based data is needed in order to confirm the suspected binarity and to give a reliable orbit.
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Arentsen, A., E. Starkenburg, M. D. Shetrone, K. A. Venn, É. Depagne, and A. W. McConnachie. "Binarity among CEMP-no stars: an indication of multiple formation pathways?" Astronomy & Astrophysics 621 (January 2019): A108. http://dx.doi.org/10.1051/0004-6361/201834146.

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Carbon-enhanced metal-poor (CEMP) stars comprise a high percentage of stars at the lowest metallicities. The stars in the CEMP-no subcategory do not show any s-process enhancement and therefore cannot easily be explained by transfer of carbon and s-process elements from a binary AGB companion. We have performed radial velocity monitoring of a sample of 22 CEMP-no stars to further study the role that binarity plays in this type of CEMP star. We find four new binary CEMP-no stars based on their radial velocity variations; this significantly enlarges the population of known binaries to a total of 11. One of the new stars found to be in a binary system is HE 0107–5240, which is one of the most iron-poor stars known. This supports the binary transfer model for the origin of the abundance pattern of this star. We find a difference in binary fraction in our sample that depends on the absolute carbon abundance, with a binary fraction of 47 +15−14% for stars with a higher absolute carbon abundance and 18 +14−9% for stars with a lower absolute carbon abundance. This might imply a relation between a high carbon abundance and the binarity of a metal-poor star. Although binarity does not equate to mass transfer, there is a possibility that a CEMP-no star in a binary system has been polluted, and care has to be taken in the interpretation of their abundance patterns. We furthermore demonstrate the potential of Gaia of discovering additional binary candidates.
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36

Bodenhofer González, Canela. "Estructuras de sexo-género binarias y cisnormadas tensionadas por identidades y cuerpos no binarios: Comunidades educativas en reflexión y transformación." Revista Punto Género, no. 12 (January 21, 2020): 101. http://dx.doi.org/10.5354/0719-0417.2019.56250.

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Este artículo aborda distintas reflexiones, tensiones y transformaciones generadas a partir de la visibilización de identidades de género, expresiones de género y cuerpos no binarios y/o cisnormados, al interior de comunidades educativas, las que históricamente han tenido estructuras de sexo-género binarias y cisnormadas. En este escenario de disputa, se analizan las relaciones sociales entre actores de la comunidad educativa: docentes, estudiantes y apoderades , . El choque entre estructuras dominantes de sexo-género con experiencias de género y cuerpos no binarios en algunas comunidades educativas gatillaron situaciones de violencias transfóbicas, y en otros casos motivaron procesos de cuestionamientos internos, ahondando en los propios discursos y prácticas cisnormativas producto del sistema de sexo-género hegemónico. La estrategia metodológica utilizada fue cualitativa, para producir la información se realizaron entrevistas no estructuradas a estudiantes trans y docentes cis, y grupo focal a apoderades de estudiantes trans. La técnica de análisis fue análisis de contenido.
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37

Justham, S. "Forming the Progenitors of Explosive Stellar Transients." Proceedings of the International Astronomical Union 14, S339 (November 2017): 33–38. http://dx.doi.org/10.1017/s1743921318002168.

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AbstractExplosive stellar transients arise from diverse situations, including deaths of massive stars, a variety of thermonuclear outbursts, and compact-object mergers. Stellar interactions are heavily implicated in explaining the observed populations of events, and not only those where binarity is obviously involved. Relationships between these classes probably help to elucidate our understanding; for example; the production of double neutron-star mergers from field binaries is thought to be heavily biased towards routes involving stripped core-collapse supernovæ. As we gain an ever more synoptic view of the changing sky, theorists should be mindful of developing an ability to take robust quantitative advantage of the available population information to help constrain the physics. This is complementary to aiming for deep understanding of individual events.
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38

Koumpia, E., K. M. Ababakr, W. J. de Wit, R. D. Oudmaijer, A. Caratti o Garatti, P. Boley, H. Linz, S. Kraus, J. S. Vink, and J. B. Le Bouquin. "Resolving the MYSO binaries PDS 27 and PDS 37 with VLTI/PIONIER." Astronomy & Astrophysics 623 (March 2019): L5. http://dx.doi.org/10.1051/0004-6361/201834624.

