The X Ray View Of Galaxies In Compact Groups And The Coma Cluster Infall Region
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The X Ray View Of Galaxies In Compact Groups And The Coma Cluster Infall Region
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Author : Tyler Dylan Desjardins
language : en
Publisher:
Release Date : 2014
The X Ray View Of Galaxies In Compact Groups And The Coma Cluster Infall Region written by Tyler Dylan Desjardins and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
In this thesis, we have explored what information may be gleaned from X-ray observations of galaxies in dense environments. We use X-ray observations from XMM- Newton and the Chandra X-ray Observatory, and multi-wavelength ancillary data, to investigate the X-ray emission of galaxies. First, we study the distribution and properties of the intragroup diffuse X-ray emission in compact groups (CGs) of galaxies. From a sample of 19 CGs, we find the morphology of hot gas in low-mass groups is varied, and most systems have hot gas (if any) associated with only individual members. The galaxy-linked hot gas is coupled with high star formation rates (SFRs), while only CGs with high baryonic masses have substantial hot gas linked to the group environment. It is high-mass CGs that also agree well with the observed scaling relations between diffuse X-ray luminosity (LX), gas temperature, and velocity dispersion predicted and observed in galaxy clusters, indicating that the hot gas in only massive CGs is virialized. We also investigate the relations between LX, SFR, and stellar mass from individual members of CGs and the infall region of the nearby Coma galaxy cluster, which is the only environment that has a mid-infrared galaxy color distribution similar to CGs. The Coma galaxies agree with the scaling relations between LX, SFR, and stellar mass from the literature within uncertainties, while the CG members often show an X-ray excess. We also used our multi-wavelength observations to identify active galaxies in the Coma infall sample and find that the fraction of active galaxies is similar to the CG environment. From our observations of the diffuse X-ray emission in CGs, we find it unlikely that the intragroup hot gas is responsible for the rapid transformation of galaxies from star-forming to quiescent. While the fraction of nuclear activity in Coma infall and CG galaxies is similar, which may reflect the influence of multi-galaxy gravitational interactions, the X-ray emission from individual galaxies in the two environments is also markedly different.
Cosmological Aspects Of X Ray Clusters Of Galaxies
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Author : W.C. Seitter
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Cosmological Aspects Of X Ray Clusters Of Galaxies written by W.C. Seitter and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The NATO Advanced Study Institute "Cosmological Aspects of X-Ray Clus ters of Galaxies" took place in Vel en , Westphalia, Germany, from June 6 to June 18, 1993. It addressed the fruitful union of two topics, cosmology and X-ray clus ters, both of which carry substantial scientific weight at the beginning of the last decenium of the last century in the second millenium of our era. The so far largest X-ray "All-Sky Survey", observed by the ROSAT X-ray satel lite, and ROSAT's deep pointed observations, have considerably enlarged the base of X-ray astronomy, particularly concerning extragalactic sources. Cosmology has gained significant impetus from the large optical direct and spectroscopic surveys, based on high quality 2-dimensional receivers at large telescopes and powerful scan ning devices, harvesting the full information 1 content from the older technique of employing photographic plates. Radioastronomy and IR-astronomy with IRAS, as well as r-astronomy with GRO, continue and strengthen the role of extragalactic research. The rapidly growing computer power in data reduction and data storage facilities support the evolution towards large-number statistics. A most significant push was given to early cosmology by the needs of physics in trying to unravel the nature of forces which govern our material world. The topic of the ASI was chosen because it opens new vistas on this for ever new problem: the universe. Clusters of galaxies probe large-scale matter distributions and the structure of space-time.
Groups And Clusters Of Galaxies
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Author : Willem Bijleveld
language : en
Publisher:
Release Date : 1984
Groups And Clusters Of Galaxies written by Willem Bijleveld and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Galaxies categories.
X Ray Substructure In A Flux Limited Catalog Of Clusters Of Galaxies
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Author : David Samuel Davis
language : en
Publisher:
Release Date : 1994
X Ray Substructure In A Flux Limited Catalog Of Clusters Of Galaxies written by David Samuel Davis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Astrophysics categories.
The Physical Characteristics Of The X Ray Emitting Gas In Clusters Of Galaxies And Constraints On Dark Matter
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Author : Mark Jeffrey Henriksen
language : en
Publisher:
Release Date : 1985
The Physical Characteristics Of The X Ray Emitting Gas In Clusters Of Galaxies And Constraints On Dark Matter written by Mark Jeffrey Henriksen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Galaxies categories.
Clusters And Groups Of Galaxies
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Author : F. Mardirossian
language : en
Publisher: Springer
Release Date : 1984-07-31
Clusters And Groups Of Galaxies written by F. Mardirossian and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984-07-31 with Science categories.
International Meeting held in Trieste, Italy, September 13-16, 1983
X Ray Clusters Of Galaxies
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Author : John David McKee
language : en
Publisher:
Release Date : 1983
X Ray Clusters Of Galaxies written by John David McKee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Galaxies categories.
Clustering In The Universe
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Author : Daniel Gerbal
language : en
Publisher: Atlantica Séguier Frontières
Release Date : 1983
Clustering In The Universe written by Daniel Gerbal and has been published by Atlantica Séguier Frontières this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Cosmography categories.
High Energy Astrophysics
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Author : Malcolm S. Longair
language : en
Publisher: Cambridge University Press
Release Date : 2011-02-03
High Energy Astrophysics written by Malcolm S. Longair and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-02-03 with Science categories.
Providing students with an in-depth account of the astrophysics of high energy phenomena in the Universe, the third edition of this well-established textbook is ideal for advanced undergraduate and beginning graduate courses in high energy astrophysics. Building on the concepts and techniques taught in standard undergraduate courses, this textbook provides the astronomical and astrophysical background for students to explore more advanced topics. Special emphasis is given to the underlying physical principles of high energy astrophysics, helping students understand the essential physics. The third edition has been completely rewritten, consolidating the previous editions into one volume. It covers the most recent discoveries in areas such as gamma-ray bursts, ultra-high energy cosmic rays and ultra-high energy gamma rays. The topics have been rearranged and streamlined to make them more applicable to a wide range of different astrophysical problems.
X Ray Emission From Clusters Of Galaxies
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Author : Craig L. Sarazin
language : en
Publisher: Cambridge University Press
Release Date : 1988-03-17
X Ray Emission From Clusters Of Galaxies written by Craig L. Sarazin and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988-03-17 with Science categories.
First published in 1988, this book is a comprehensive survey of the astrophysical characteristics of the hot gas which pervades clusters of galaxies. In our universe, clusters of galaxies are the largest organised structures. Typically they comprise hundreds of galaxies moving through a region of space ten million light years in diameter. The volume between the galaxies is filled with gas having a temperature of 100 million degrees. This material is a strong source of cosmic X-rays. Dr Sarazin describes the theoretical description of the origin, dynamics, and physical state of the cluster gas. Observations by radio and optical telescopes are also summarised. This account is addressed to professional astronomers and to graduate students. It is an exhaustive summary of a rapidly expanding field of research in modern astrophysics.