Gas Accretion Onto Galaxies

Author : Andrew Fox,Romeel Davé
Publisher : Springer
Page : 373 pages
File Size : 50,9 Mb
Release : 2017-03-23
Category : Science
ISBN : 9783319525129

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Gas Accretion onto Galaxies by Andrew Fox,Romeel Davé Pdf

This edited volume presents the current state of gas accretion studies from both observational and theoretical perspectives, and charts our progress towards answering the fundamental yet elusive question of how galaxies get their gas. Understanding how galaxies form and evolve has been a central focus in astronomy for over a century. These studies have accelerated in the new millennium, driven by two key advances: the establishment of a firm concordance cosmological model that provides the backbone on which galaxies form and grow, and the recognition that galaxies grow not in isolation but within a “cosmic ecosystem” that includes the vast reservoir of gas filling intergalactic space. This latter aspect in which galaxies continually exchange matter with the intergalactic medium via inflows and outflows has been dubbed the “baryon cycle”. The topic of this book is directly related to the baryon cycle, in particular its least well constrained aspect, namely gas accretion. Accretion is a rare area of astrophysics in which the basic theoretical predictions are established, but the observations have been as yet unable to verify the expectations. Accretion has long been seen around the Milky Way in so-called High Velocity Clouds, but detecting accretion even around nearby galaxies has proved challenging; its multi-phase nature requires sensitive observations across the electromagnetic spectrum for full characterization. A promising approach involves looking for kinematic signatures, but accretion signatures are often confused with internal motions within galaxies. Accretion studies therefore touch a wide range of astrophysical processes, and hence a wide cross-section of the astronomical community. As observational facilities are finally able to access the wavelength ranges and depths at which accretion processes may be manifest, the time is right to survey these multiple lines of investigation and determine the state of the field in accretion studies of the baryon cycle.

Author : Hsiang-Hsu Wang
Publisher : Unknown
Page : 0 pages
File Size : 40,5 Mb
Release : 2010
Category : Electronic
ISBN : OCLC:724503851

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Gas Evolution in Disk Galaxies by Hsiang-Hsu Wang Pdf

Author : Maurizio Falanga,Tomaso Belloni,Piergiorgio Casella,Marat Gilfanov,Peter Jonker,Andrew King
Publisher : Springer
Page : 489 pages
File Size : 48,5 Mb
Release : 2014-10-28
Category : Science
ISBN : 9781493922277

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The Physics of Accretion onto Black Holes by Maurizio Falanga,Tomaso Belloni,Piergiorgio Casella,Marat Gilfanov,Peter Jonker,Andrew King Pdf

Provides a comprehensive summary on the physical models and current theory of black hole accretion, growth and mergers, in both the supermassive and stellar-mass cases. This title reviews in-depth research on accretion on all scales, from galactic binaries to intermediate mass and supermassive black holes. Possible future directions of accretion are also discussed. The following main themes are covered: a historical perspective; physical models of accretion onto black holes of all masses; black hole fundamental parameters; and accretion, jets and outflows. An overview and outlook on the topic is also presented. This volume summarizes the status of the study of astrophysical black hole research and is aimed at astrophysicists and graduate students working in this field. Originally published in Space Science Reviews, Vol 183/1-4, 2014.

Author : Claude R. Canizares,Gordon C. Stewart,A. C. Fabian,Massachusetts Institute of Technology. Center for Space Research
Publisher : Unknown
Page : 42 pages
File Size : 41,7 Mb
Release : 1982
Category : Electronic
ISBN : OCLC:23239442

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Radiative Accretion of Intracluster Gas Onto Dominant Galaxies in Poor Clusters by Claude R. Canizares,Gordon C. Stewart,A. C. Fabian,Massachusetts Institute of Technology. Center for Space Research Pdf

Author : F. Meyer,Wolfgang J. Duschl,Juhan Frank,Emmi Meyer-Hofmeister
Publisher : Springer Science & Business Media
Page : 471 pages
File Size : 51,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400910379

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Theory of Accretion Disks by F. Meyer,Wolfgang J. Duschl,Juhan Frank,Emmi Meyer-Hofmeister Pdf

With the advent of space observatories and modern developments in ground based astronomy and concurrent progress in the theoretical understanding of these observations it has become clear that accretion of material on to compact objects is an ubiquitous mechanism powering very diverse astrophysical sources ranging in size and luminosity by many orders of magnitude. A problem common to these systems is that the material accreted must in general get rid of its angular momentum and this leads to the formation of an Accretion Disk which allows angular momentum re-distribution and converts potential energy into radiation with an efficiency which can be higher than the nuclear burning yield. These systems range in size from quasars and active galactic nuclei to accretion disks around forming stars and the early solar system and to compact binaries such as cataclysmic variables and low-mass X-ray binaries. Other objects that should be mentioned in this context are 88433, the black hole binary candidates, and possibly gamma-ray burst sources. Observations of these systems have provided important constraints for theoretical accretion disk models on widely differing scales, lumi nosities, mass-transfer rates and physical environments.

