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Rozprawy doktorskie na temat „Galaxies”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 25 lipca 2025

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1

Brouillet, Nathalie. "Contenu moléculaire de galaxies en interaction : la galaxie spirale Messier 81 et le groupe de galaxies de M81." Bordeaux 1, 1989. http://www.theses.fr/1989BOR10619.

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La distribution et l'abondance du gaz atomique et moleculaire dans les galaxies permettent l'etude de leur histoire et de la formation stellaire. Nous nous sommes interesses a la galaxie spirale messier 81, qui est consideree comme un prototype ideal pour tester la theorie des ondes de densite. Nous avons decouvert la presence d'une emission co dans m81 et une cartographie etendue a revele une deficience moleculaire au centre ainsi qu'une distribution annulaire. Des observations a plus haute resolution spatiale nous ont aussi permis de comparer les distributions relatives du co et d'autres tra
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2

Belfort, Patrick. "Proprietes infrarouges et optiques des galaxies iras : des galaxies normales aux galaxies a flambee." Paris 7, 1987. http://www.theses.fr/1987PA077184.

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Grace au satellite iras, on a decouvert un type de galaxies dont le rapport luminosite infrarouge sur bleue peut atteindre 100 ou plus; ces galaxies qu'on suppose subir des flambees de formation d'etoile sont l'objet de cette these. Un modele photometrique simple a ete construit pour rendre compte des proprietes ir lointain et optique de ces galaxies a flambees. La photometrie ccd d'un certain echantillon de galaxies iras a ete realisee pour tester le modele: l'accord modele-observation est satisfaisant et la force, ainsi que l'extinction des flambees ont pu etre estimees
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3

Belfort, Patrick. "Propriétés infrarouges et optiques des galaxies Iras des galaxies normales aux galaxies à flambée /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37602748s.

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4

Snaith, Owain N. "The environment of galaxies and groups of galaxies." Thesis, University of Central Lancashire, 2011. http://clok.uclan.ac.uk/2931/.

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In this thesis, we employ two numerical tools - semi- analytical models and N-body plus hydrodynamical simulations of large scale structure and individual galaxies - to explore the underlying physics governing the formation and evolution of groups of galaxies, and the role of environment in generating polar structures around disk galaxies. Using phenomenological models of baryonic physics imposed upon large-scale dissipationless simulations of the Universe, semi-analytic models (SAMs) are one of the principal methods used to model large samples of model galaxies. We sought to examine the prope
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5

Gruel, Nicolas. "Nature et formation des galaxies : les galaxies compactes lumineuses." Observatoire de Paris, 2002. https://hal.archives-ouvertes.fr/tel-02071406.

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L’évolution de la luminosité infrarouge et de l’UV peut s’expliquer par une chute de la formation stellaire entre les décalages spectraux de 0. 4 à 1, c’est-à-dire depuis 7 à 10 milliards d’années. Cette chute est due à deux types de galaxies : les galaxies infrarouges et les galaxies compactes lumineuses. Au cours de cette thèse, j’ai particulièrement étudié un échantillon de spectres de ces galaxies compactes observées au VLT. Ces objets sont très importants : il y a environ 7 milliards d’années ces galaxies représentaient la population dominante. De plus, malgré leur petite taille, elles ra
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6

Epinat, Benoit. "Des Galaxies Proches Aux Galaxies Lointaines: Etudes Cinématique et Dynamique." Phd thesis, Université de Provence - Aix-Marseille I, 2008. http://tel.archives-ouvertes.fr/tel-00413769.

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L'étude cinématique des galaxies locales et lointaines permet de contraindre les scénarios de formation et d'évolution des galaxies. Pour cela, la spectroscopie à champ intégral permet une étude détaillée de la cinématique des galaxies proches et fournit depuis peu des indices sur la cinématique des galaxies lointaines. Cette thèse s'appuie principalement sur l'utilisation de l'échantillon cinématique de galaxies locales GHASP. Cet échantillon de référence composé de 203 galaxies spirales et irrégulières de l'Univers local dans des environnements peu denses observées par interférométrie de Fab
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7

White, David Allen. "The multiphase medium of elliptical galaxies and clusters of galaxies." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240155.

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8

Epinat, Benoît. "Des galaxies proches aux galaxies lointaines : études cinématique et dynamique." Aix-Marseille 1, 2008. https://tel.archives-ouvertes.fr/tel-00413769v3.

