Relevant bibliographies by topics / Cyg OB2

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Cyg OB2'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "Cyg OB2"

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Massey, Philip, and A. B. Thompson. "Massive stars in CYG OB2." Astronomical Journal 101 (April 1991): 1408. http://dx.doi.org/10.1086/115774.

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Mossoux, E., J. M. Pittard, G. Rauw, and Y. Nazé. "Search for non-thermal X-ray emission in the colliding wind binary Cygnus OB2 #8A." Astronomy & Astrophysics 636 (April 2020): A109. http://dx.doi.org/10.1051/0004-6361/201936735.

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Aims. Cyg OB2 #8A is a massive O-type binary displaying strong non-thermal radio emission. Owing to the compactness of this binary, emission of non-thermal X-ray photons via inverse Compton scattering is expected. Methods. We first revised the orbital solution for Cyg OB2 #8A using new optical spectra. We then reduced and analysed X-ray spectra obtained with XMM-Newton, Swift, INTEGRAL, and NuSTAR. Results. The analysis of the XMM-Newton and Swift data allows us to better characterise the X-ray emission from the stellar winds and colliding winds region at energies below 10 keV. We confirm the
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Volpi, Delia, Ronny Blomme, Michael De Becker, and Gregor Rauw. "Non-thermal radio emission from colliding-wind binaries: modelling Cyg OB2 No. 8A and No. 9." Proceedings of the International Astronomical Union 6, S272 (2010): 638–39. http://dx.doi.org/10.1017/s1743921311011689.

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AbstractSome OB stars show variable non-thermal radio emission. The non-thermal emission is due to synchrotron radiation that is emitted by electrons accelerated to high energies. The electron acceleration occurs at strong shocks created by the collision of radiatively-driven stellar winds in binary systems. Here we present results of our modelling of two colliding wind systems: Cyg OB2 No. 8A and Cyg OB2 No. 9.
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Fenech, D., J. Morford, and R. Prinja. "Non-thermal emission in Cyg OB2." Proceedings of the International Astronomical Union 12, S316 (2015): 139–40. http://dx.doi.org/10.1017/s174392131601187x.

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AbstractWe report here on the first results from the Cyg OB2 Radio Survey (COBRaS), which is a UCL-led e-MERLIN legacy project to provide a deep-field radio mapping of the Cygnus OB2 association. The project has been awarded a total allocation of 252 hours at C-band (5 GHz) and 42 hours at L-band (1.6 GHz) to image the core of the cluster.We discuss in particular the presence of non-thermal radio emission at 20 cm (L-band), and its potential as a highly efficient way to identify binaries via single-epoch observations, particularly for colliding-wind binaries. COBRaS data will provide a powerfu
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Kumsiashvili, M. I., K. B. Chargeishvili, and E. B. Janiashvili. "UBV photoelectric observations of Cyg OB2 No. 5 (V729 Cyg)." Astrophysics 55, no. 2 (2012): 193–98. http://dx.doi.org/10.1007/s10511-012-9227-8.

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Bica, E., Ch Bonatto, and C. M. Dutra. "Does Cyg OB2 harbour any open cluster?" Astronomy & Astrophysics 405, no. 3 (2003): 991–98. http://dx.doi.org/10.1051/0004-6361:20030700.

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Knödlseder, Jürgen. "Cygnus OB2 at all wavelengths." Symposium - International Astronomical Union 212 (2003): 505–14. http://dx.doi.org/10.1017/s0074180900212709.

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The Cygnus X region is one of the most nearby star formation regions within our Galaxy, that is recognised by prominent emission throughout the entire electromagnetic spectrum, from radio to gamma-ray waves. The centre is populated by the peculiar stellar cluster Cyg OB2, traditionally classified as OB association, but in the light of modern data more likely the prototype of a young globular cluster within our own Galaxy. Heavily shredded by dense molecular clouds this object has been less thoroughly studied than other, more distant star formation complexes in the Milky Way. I will review our
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Morford, Jack, Raman Prinja, and Danielle Fenech. "e-MERLIN Radio Continuum Measurements of OB Star Winds in CYG OB2." Proceedings of the International Astronomical Union 12, S316 (2015): 169–70. http://dx.doi.org/10.1017/s1743921315006882.