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Context. Binarity and multiplicity appear to be a common outcome in star formation. In particular, the binary fraction of massive (OB-type) stars can be very high. In many cases, the further stellar evolution of these stars is affected by binary interactions at some stage during their lifetime. The origin of this high binarity and the binary parameters are poorly understood because observational constraints are scarce, which is predominantly due to a dearth of known young massive binary systems. Aims. We aim to identify and describe massive young binary systems in order to fill in the gaps of our knowledge of primordial binarity of massive stars, which is crucial for our understanding of massive star formation. Methods. We observed the two massive young stellar objects (MYSOs) PDS 27 and PDS 37 at the highest spatial resolution provided by VLTI/PIONIER in the H-band (1.3 mas). We applied geometrical models to fit the observed squared visibilities and closure phases. In addition, we performed a radial velocity analysis using published VLT/FORS2 spectropolarimetric and VLT/X-shooter spectroscopic observations. Results. Our findings suggest binary companions for both objects at 12 mas (30 au) for PDS 27 and at 22–28 mas (42–54 au) for PDS 37. This means that they are among the closest MYSO binaries resolved to date. Conclusions. Our data spatially resolve PDS 27 and PDS 37 for the first time, revealing two of the closest and most massive (>8 M⊙) YSO binary candidates to date. PDS 27 and PDS 37 are rare but great laboratories to quantitatively inform and test the theories on formation of such systems.
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39

Zagaria, Francesco, Giovanni P. Rosotti, and Giuseppe Lodato. "On dust evolution in planet-forming discs in binary systems – I. Theoretical and numerical modelling: radial drift is faster in binary discs." Monthly Notices of the Royal Astronomical Society 504, no. 2 (April 10, 2021): 2235–52. http://dx.doi.org/10.1093/mnras/stab985.

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ABSTRACT Many stars are in binaries or higher order multiple stellar systems. Although in recent years a large number of binaries have been proven to host exoplanets, how planet formation proceeds in multiple stellar systems has not been studied much yet from the theoretical standpoint. In this paper, we focus on the evolution of the dust grains in planet-forming discs in binaries. We take into account the dynamics of gas and dust in discs around each component of a binary system under the hypothesis that the evolution of the circumprimary and the circumsecondary discs is independent. It is known from previous studies that the secular evolution of the gas in binary discs is hastened due to the tidal interactions with their hosting stars. Here, we prove that binarity affects dust dynamics too, possibly in a more dramatic way than the gas. In particular, the presence of a stellar companion significantly reduces the amount of solids retained in binary discs because of a faster, more efficient radial drift, ultimately shortening their lifetime. We prove that how rapidly discs disperse depends both on the binary separation, with discs in wider binaries living longer, and on the disc viscosity. Although the less-viscous discs lose high amounts of solids in the earliest stages of their evolution, they are dissipated slowly, while those with higher viscosities show an opposite behaviour. The faster radial migration of dust in binary discs has a striking impact on planet formation, which seems to be inhibited in this hostile environment, unless other disc substructures halt radial drift further in. We conclude that if planetesimal formation were viable in binary discs, this process would take place on very short time-scales.
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40

Latorre Chávez, Rhonny, and Arnaldo Salazar Barnechea. "ESCOLARIDAD E INCLUSIÓN: SUBJETIVIDADES TRANS EN EL ÁMBITO ESCOLAR." Paulo Freire. Revista de Pedagogía Crítica, no. 19 (July 3, 2018): 21–36. http://dx.doi.org/10.25074/07195532.19.948.