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L’étude cinématique des galaxies locales et lointaines permet de contraindre les scénarios de formation et d’évolution des galaxies. Pour cela, la spectroscopie à champ intégral permet une étude détaillée de la cinématique des galaxies proches et fournit depuis peu des indices sur la cinématique des galaxies lointaines. Cette thèse s’appuie principalement sur l’utilisation de l’échantillon cinématique de galaxies locales GHASP. Cet échantillon de référence composé de 203 galaxies spirales et irrégulières de l’Univers local dans des environnements peu denses observées par interférométrie de Fab
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9

Lima-Neto, Gastao Bierrenbach. "Formation de galaxies elliptiques et structure des amas de galaxies." Paris 7, 1993. http://www.theses.fr/1993PA077317.

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Le theme de cette these est l'etude de la formation et de la structure de galaxies elliptiques au sein de groupes et amas de galaxies. Cette etude se divise selon deux approches principales: l'analyse des proprietes physiques et morphologiques de deux amas de galaxies, abell 85 et 2199 ; et l'etude numerique de la formation de galaxies elliptiques par coalescence de galaxies spirales. Les amas de galaxies ont ete analyses a partir de cliches pris par le detecteur ipc a bord du satellite einstein dans le domaine de rayonnement x. Le gaz intra-amas responsable de l'emission x est suppose etre en
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10

Chemin, Laurent. "Cinématique et dynamique de galaxies spirales." Paris 6, 2003. http://www.theses.fr/2003PA066052.

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11

Karl, Simon. "The Antennae Galaxies." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-140782.

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12

Cordey, R. A. "Nearby radio galaxies." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356676.

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13

Millington, S. J. C. "Clusters of galaxies." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382461.

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14

Wright, Susan Clare. "Blazar host galaxies." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243088.

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15

Guo, Quan. "Galactic satellite galaxies." Thesis, Durham University, 2013. http://etheses.dur.ac.uk/7354/.

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In this thesis, we investigate the luminosity functions (LFs) and projected number density profiles of galactic satellites around isolated primaries of differing luminosity. To this end, we develop a new method to select isolated galactic satellite systems using the Sloan Digital Sky Survey (SDSS) spectroscopic and photometric galaxy samples. For specific luminosity primaries, we are able to stack as many as ~ 50,000 galaxy systems to obtain robust statisitcal results. Based on these samples, we derive accurate satellite luminosity functions extending almost 8 magnitudes fainter than their pri
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16

Lewis, Alexander John Robert. "Ultra-red galaxies." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/33044.

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Dusty star-forming galaxies (DSFGs) are highly luminous (LFIR ≳ 10¹² L⊙), very distant (z ≳2.5) and ≳ 10x rarer then 'normal', NIR-selected (BzK), star-forming galaxies. Capable of producing a Mstars ≳ 10¹¹-M⊙ galaxy after a tburst ~ 100-Myr burst of late-stage, merger-induced star formation, DSFGs naturally provide extreme laboratories with which to study the formation and evolution of massive structures within the Universe. Thus far, however, theoretical models have struggled to reconcile the observed abundance and redshift distribution of these massive, dust-enshrouded galaxies that occupy
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17

Reda, Fatma M. "Isolated elliptical galaxies." Swinburne Research Bank, 2007. http://hdl.handle.net/1959.3/20857.

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Thesis (Ph.D) - Swinburne University of Technology, Faculty of Information & Communication Technologies, 2007.<br>A thesis presented in fulfillment of the requirements of Doctor of Philosophy, Faculty of Information and Communication Technologies, Swinburne University of Technology, 2007. Typescript. Bibliography p. 109-118.
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18

GIOANNINI, LORENZO. "Dust across galaxies." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2918677.

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In this thesis, we investigate the evolution of dust mass and chemical composition in different galaxies by means of new detailed chemical evolution models which account for the presence of dust. We adopt updated prescriptions for dust formation in Asymptotic Giant Branch (AGB) stars and Type II SNe, as well as for dust accretion and destruction in the interstellar medium (ISM). We predict in detail the evolution of the abundances of single elements both in the dust and in gas phase of the ISM, and distinguish the contributions from different sources during the galactic time. We study the du
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19

Koleva, Mina V. "Les populations stellaires des galaxies naines elliptiques." Thesis, Lyon 1, 2009. http://www.theses.fr/2009LYO10020.