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AbstractHere, we report on the first results from the e-MERLIN Cyg OB2 Radio Survey (COBRaS), which is designed to exploit e-MERLIN’s enhanced capabilities to conduct deep-field mapping of the tremendously rich Cyg OB2 association. The project aims to deliver the most detailed radio census of the most massive OB association in the northern hemisphere. There exists considerable evidence for clumping in the winds of hot stars, which has hugely important consequences for mass-loss determinations. The amount of mass lost from a massive star is a crucial parameter required for stellar and cluster e
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Prinja, Raman K., and Danielle Fenech. "The e-MERLIN Cyg OB2 radio survey (COBRaS)." Proceedings of the International Astronomical Union 6, S272 (2010): 306–7. http://dx.doi.org/10.1017/s1743921311010696.

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AbstractThe e-MERLIN Cyg OB2 Radio Survey (COBRaS) is designed to exploit e-MERLIN's enhanced capabilities to conduct uniquely probing, targeted deep-field mapping of the massive Cyg OB2 association in our Galaxy. The project aims to deliver (between 2010 to 2013) the most detailed radio census for the most massive OB association in the northern hemisphere, offering direct comparison to not only massive clusters in general, but also young globular clusters and super star clusters. With the COBRaS Legacy project we will assemble a uniform dataset of lasting value that is critical for advancing
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Ченцов, Е. Л., В. Г. Клочкова, В. Е. Панчук, М. В. Юшкин та Д. С. Насонов. "Спектроскопия 13 массивных звезд в ассоциации Cyg OB2". Астрономический журнал 90, № 07 (2013): 576–97. http://dx.doi.org/10.7868/s0004629913070013.

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Dissertations / Theses on the topic "Cyg OB2"

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Huenemoerder, David, Lidia M. Oskinova, Richard Ignace, et al. "A Deep X-ray Look at a Very Massive Star: HETGS Spectroscopy of the Blue Hypergiant Cyg OB2-12 (HIP 101364)." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/2698.

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We have obtained a Chandra/HETGS spectrum of one of the most massive and luminous stars in the Galaxy: the blue hypergiant Cyg OB2-12 (HIP 101364, spectral type B3 Ia+). This is the first measurement at high resolution of X-ray spectral lines in a blue hypergiant and allows comparison of X-ray properties between massive stars at different but related evolutionary stages: O-type supergiants, luminous blue variables, Wolf-Rayet stars, and blue hypergiants stars. The new data provide a look at how the most massive stars shed mass during their pre-supernova evolution. We find that In Cyg OB2-12 th
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Oskinova, Lidia M., David P. Huenemoerder, Wolf-Rainer Hamann, et al. "On the Binary Nature of Massive Blue Hypergiants: High-resolution X-Ray Spectroscopy Suggests That Cyg OB2 12 is a Colliding Wind Binary - IOPscience." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etsu-works/2688.

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The blue hypergiant Cyg OB2 12 (B3Ia+) is a representative member of the class of very massive stars in a poorly understood evolutionary stage. We obtained its high-resolution X-ray spectrum using the Chandra observatory. PoWR model atmospheres were calculated to provide realistic wind opacities and to establish the wind density structure. We find that collisional de-excitation is the dominant mechanism depopulating the metastable upper levels of the forbidden lines of the He-like ions Si xivand Mg xii. Comparison between the model and observations reveals that X-ray emission is produced in a
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Martin, Pierrick. "La vie et la mort des étoiles massives révélées par l'observation des raies gamma nucléaires grâce au spectromètre INTEGRAL/SPI." Phd thesis, Université Paul Sabatier - Toulouse III, 2008. http://tel.archives-ouvertes.fr/tel-00358223.

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L'objectif de cette thèse est de fournir puis d'exploiter des contraintes observationnelles relatives aux étoiles massives et à leurs explosions de supernova. Pour cela, nous nous intéressons à la signature de leur activité de nucléosynthèse et plus particulièrement au rayonnement de décroissance de plusieurs isotopes radioactifs produits et libérés à divers stades de leur existence : le 44Ti, l'26Al et le 60Fe. Grâce au spectromètre haute-résolution SPI embarqué sur l'observatoire spatial INTEGRAL, nous avons pu caractériser l'émission de raies gamma associée à la décroissance de ces trois ra
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Guettai, Abdelbaki. "aDieu chez C.G. Jung." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq25601.pdf.