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Este artículo es parte de un esfuerzo por visibilizar la experiencia de escolaridad en personas trans de Chile, en el marco de un modelo educativo estandarizado y binario. Se entrega una contextualización de los estudios y cifras disponibles hasta el momento, y se complementa con relatos concretos de trayectorias educativas de personas género no conforme, haciendo énfasis en los puntos críticos que vuelven la trayectoria educativa -al parecer-, incompatible con la generación de una identidad no binaria.
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41

Burgasser, Adam J., J. Davy Kirkpatrick, I. Neill Reid, Michael E. Brown, Cherie L. Miskey, and John E. Gizis. "Binarity in Brown Dwarfs: T Dwarf Binaries Discovered with theHubble Space TelescopeWide Field Planetary Camera 2." Astrophysical Journal 586, no. 1 (March 20, 2003): 512–26. http://dx.doi.org/10.1086/346263.

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42

Mermilliod, Jean-Claude, and Beatriz García. "Spectroscopic Binaries in Young Open Clusters." Symposium - International Astronomical Union 200 (2001): 191–98. http://dx.doi.org/10.1017/s0074180900225217.

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We have analysed the binarity and multiplicity characteristics of 120 O-type stars in 22 very young open clusters and found marked differences between the “rich” (N ≥ 6 O-type stars and primaries) and “poor” (N = 1) clusters. In the rich clusters, the binary frequencies vary between 14% (1 SB among 7 stars) and 80% (8 SBs among 10 stars). Multiple systems seem not to be frequent and stars are spread all over the cluster area. In poor clusters, the binary frequency of the O-type objects is nearly 100%, with orbital periods around 3 days. Several binaries are also eclipsing. Additional companions are always present. They form either hierarchical multiple stars or trapezium systems. These massive multiple systems are generally found close to the cluster center, although there are exceptions.
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43

Grundstrom, Erika D., Douglas R. Gies, Christina Aragona, Tabetha S. Boyajian, E. Victor Garcia, Amber N. Marsh, M. Virginia McSwain, Rachael M. Roettenbacher, Stephen J. Williams, and David W. Wingert. "Spectroscopic Hα and Hγ survey of field Be stars: 2004–2009." Proceedings of the International Astronomical Union 6, S272 (July 2010): 290–91. http://dx.doi.org/10.1017/s1743921311010611.

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AbstractMassive O- and B-type stars are “cosmic engines” in the Universe and can be the dominant source of luminosity in a galaxy. The class of Be stars are rapidly rotating B-type stars that lose mass in an equatorial, circumstellar disk (Porter & Rivinius 2003) and cause Balmer and other line emission. Currently, we are unsure as to why these stars rotate so quickly but three scenarios are possible: they may have been born as rapid rotators, spun up by binary mass transfer, or spun up during the main-sequence evolution of B stars. In order to investigate these scenarios for this population of massive stars, we have been spectroscopically observing a set of 115 field Be stars with the Kitt Peak Coudè Feed telescope in both the Hα and Hγ wavelength regimes since 2004. This time baseline allows for examination of variability properties of the circumstellar disks as well as determine candidates for closer examination for binarity. We find that 90% of the observed stars show some variability with 8% showing significant variability over the 5-year baseline. Such values may be compared with the significant variability seen in some clusters such as NGC 3766 (McSwain 2008). Also, while ~20% of the sample consists of known binaries, we find that another 15–30% of the sample shows indications of binarity.
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44

Spindola Cardenas, Jorge. "RITUALES DE MACHI Y SUBVERSIONES DE GÉNERO EN LA POESÍA MAPUCHE ACTUAL." Revista Internacional de Culturas y Literaturas, no. 17 (2015): 54–68. http://dx.doi.org/10.12795/ricl.2015.i17.05.