Author : Joss Bland-Hawthorn,Kenneth Freeman,Francesca Matteucci
Publisher : Springer Science & Business Media
Page : 231 pages
File Size : 55,6 Mb
Release : 2014-02-11
Category : Science
ISBN : 9783642417207

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The Origin of the Galaxy and Local Group by Joss Bland-Hawthorn,Kenneth Freeman,Francesca Matteucci Pdf

This volume contains the updated and expanded lecture notes of the 37th Saas-Fee Advanced Course organised by the Swiss Society for Astrophysics and Astronomy. It offers the most comprehensive and up to date review of one of the hottest research topics in astrophysics - how our Milky Way galaxy formed. Joss Bland-Hawthorn & Ken Freeman lectured on Near Field Cosmology - The Origin of the Galaxy and the Local Group. Francesca Matteucci’s chapter is on Chemical evolution of the Milky Way and its Satellites. As designed by the SSAA, books in this series – and this one too – are targeted at graduate and PhD students and young researchers in astronomy, astrophysics and cosmology. Lecturers and researchers entering the field will also benefit from the book.

Author : Andrea Cimatti,Filippo Fraternali,Carlo Nipoti
Publisher : Cambridge University Press
Page : 587 pages
File Size : 52,7 Mb
Release : 2019-10-17
Category : Science
ISBN : 9781107134768

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Introduction to Galaxy Formation and Evolution by Andrea Cimatti,Filippo Fraternali,Carlo Nipoti Pdf

A comprehensive examination of nearly fourteen billion years of galaxy formation and evolution, from primordial gas to present-day galaxies.

Author : International Astronomical Union. Symposium,Bengt Strömgren
Publisher : Cambridge University Press
Page : 542 pages
File Size : 44,8 Mb
Release : 2009-04-16
Category : Science
ISBN : 0521889855

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The Galaxy Disk in Cosmological Context (IAU S254) by International Astronomical Union. Symposium,Bengt Strömgren Pdf

The paradigm of a dark energy- and dark matter-dominated Universe, with the hierarchical merger scenario for the formation of galaxies, has scored impressive successes in matching the observed Universe. However, the theory fails to explain the difficulty in generating ordinary disk galaxies such as the Milky Way, suggesting that some important physics must be missing in current models. IAU Symposium 254 was organized to address this question, gathering researchers from an unusually broad range of fields, from cosmology to interstellar matter, and the formation and evolution of stars. High-class reviews, lectures and posters combine to define the frontiers in the field and point the way to new avenues of research. This volume presents a unique set of succinct overviews illuminating the full range of topics in this very active field. It also honors Danish astrophysicist Bengt Strömgren (1908-1987), who laid much of the foundation for this entire field.

Author : Francoise Combes
Publisher : John Wiley & Sons
Page : 290 pages
File Size : 45,9 Mb
Release : 2021-04-27
Category : Science
ISBN : 9781789450125

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Galaxies by Francoise Combes Pdf

Galaxies are vast ensembles of stars, gas and dust, embedded in dark matter halos. They are the basic building blocks of the Universe, gathered in groups, clusters and super-clusters. They exist in many forms, either as spheroids or disks. Classifications, such as the Hubble sequence (based on mass concentration and gas fraction) and the colormagnitude diagram (which separates a blue cloud from a red sequence) help to understand their formation and evolution. Galaxies spend a large part of their lives in the blue cloud, forming stars as spiral or dwarf galaxies. Then, via a mechanism that is still unclear, they stop forming stars and quietly end in the red sequence, as spheroids. This transformation may be due to galaxy interactions, or because of the feedback of active nuclei, through the energy released by their central super-massive black holes. These mechanisms could explain the history of cosmic star formation, the rate of which was far greater in the first half of the Universes life. Galaxies delves into all of these surrounding subjects in six chapters written by dedicated, specialist astronomers and researchers in the field, from their numerical simulations to their evolutions.

Author : Abraham Loeb,Steven R. Furlanetto
Publisher : Princeton University Press
Page : 560 pages
File Size : 48,7 Mb
Release : 2013-01-15
Category : Science
ISBN : 9781400845606

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The First Galaxies in the Universe by Abraham Loeb,Steven R. Furlanetto Pdf

This book provides a comprehensive, self-contained introduction to one of the most exciting frontiers in astrophysics today: the quest to understand how the oldest and most distant galaxies in our universe first formed. Until now, most research on this question has been theoretical, but the next few years will bring about a new generation of large telescopes that promise to supply a flood of data about the infant universe during its first billion years after the big bang. This book bridges the gap between theory and observation. It is an invaluable reference for students and researchers on early galaxies. The First Galaxies in the Universe starts from basic physical principles before moving on to more advanced material. Topics include the gravitational growth of structure, the intergalactic medium, the formation and evolution of the first stars and black holes, feedback and galaxy evolution, reionization, 21-cm cosmology, and more. Provides a comprehensive introduction to this exciting frontier in astrophysics Begins from first principles Covers advanced topics such as the first stars and 21-cm cosmology Prepares students for research using the next generation of large telescopes Discusses many open questions to be explored in the coming decade