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Landers, Miguel. "Isolement d'îlots CpG différentiellement méthylés." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0010/NQ52168.pdf.

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Sun, Guangping. "Chromatin condensation and fragmentation caused by CUG-initiated FGF-2 in cardiomyocytes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0023/MQ51803.pdf.

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Kouri, Kimberly. "Genetic characterization and molecular evolution of the cag pathogenicity island of Helicobacter pylori." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0029/MQ64384.pdf.

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Dipchand, June S. "An investigation into the effects of CNG-gasoline operation on EGO sensor behavior and deterioration." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ63118.pdf.

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Wright, Robert S. G. "In my father's house, C.G. Jung's Memories, dreams, reflections : a son in search of father." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0021/NQ45199.pdf.

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Dick, Scott. "Recombinant lysine:N§6-hydroxylase, conformational response to Cys --> Ala substitutions and interaction with its ligands." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ60531.pdf.

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Books on the topic "Cyg OB2"

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United States. National Aeronautics and Space Administration., ed. A deep PSPC observation of the Cyg OB2 association: Final report. National Aeronautics and Space Administration, 1995.

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United States. National Aeronautics and Space Administration., ed. A deep PSPC observation of the Cyg OB2 association: Final report. National Aeronautics and Space Administration, 1995.

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United States. National Aeronautics and Space Administration., ed. A deep PSPC observation of the Cyg OB2 association: Final report. National Aeronautics and Space Administration, 1995.

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United States. National Aeronautics and Space Administration., ed. A deep PSPC observation of the Cyg OB2 association: Final report. National Aeronautics and Space Administration, 1995.

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1916-, Bos Maarten, and Brownlie Ian, eds. Liber amicorum for the Rt. Hon. Lord Wilberforce, PC, CMG, OBE, QC. Clarendon Press, 1987.

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White, A. J. S. The Burma of `AJ': Memoirs of A.J.S. White, CMG, OBE, ICS 1922-1937. BACSA (British Association for Cemetries in South Asia), 1991.

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Kev xab thooj cov lus tsis sib haum hauv kev kawm ntawv tshwj xeeb: Ib zaj lus piav qhia rau cov niam cov txiv : cov niam cov tsiv thiab cov kws qhia ntawv txoj kev sib cog los tham txog qhov ob tog yuav tau. Consortium for Appropriate Dispute Resolution in Special Education (CADRE), 2001.

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Book chapters on the topic "Cyg OB2"

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Rodríguez, L. F., J. Cantó, A. Sarmiento, et al. "Radio and Infrared Observations of CYG OB2 No. 5." In Radio Stars. Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5420-5_19.

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De Becker, Michael, Gregor Rauw, and Jean-Pierre Swings. "On the Multiplicity of the O-Star Cyg OB2 #8A and its Contribution to the γ-Ray Source 3EG J2033+4118." In Multiwavelength Approach to Unidentified Gamma-Ray Sources. Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3881-x_29.

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Sitnik, T. G., and V. V. Pravdikova. "The Nature and Kinematics of the Emission Nebulae in the Cyg OBI Supershell." In Violent Star Formation. Cambridge University Press, 1994. http://dx.doi.org/10.1017/cbo9780511600159.004.

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Cruz, Christophe. "Use of Semantics to Manage 3D Scenes in Web Platforms." In Encyclopedia of Multimedia Technology and Networking, Second Edition. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-014-1.ch200.