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Este artículo indaga desde la diferencia cultural otras ontologías de sexo y género que cuestionan las dicotomías binarias excluyentes de la modernidad eurocentrada, para ello se analizan poemas de Adriana Paredes Pinda (2005), poeta y machi (chamán) del pueblo mapuche-williche, en el sur de Chile. La autora pone en juego prácticas corporales y cognitivas basadas en principios duales y complementarios, propias de un ethos mapuche, que resisten el sistema heteronormativo de género binario excluyente (Judith Butler, 1998; Beatriz Preciado, 2011), liberando producciones de subjetividad (Felix Guattari, 1996) in-validadas históricamente por diversos dispositivos de saber-poder (Foucault, 1998) de la modernidad colonial.
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45

Tokovinin, Andrei. "Statistics of Multiple Stars: Some Clues to Formation Mechanisms." Symposium - International Astronomical Union 200 (2001): 84–92. http://dx.doi.org/10.1017/s0074180900225096.

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The available information on the statistics of high multiplicity (3–6 components) systems is reviewed. The ratio of triple to binary systems is f3 ≍ 0.11, while fn ≍ 0.25 for higher n. Despite selection effects in the multiple star catalogue, the signatures of formation mechanisms are found in the distributions of period ratios and mass ratios. For example, the frequent occurrence of close sub-systems with periods less than 6 days can be explained by tidal dissipation in a 3-body system. In triple stars the angular momentum vectors of inner orbits are inclined to those of outer orbits by an average angle of 50°, hence the orbital spins are neither co-aligned nor completely random. Close binaries have a tendency to be found in higher-multiplicity systems, showing that close and wide binarity is statistically related. Future theoretical and observational studies are outlined.
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46

Murphy, Simon J., Nicholas H. Barbara, Daniel Hey, Timothy R. Bedding, and Ben D. Fulcher. "Finding binaries from phase modulation of pulsating stars with Kepler – VI. Orbits for 10 new binaries with mischaracterized primaries." Monthly Notices of the Royal Astronomical Society 493, no. 4 (February 27, 2020): 5382–88. http://dx.doi.org/10.1093/mnras/staa562.

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ABSTRACT Measuring phase modulation in pulsating stars has proven to be a highly successful way of finding binary systems. The class of pulsating main-sequence A and F variables, known as δ Scuti stars consists of particularly good targets for this, and the Kepler sample of these has been almost fully exploited. However, some Keplerδ Scuti stars have incorrect temperatures in stellar properties catalogues, and were missed in previous analyses. We used an automated pulsation classification algorithm to find 93 new δ Scuti pulsators among tens of thousands of F-type stars, which we then searched for phase modulation attributable to binarity. We discovered 10 new binary systems and calculated their orbital parameters, which we compared with those of binaries previously discovered in the same way. The results suggest that some of the new companions may be white dwarfs.
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47

Boffin, H. M. J. "Theoretical and Observational Tests for the Mass Transfer Scenario of Ba II stars." International Astronomical Union Colloquium 106 (1989): 223. http://dx.doi.org/10.1017/s025292110006293x.

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Ba II stars are red giants showing an enhancement of carbon and s-process elements. The elucidation of their nature seems to require a mass transfer, either by wind or Roche lobe overflow, during their past evolution. Were it really the case, all Ba II stars would be binaries with a white dwarf as companion. To better understand the exact role of their binarity, more orbits are definitely needed. They can be obtained by monitoring the radial velocity variations of those stars. However, a quicker way to find new Ba II stars with orbital elements would be to search for their existence among known spectroscopic binaries. This would also crucially test whether mass transfer is a necessary and sufficient condition to explain Ba II stars. If it is indeed the case, then all spectroscopic binaries, made of a giant and a white dwarf, in a reasonable range of periods, would exhibit the Ba II pecularity. However, the discovery of a peculiar giant+main sequence binary system would imply a revision of our ideas about Ba II stars. To this end have we begun a systematic spectral survey of spectroscopic binaries with orbital periods in the range characteristic of known Ba II stars and containing a red giant. The realization that some stars of the catalogue we compiled were already identified as semibariium stars encourages us to pursue our investigation. Coude spectra were taken with the 152 cm telescope, at a dispersion of 12 Å mm−1 . Until now, 2 stars out of a sample of 31 present a slight enhancement of s-process elements (their anomaly being in the range Ba 0.3 to 0.5), and 2 more appear to be good candidates. The study of a larger sample is currently in progress. A discussion of the nature of the companion to the 2 newly discovered semibarium stars is presented on grounds of their mass function and photometric indices.
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48