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Le passé des galaxies est inscrit dans leurs populations stellaires. Les galaxies les plus nombreuses sont les naines elliptiques (dEs), survivantes de la construction hiérarchique des structures. Par conséquent, l’évolution de l’Univers peut être lue dans les populations de ces galaxies. Dans cette thèse, je présente et je valide une méthode efficace et précise pour étudier l’histoire de la formation stellaire et de l’enrichissement en métaux des systèmes stellaires en se servant de spectres intégrés le long de la ligne de visée. La méthode a été testée de manière extensive avec des spectres
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20

Vázquez, Mata José Antonio. "Statistical characterization of galaxies in groups and isolated galaxies : Luminosity Function." Thesis, University of Sussex, 2016. http://sro.sussex.ac.uk/id/eprint/61394/.

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Evolution of galaxies is one of the most important topics in astronomy to understand how the universe has been evolving. In particular, galaxy groups are important because they are the observable equivalent of dark matter (DM) haloes, and thus offer a direct insight into the physics that has occurred in the DM haloes in the Universe up to the present day. Isolated galaxies are crucial for studying intrinsic and secular processes able to affect the structure, morphology, and dynamics of galaxies for obtaining clear relationships and correlations to be confronted with the model predictions. The
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21

Maier, Christian. "Emission line galaxies from CADIS high redshift Lyman-[alpha] [Lyman-alpha] galaxies and metal poor galaxies at medium redshift /." [S.l. : s.n.], 2002. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10358880.

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22

Secrest, Nathan J., Henrique R. Schmitt, Laura Blecha, Barry Rothberg, and Jacqueline Fischer. "Was 49b: An Overmassive AGN in a Merging Dwarf Galaxy?" IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/623232.

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We present a combined morphological and X-ray analysis of Was. 49, an isolated, dual-AGN system notable for the presence of a dominant AGN, Was 49b, in the disk of the primary galaxy, Was 49a, at a projected radial distance of 8. kpc from the nucleus. Using X-ray data from Chandra, the Nuclear Spectroscopic Telescope Array, and Swift, we find that this AGN has a bolometric luminosity of L-bol similar to 10(45) erg s(-1), with a black hole mass of M-BH = 1.3(-0.9)(+10)M(circle dot) . Despite the large mass, our analysis of optical data from the Discovery Channel Telescope shows that the superma
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23

Guo, Yicheng, David C. Koo, Yu Lu, et al. "STELLAR MASS–GAS-PHASE METALLICITY RELATION AT 0.5 ≤ z ≤ 0.7: A POWER LAW WITH INCREASING SCATTER TOWARD THE LOW-MASS REGIME." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621237.

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We present the stellar mass (M-*)-gas-phase metallicity relation (MZR) and its scatter at intermediate redshifts (0.5 <= z <= 0.7) for 1381 field galaxies collected from deep spectroscopic surveys. The star formation rate (SFR) and color at a given M-* of this magnitude-limited (R less than or similar to 24 AB) sample are representative of normal star-forming galaxies. For masses below 10(9) M-circle dot, our sample of 237 galaxies is similar to 10 times larger than those in previous studies beyond the local universe. This huge gain in sample size enables superior constraints on the MZR and it
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24

Tenjes, P. "Models of regular galaxies." Tartu, Estonia : Tartu Ülikool, 1993. http://catalog.hathitrust.org/api/volumes/oclc/30612322.html.

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25

Salmi, Fadia. "Comprendre les modes de formation d’étoiles dans l’univers lointain." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112173/document.

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L'objectif de mon travail de thèse a consisté à tenter de comprendre quels sont les mécanismes principaux à l'origine de la formation d'étoiles dans les galaxies au cours des derniers dix milliards d'années. Alors qu'il avait été proposé dans le passé que le rôle des fusions de galaxies était dominant pour expliquer l'allumage de la formation d'étoiles dans les galaxies lointaines formant leurs étoiles à de très grands taux, des études plus récentes ont au contraire mis en évidence des lois d'échelles reliant le taux de formation d'étoiles des galaxies à leur masse stellaire ou masse de gaz. L
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26

Owers, Matthew Scott Physics Faculty of Science UNSW. "The effects of merging and environment on galaxies and clusters of galaxies." Publisher:University of New South Wales. Physics, 2008. http://handle.unsw.edu.au/1959.4/42795.

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This thesis addresses two fundamental questions in astrophysics: (i) To what extent is environment a driver of galaxy evolution? And (ii) How does hierarchical structure formation affect the galaxy environment? The former is addressed by examining the environments of starburst galaxies, the latter by examining clusters undergoing major mergers with focus placed on the efficacy of ??cold fronts?? in identifying systems that have recently undergone a major merger - an essential first step to understanding their impact. For the first of these studies, the 2dFGRS was exploited to select large sam
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27

Prugniel, Philippe. "Galaxies en interaction et evolution dynamique des galaxies elliptiques de faible masse." Toulouse 3, 1989. http://www.theses.fr/1989TOU30044.