Author : Nickolay Y. Gnedin,Simon C. O. Glover,Ralf S. Klessen,Volker Springel
Publisher : Springer
Page : 365 pages
File Size : 46,8 Mb
Release : 2015-09-09
Category : Science
ISBN : 9783662478905

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Star Formation in Galaxy Evolution: Connecting Numerical Models to Reality by Nickolay Y. Gnedin,Simon C. O. Glover,Ralf S. Klessen,Volker Springel Pdf

This book contains the elaborated and updated versions of the 24 lectures given at the 43rd Saas-Fee Advanced Course. Written by four eminent scientists in the field, the book reviews the physical processes related to star formation, starting from cosmological down to galactic scales. It presents a detailed description of the interstellar medium and its link with the star formation. And it describes the main numerical computational techniques designed to solve the equations governing self-gravitating fluids used for modelling of galactic and extra-galactic systems. This book provides a unique framework which is needed to develop and improve the simulation techniques designed for understanding the formation and evolution of galaxies. Presented in an accessible manner it contains the present day state of knowledge of the field. It serves as an entry point and key reference to students and researchers in astronomy, cosmology, and physics.

Author : Isaac Shlosman
Publisher : Cambridge University Press
Page : 534 pages
File Size : 52,8 Mb
Release : 2003-10-30
Category : Science
ISBN : 0521543304

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Mass-Transfer Induced Activity in Galaxies by Isaac Shlosman Pdf

How gas flows and starbursts light up active galaxies.

Author : I. Pérez-Fournon
Publisher : Cambridge University Press
Page : 302 pages
File Size : 55,8 Mb
Release : 2003-03-20
Category : Science
ISBN : 0521825911

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Galaxies at High Redshift by I. Pérez-Fournon Pdf

This volume presents lectures of the XI Canary Islands Winter School of Astrophysics written by experts in the field.

Author : Francesca Matteucci
Publisher : Springer Science & Business Media
Page : 237 pages
File Size : 49,5 Mb
Release : 2012-01-05
Category : Science
ISBN : 9783642224904

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Chemical Evolution of Galaxies by Francesca Matteucci Pdf

The term “chemical evolution of galaxies” refers to the evolution of abundances of chemical species in galaxies, which is due to nuclear processes occurring in stars and to gas flows into and out of galaxies. This book deals with the chemical evolution of galaxies of all morphological types (ellipticals, spirals and irregulars) and stresses the importance of the star formation histories in determining the properties of stellar populations in different galaxies. The topic is approached in a didactical and logical manner via galaxy evolution models which are compared with observational results obtained in the last two decades: The reader is given an introduction to the concept of chemical abundances and learns about the main stellar populations in our Galaxy as well as about the classification of galaxy types and their main observables. In the core of the book, the construction and solution of chemical evolution models are discussed in detail, followed by descriptions and interpretations of observations of the chemical evolution of the Milky Way, spheroidal galaxies, irregular galaxies and of cosmic chemical evolution. The aim of this book is to provide an introduction to students as well as to amend our present ideas in research; the book also summarizes the efforts made by authors in the past several years in order to further future research in the field.

Author : Johan H. Knapen,Janice C. Lee,Armando Gil de Paz
Publisher : Springer
Page : 362 pages
File Size : 46,8 Mb
Release : 2017-07-09
Category : Science
ISBN : 9783319565705

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Outskirts of Galaxies by Johan H. Knapen,Janice C. Lee,Armando Gil de Paz Pdf

This book consists of invited reviews written by world-renowned experts on the subject of the outskirts of galaxies, an upcoming field which has been understudied so far. These regions are faint and hard to observe, yet hide a tremendous amount of information on the origin and early evolution of galaxies. They thus allow astronomers to address some of the most topical problems, such as gaseous and satellite accretion, radial migration, and merging. The book is published in conjunction with the celebration of the end of the four-year DAGAL project, an EU-funded initial training network, and with a major international conference on the topic held in March 2016 in Toledo. It thus reflects not only the views of the experts, but also the scientific discussions and progress achieved during the project and the meeting. The reviews in the book describe the most modern observations of the outer regions of our own Galaxy, and of galaxies in the local and high-redshift Universe. They tackle disks, haloes, streams, and accretion as observed through deep imaging and spectroscopy, and guide the reader through the various formation and evolution scenarios for galaxies. The reviews focus on the major open questions in the field, and explore how they can be tackled in the future. This book provides a unique entry point into the field for graduate students and non-specialists, and serves as a reference work for researchers in this exciting new field.