García, Débora. "Empoderamiento de las mujeres de la maquila." Cuaderno Jurídico y Político 1, no. 2 (January 15, 2016): 66–74. http://dx.doi.org/10.5377/cuadernojurypol.v1i2.10990.

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Los estudios de género de las universidades contribuyen a una sensibilización de conciencias sobre las condiciones de las mujeres, a partir de los esquemas binarios de relaciones en la cultura y el desarrollo social. Este despertar de conciencia es signo de los procesos de emancipación y de impulsos curriculares que coadyuvan a potenciar los saberes generados por agentes de producción cultural y desde otras lógicas no binarias, entre los cuales se encuentran las mujeres. En la experiencia de la Universidad Politécnica de Nicaragua, se cuenta con varias iniciativas de formación con ejes focalizados, uno de estos en el empoderamiento de las mujeres trabajadoras a través del Instituto Centroamericano de Estudios Jurídicos y Políticos, ICEJP-UPOLI.
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49

García, Débora. "Empoderamiento de las mujeres de la maquila." Cuaderno Jurídico y Político 1, no. 4 (May 10, 2016): 87–95. http://dx.doi.org/10.5377/cuadernojurypol.v1i4.11056.

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Los estudios de género de las universidades contribuyen a una sensibilización de conciencias sobre las condiciones de las mujeres, a partir de los esquemas binarios de relaciones en la cultura y el desarrollo social. Este despertar de conciencia es signo de los procesos de emancipacióny de impulsos curriculares que coadyuvan a potenciar los saberes generados por agentes de producción cultural y desde otras lógicas no binarias, entre los cuales se encuentran las mujeres. En la experiencia de la Universidad Politécnica de Nicaragua, se cuenta convarias iniciativas de formación con ejes focalizados, uno de estos en el empoderamiento de las mujeres trabajadoras a través del Instituto Centroamericano de Estudios Jurídicos yPolíticos, ICEJP-UPOLI.
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50

Martins, F., L. Mahy, and A. Hervé. "Properties of six short-period massive binaries: A study of the effects of binarity on surface chemical abundances." Astronomy & Astrophysics 607 (November 2017): A82. http://dx.doi.org/10.1051/0004-6361/201731593.

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Context.A significant percentage of massive stars are found in multiple systems. The effect of binarity on stellar evolution is poorly constrained. In particular, the role of tides and mass transfer on surface chemical abundances is not constrained observationally.Aims.The aim of this study is to investigate the effect of binarity on the stellar properties and surface abundances of massive binaries.Methods.We performed a spectroscopic analysis of six Galactic massive binaries. We obtained the spectra of individual components via a spectral disentangling method and subsequently analyzed these spectra by means of atmosphere models. The stellar parameters and CNO surface abundances were determined.Results.Most of these six systems are comprised of main-sequence stars. Three systems are detached, two are in contact, and no information is available for the sixth system. For 11 out of the 12 stars studied, the surface abundances are only mildly affected by stellar evolution and mixing. The surface abundances are not different from those of single stars within the uncertainties. The secondary of XZ Cep is strongly chemically enriched. Considering previous determinations of surface abundances in massive binary systems suggests that the effect of tides on chemical mixing is limited, whereas the mass transfer and removal of outer layers of the mass donor leads to the appearance of chemically processed material at the surface, although this is not systematic. The evolutionary masses of the components of our six systems are on average 16.5% higher than the dynamical masses. Some systems seem to have reached synchronization, while others may still be in a transitory phase.
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