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Discussion de l'evolution des galaxies a partir d'observations et d'experiences numeriques. Un systeme de traitement d'image qui integre de nouvelles methodes d'analyse de donnees est developpe. Le role des rencontres gravitationnelles entre galaxies est envisage comme moteur de l'evolution morphologique et dynamique des galaxies elliptiques
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28

Cañameras, R., N. Nesvadba, R. Kneissl, et al. "Planck’s dusty GEMS." EDP SCIENCES S A, 2017. http://hdl.handle.net/10150/625826.

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We present an analysis of high-resolution ALMA interferometry of CO(4-3) line emission and dust continuum in the "Ruby" (PLCK_G244.8+54.9), a bright, gravitationally lensed galaxy at z = 3.0 discovered with the Planck all-sky survey. The Ruby is the brightest of Planck's dusty GEMS, a sample of 11 of the brightest gravitationally lensed high-redshift galaxies on the extragalactic sub-mm sky. We resolve the high-surface-brightness continuum and CO line emission of the Ruby in several extended clumps along a partial, nearly circular Einstein ring with 1.4 '' diameter around a massive galaxy at z
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29

Díaz, García S. (Simón). "Signatures of secular evolution in disk galaxies." Doctoral thesis, University of Oulu, 2016. http://urn.fi/urn:isbn:9789526213187.

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Abstract In this thesis we shed light on the formation and evolution of disk galaxies, which often host a stellar bar (about 2/3 of cases). In particular, we address the bar-driven secular evolution, that is, the steady redistribution of stellar and gaseous material through the disk induced by the bar torques and resonances. We characterize the mass distribution of the disks in the Spitzer Survey of Stellar Structure in Galaxies (S4G, Sheth et al. 2010) and study the properties of the different stellar structure components and the interplay between them. We use 3.6µm photometry for ~ 1300 fa
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30

Knudsen, Kirsten K., Johan Richard, Jean-Paul Kneib, et al. "[C ii] emission in z ∼ 6 strongly lensed, star-forming galaxies." OXFORD UNIV PRESS, 2016. http://hdl.handle.net/10150/621730.

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The far-infrared fine-structure line [C II] at 1900.5 GHz is known to be one of the brightest cooling lines in local galaxies, and therefore it has been suggested to be an efficient tracer for star formation in very high redshift galaxies. However, recent results for galaxies at z > 6 have yielded numerous non-detections in star-forming galaxies, except for quasars and submillimetre galaxies. We report the results of ALMA observations of two lensed, star-forming galaxies at z = 6.029 and z = 6.703. The galaxy A383-5.1 (star formation rate [SFR] of 3.2 M-circle dot yr(-1) and magnification of m
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31

West, Andrew Alan. "HI selected galaxies in the Sloan Digital Sky Survey /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/5418.

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32

Bernadi, Mariangela. "Nearby Early-type Galaxies." Diss., lmu, 1999. http://nbn-resolving.de/urn:nbn:de:bvb:19-2055.

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33

Valiante, Elisabetta. "High-redshift infrared galaxies." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-91747.

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34

Kroeker, Teresa Lynn. "Evolution of elliptical galaxies." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0012/NQ35211.pdf.

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35

Sheth, Ravi Kiran. "Gravitational clustering of galaxies." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320096.

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36

Crawford, John W. "Star formation in galaxies." Thesis, Queen Mary, University of London, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437102.

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37

Bunker, Andrew John. "Searches for distant galaxies." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337592.

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38

Weadock, Julie Louise. "Intermediate redshift radio galaxies." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325935.

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39

Halliday, Claire. "Low luminosity elliptical galaxies." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4639/.

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Long-slit spectra for the photometric axes of a sample of 14 elliptical galaxies, predominantly low-luminosity ellipticals, in the Virgo cluster and in nearby groups, are studied to investigate the galaxy kinematical structure and stellar evolutionary history. To determine the galaxy kinematical structure, the shape of the line-of-sight velocity distribution (hereafter LOSVD) is measured using the Fourier Correlation Quotient method of Bender (1990), adopting the parametrisation of the LOSVD due to van der Marel and Franx (1993). This parametrisation enables the asymmetrical and symmetrical de
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40

Wilkinson, David Adam. "Molecular hydrogen in galaxies." Thesis, Durham University, 1987. http://etheses.dur.ac.uk/6657/.