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Computer graphics have widely spread out into various computer applications. After the early wire-frame computer generated images of the 1960s, spatial representation of objects improved in the 1970s with Boundary Representation (B-Rep) modeling, Constructive Solid Geometry (CSG) objects, and free-form surfaces. Realistic rendering in the 1990s, taking into account sophisticated dynamic interactions (between objects or between objects and human actors, physical interactions with light, and so on) now make 3Dscenes much better than simple 3D representations of the real world. Indeed, they are a way to conceive products (industrial products, art products, and so on) and to modify them over time, either interactively or by simulation of physical phenomena (Faux & Pratt, 1979; Foley, Van Dam, Feiner, & Hughes, 1990; Kim, Huang, & Kim, 2002). Large amounts of data can be generated from such variety of 3D-models. Because there is a wide range of models corresponding to various areas of applications (metallurgy, chemistry, seismology, architecture, arts and media, and so on) (DIS 3D Databases, 2004; Pittarello & De Faveri, 2006; SketchUp from Google, 2006), data representations vary greatly. Archiving these large amounts of information most often remains a simple storage of representations of 3D-scenes (3D images). To our knowledge, there is no efficient way to manipulate, or archive, extract, and modify scenes together with their components. These components may include geometric objects or primitives that compose scenes (3D-geometry and material aspects), geometrics transformations to compose primitives objects, or observation conditions (cameras, lights, and so on). Difficulties arise less in creating 3D-scenes, rather than in the interactive reuse of these scenes, particularly by database queries, such as via Internet. Managing 3Dscenes (e.g., querying a database of architectural scenes by the content, modifying given parameters on a large scale, or performing statistics) remains difficult. This implies that DBMS should use the data structures of the 3D-scene models. Unfortunately, such data structures are often of different or exclusive standards. Indeed, many “standards” exist in computer graphics. They are often denoted by extensions of data files. Let us mention, as examples, 3dmf (Apple’s Quickdraw 3D), 3ds (Autodesk’s 3DStudio), dxf (AutoDesk’s AutoCAD), flt (Multigen’s ModelGen), iv ( Silicon Graphics’ Inventor ), obj ( Wavefront/Alias ), and so on. Many standardization attempts strive to reduce this multiplicity of various formats. In particular, there is Standard for the Exchange of Product model data (STEP) (Fowler, 1995), an international standard for computer representation and exchange of products data. Its goal is to describe data bound to a product as long as it evolves, independently of any particular computer system. It allows file exchanges, but also provides a basis for implementing and sharing product databases. Merging 3D information and textual information allows the definition of the project’s mock-up. As a matter of fact, 3D information describes CAD objects of the project and textual added information gives semantic information on geometries. The main issues are the sharing and the exchange of the digital mock-up. The next section explains how we use a digital mock-up to create an information system with the help of the semantic included in geometric information. Information is exchanged and shared through a Web Platform.
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Conference papers on the topic "Cyg OB2"

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Araudo, A. T., G. N. Ortiz-León, and L. F. Rodríguez. "Gamma-rays from the compact colliding wind region in Cyg OB2 ♯5." In HIGH ENERGY GAMMA-RAY ASTRONOMY: 5th International Meeting on High Energy Gamma-Ray Astronomy. AIP, 2012. http://dx.doi.org/10.1063/1.4772287.

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Melikian, N. D., V. S. Tamazian, A. A. Karapetian, and A. L. Samsonyan. "Emission objects in Cyg OB7. Flare activity variation of UV Ceti." In INTERNATIONAL WORKSHOP: BINARIES INSIDE AND OUTSIDE THE LOCAL INTERSTELLAR BUBBLE. AIP, 2012. http://dx.doi.org/10.1063/1.4718588.

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Morford, Jack. "Constraining wind clumping and mass-loss in OB stars with COBRaS: The e-MERLIN Cyg OB II Radio Survey." In 12th European VLBI Network Symposium and Users Meeting. Sissa Medialab, 2015. http://dx.doi.org/10.22323/1.230.0099.

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Sawut, Umerujan. "Development of New On-Board Diagnostic (OBD) Methods for Three-Way Catalysts Applicable to Various Driving: Examples of Application to a CNG Vehicle." In SAE 2012 International Powertrains, Fuels & Lubricants Meeting. SAE International, 2012. http://dx.doi.org/10.4271/2012-01-1676.

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d’Ambrosio, Stefano, Ezio Spessa, and Alberto Vassallo. "Methods for Specific Emission Evaluation in SI Engines Based on Calculation Procedures of Air-Fuel Ratio: Development, Assessment and Critical Comparison." In ASME 2003 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ices2003-0626.

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New computational procedures are proposed for evaluating the exhaust brake specific mass emissions of each pollutant species in IC engines. The procedures start from the chemical reaction of fuel with combustion air and, basing on the measured exhaust raw emissions THC, CH4, NOx, CO, O2, CO2, calculate the volume fractions of the compounds in the exhaust gases, including those that are not usually measured, such as water, nitrogen and hydrogen. The method also takes the effects of various fuel and combustion air compositions into account, with particular reference to different natural gas blen
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