Using Quasar Absorption Lines To Probe Cold Gas In High Redshift Galaxies
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Using Quasar Absorption Lines To Probe Cold Gas In High Redshift Galaxies
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Author : Siwei Zou
language : en
Publisher:
Release Date : 2018
Using Quasar Absorption Lines To Probe Cold Gas In High Redshift Galaxies written by Siwei Zou and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Probing Galaxies Through Quasar Absorption Lines Iau C199
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Author : International Astronomical Union. Colloquium
language : en
Publisher: Cambridge University Press
Release Date : 2005-12
Probing Galaxies Through Quasar Absorption Lines Iau C199 written by International Astronomical Union. Colloquium 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 2005-12 with Science categories.
Review of recent research in the field of quasar absorption line systems.
Multi Phase Modeling Of Intervening Quasar Absorption Line Systems At Z
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Author : Jackson Norris
language : en
Publisher:
Release Date : 2019
Multi Phase Modeling Of Intervening Quasar Absorption Line Systems At Z written by Jackson Norris and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
To understand the formation and evolution of galaxies, it is essential to understand the gas that exists in the vicinity of galaxies. Mg II absorption systems probe the circumgalactic medium (CGM) around galaxies and can provide hints to the nature of the gas. To fully understand the complex structure of the CGM, it is necessary to investigate not only low-ionization transitions such as those of Mg II, but also transition lines associated with more diffuse high-ionization material.We report our analysis of six intervening quasar absorption line systems, which probe the CGM at redshifts 0.4
Structure And Evolution Of The Intergalactic Medium From Qso Absorption Line Systems
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Author : Patrick Petitjean
language : en
Publisher: Atlantica Séguier Frontières
Release Date : 1997
Structure And Evolution Of The Intergalactic Medium From Qso Absorption Line Systems written by Patrick Petitjean 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 1997 with Absorption spectra categories.
Gravitational Lensing An Astrophysical Tool
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Author : Frederic Courbin
language : en
Publisher: Springer
Release Date : 2008-01-11
Gravitational Lensing An Astrophysical Tool written by Frederic Courbin and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-01-11 with Science categories.
Gravitational lensing is by now sufficiently well understood that it can be used as a tool of investigation in other astrophysical areas. Applications include the determination of the Hubble constant, probing the dark matter context of galaxies and the mapping of the universe to the identification of otherwise invisible large-scale structures. Each chapter of the book covers in a self-contained manner a subfield of gravitational lensing, with the double aim of describing in a simple way the basics of the theory and of reviewing the most recent developments as well as applications foreseen in the near future. The book will thus be particularly useful as a high-level textbook for nonspecialist researchers and advanced students wishing to become familiar with the field all the way up to the forefront of research.
The Physical Conditions Of Atomic Gas At High Redshift
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Author : Marcel Neeleman
language : en
Publisher:
Release Date : 2015
The Physical Conditions Of Atomic Gas At High Redshift written by Marcel Neeleman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
In this thesis we provide insight into the chemical composition, physical conditions and cosmic distribution of atomic gas at high redshift. We study this gas in absorption against bright background quasars in absorption systems known as Damped Ly-alpha Systems (DLAs). These systems contain the bulk of the atomic gas at high redshift and are the likely progenitors of modern-day galaxies. In Chapter 2, we find that the atomic gas in DLAs obeys a mass-metallicity relationship that is similar to the mass-metallicity relationship seen in star-forming galaxies. The evolution of this relationship is linear with redshift, allowing for a planar equation to accurately describe this evolution, which provides a more stringent constraint on simulations modeling DLAs. Furthermore, the concomitant evolution of the mass-metallicity relationship of atomic gas and star-forming galaxies suggests an intimate link between the two. We next use a novel way to measure the physical conditions of the gas by using fine-structure line ratios of singly ionized carbon and silicon. By measuring the density of the upper and lower level states, we are able to determine the temperature, hydrogen density and electron density of the gas. We find that the conditions present in this high redshift gas are consistent with the conditions we see in the local interstellar medium (ISM). A few absorbers have higher than expected pressure, which suggests that they probe the ISM of star-forming galaxies. Finally in Chapter 4, we measure the cosmic neutral hydrogen density at redshifts below 1.6. Below this redshift, the Ly-alpha line of hydrogen is absorbed by the atmosphere, making detection difficult. Using the archive of the Hubble Space Telescope, we compile a comprehensive list of quasars for a search of DLAs at redshift below 1.6. We find that the incidence rate of DLAs and the cosmic neutral hydrogen density is smaller than previously measured, but consistent with the values both locally and at redshifts of about 2. Altogether, these results improve our understanding of atomic gas at high redshift and help illuminate how this important component shapes the galaxies we see today.
Chemical Evolution From Zero To High Redshift
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Author : Jeremy Walsh
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Chemical Evolution From Zero To High Redshift written by Jeremy Walsh 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 2013-06-29 with Science categories.
A New Science Strategy For Space Astronomy And Astrophysics
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1997-07-06
A New Science Strategy For Space Astronomy And Astrophysics written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-07-06 with Science categories.
Literature 1997 Part 1
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Author : Astronomisches Rechen-InstitutARI
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
Literature 1997 Part 1 written by Astronomisches Rechen-InstitutARI 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 2013-11-11 with Science categories.
Astronomy and Astrophysics Abstracts is devoted to the recording, summarizing and indexing of astronomical publications throughout the world. Two volumes are scheduled to appear per year. Volume 67 records 10,903 papers covering besides the classical fields of astronomy and astrophysics such matters as space flights related to astronomy, lunar and planetary probes and satellites, meteorites and interplanetary matter, X rays and cosmic rays, quasars and pulsars. The abstracts are classified under more than one hundred subject categories thus permitting quick surveying of the bulk of material published on the same topic within six months. For instance, this volume records 119 papers on minor planets, 155 papers on supernovae, and 554 papers on cosmology.
Quasar Absorption Lines As Probes For High Redshift Superclusters
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Author : Steven E. Persh
language : en
Publisher:
Release Date : 1994
Quasar Absorption Lines As Probes For High Redshift Superclusters written by Steven E. Persh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.