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This study aims to understand the key role played by molecular hydrogen in the evolution of galaxies, with a view to constraining its radial distribution in the Galaxy and the CO→H(_2) conversion factor α(_20).The star formation rate is shown to be correlated with the surface density of H(_2). A correlation between the molecular hydrogen fraction and the metallicity of a region allows the time evolution of H(_2) to be described. This leads to a modified 'Schmidt Law' of the SFR which explains quite naturally the production of galactic metallicity gradients and the constancy of the SFR in the a
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41

Huang, S. N. "Dynamics of interacting galaxies." Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378332.

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42

Tadhunter, C. N. "Emission line radio galaxies." Thesis, University of Sussex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379458.

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43

Cotter, Gary. "Distant giant radio galaxies." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364574.

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44

Forbes, Duncan Alan. "Galaxies in the infrared." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240127.

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45

Scott, Caroline. "Active and merging galaxies." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/24872.

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Galaxy close pairs are studied to investigate the effects of gravitational interactions on star formation and black hole accretion processes in merger progenitors. We derive star formation rates from near-ultraviolet luminosities; this is a new method for studying mergers and provides unique insight into recent star formation rates. A range of progenitor masses are considered, as well as the separation between merging galaxies and the environment they inhabit. Star formation enhancements in major versus minor close pairs are also considered. Pairs are extracted from the SDSS by identifying gal
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46

Williams, Michael J. "Early-type disk galaxies." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:936168ab-f49a-410a-9e1b-80c7ad7cf556.

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In this thesis I investigate the dynamics and stellar populations of a sample of 28 edge-on early-type (S0--Sb) disk galaxies, 22 of which host a boxy or peanut-shaped bulge. I begin by constructing mass models of the galaxies based on their observed photometry and stellar kinematics. Subject to cosmologically motivated assumptions about the shape of dark haloes, I measure in a purely dynamical way their stellar and dark masses. I make a preliminary comparison between the dynamically determined stellar masses and those predicted by stellar population models. I then compare the Tully-Fisher (lu
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47

Geen, Samuel Thomas. "Feedback in dwarf galaxies." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:70568e50-ff79-4c2a-a731-ce1826015b0d.

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Stellar feedback processes have been suggested as a mechanism for explaining various properties of galaxies, especially dwarf galaxies, which have weaker potentials and thus lower escape velocities for galactic winds. In this thesis, I present work done during my DPhil to better understand these processes. I begin by discussing the techniques used to simulate galaxies as collections of astrophysical fluids in a cosmolog- ical context, and present some methods for interpreting the results of such simulations. I then present two projects aimed at furthering our understanding of feedback in dwarf
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48

SYGNET, J.-FRANCOIS. "Dynamique des galaxies spirales." Paris 7, 1989. http://www.theses.fr/1989PA077118.

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Etude de la dynamique de la composante stellaire des galaxies discoidales et des mecanismes d'instabilites a la base de la formation et de l'evolution des spirales et des barres en utilisant le concept spiral de densite considere comme le principal responsable de leur structure observee. On montre comment un traitement precis des equations fluides et de leur fermeture permet d'obtenir une relation de dispersion exacte pour les ondes spirales. Des simulations numeriques d'un modele de galaxie realiste sont ensuite etudiees. Un des problemes principaux de la theorie des ondes de densite est ensu
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Jones, Mark, Beverly J. Smith, and Mark Giroux. "Detached Tidal Dwarf Galaxies." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/asrf/2019/schedule/127.

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Dwarf galaxies may form in the tidal tails of galaxy interactions. If these tidal dwarf galaxies (TDGs) detach from their parent galaxies, then an independent dwarf galaxy emerges. However, the lifespan of such objects is uncertain. Using IR, UV, and optical images, we conducted a search for detached TDGs from a set of 40 interacting galaxy pairs in the local Universe, and a control sample of 37 spiral galaxies. Both samples include 3.6 micron, 4.5 micron, 8 micron, and NUV images. In an earlier study (Smith et al. 2016), we used the IRAF daofind software (Stetson 1987) to search for star-form
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Thompson, David Djorgovski S. G. "Surveys for primeval galaxies /." Diss., Pasadena, Calif. : California Institute of Technology, 1995. http://resolver.caltech.edu/CaltechETD:etd-10242007-142316.

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