Dynamical Evolution Of Disk Galaxies

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Dynamical Evolution of Disk Galaxies

Frank Hohl
Dynamical Evolution of Disk Galaxies Book PDF

Author : Frank Hohl
Publisher : Unknown
Page : 116 pages
File Size : 50,8 Mb
Release : 1970
Category : Galaxies
ISBN : NASA:31769000423643

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Dynamical Evolution of Disk Galaxies by Frank Hohl Pdf

A computer model for isolated disks of stars is presented and is used to study the self-consistent motion of large numbers of point masses as they move in the plane of the galactic disk. The Control Data 6600 computer system at the Langley Research Center was used to integrate the equations of motion for each star for systems containing from 50,000 to 200,000 stars. Any initially cold balanced disk was found to be violently unstable. A sufficient amount of velocity dispersion will stabilize all small-scale disturbances. However, most disks investigated were found to be unstable against slowly growing long-wavelength modes, and after about two rotations the disks tended to assume a bar-shaped structure. It was also found that the final mass distribution for most disks could be closely approximated by an exponential variation irrespective of the initial mass distribution. To study the development of spiral structure, the model was modified to include a fixed central force similar to that in the Schmidt model of the Galaxy. The mass of the stars in the disk was taken to be from 5 to 50 percent of the total mass of the Galaxy. The evolution of a number of initial distributions of stars was investigated. The results of the calculation gave a velocity dispersion for the disk stars which was about 50 percent larger than the value of about 30 km/sec found from observation of stars in the solar neighborhood. For some of the disks investigated, a pronounced spiral structure remained even after 8.5 rotations.

Dynamical Evolution of Galaxies

Xiaolei Zhang
Dynamical Evolution of Galaxies Book PDF

Author : Xiaolei Zhang
Publisher : Walter de Gruyter GmbH & Co KG
Page : 337 pages
File Size : 46,9 Mb
Release : 2017-12-04
Category : Science
ISBN : 9783110527421

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Dynamical Evolution of Galaxies by Xiaolei Zhang Pdf

This research monograph presents a new dynamical framework for the study of secular morphological evolution of galaxies along the Hubble sequence. Classical approaches based on Boltzmann’s kinetic equation, as well as on its moment-equation descendants the Euler and Navier-Stokes fluid equations, are inadequate for treating the maintenance and long-term evolution of systems containing self-organized structures such as galactic density-wave modes. A global and synthetic approach, incorporating correlated fluctuations of the constituent particles during a nonequilibrium phase transition, is adopted to supplement the continuum treatment. The cutting-edge research combining analytical, N-body simulational, and observational aspects, as well as the fundamental-physics connections it provides, make this work a valuable reference for researchers and graduate students in astronomy, astrophysics, cosmology, many-body physics, complexity theory, and other related fields. Contents Dynamical Drivers of Galaxy Evolution N-Body Simulations of Galaxy Evolution Astrophysical Implications of the Dynamical Theory Putting It All Together Concluding Remarks Appendix: Relation to Kinetics and Fluid Mechanics

Dynamical Evolution of Disk Galaxies

Frank Hohl
Dynamical Evolution of Disk Galaxies Book PDF

Author : Frank Hohl
Publisher : Unknown
Page : 116 pages
File Size : 40,6 Mb
Release : 1970
Category : Galaxies
ISBN : UIUC:30112106585380

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Dynamical Evolution of Disk Galaxies by Frank Hohl Pdf

A computer model for isolated disks of stars is presented and is used to study the self-consistent motion of large numbers of point masses as they move in the plane of the galactic disk. The Control Data 6600 computer system at the Langley Research Center was used to integrate the equations of motion for each star for systems containing from 50,000 to 200,000 stars. Any initially cold balanced disk was found to be violently unstable. A sufficient amount of velocity dispersion will stabilize all small-scale disturbances. However, most disks investigated were found to be unstable against slowly growing long-wavelength modes, and after about two rotations the disks tended to assume a bar-shaped structure. It was also found that the final mass distribution for most disks could be closely approximated by an exponential variation irrespective of the initial mass distribution. To study the development of spiral structure, the model was modified to include a fixed central force similar to that in the Schmidt model of the Galaxy. The mass of the stars in the disk was taken to be from 5 to 50 percent of the total mass of the Galaxy. The evolution of a number of initial distributions of stars was investigated. The results of the calculation gave a velocity dispersion for the disk stars which was about 50 percent larger than the value of about 30 km/sec found from observation of stars in the solar neighborhood. For some of the disks investigated, a pronounced spiral structure remained even after 8.5 rotations.

Galactic Dynamics

James Binney,Scott Tremaine
Galactic Dynamics Book PDF

Author : James Binney,Scott Tremaine
Publisher : Princeton University Press
Page : 902 pages
File Size : 50,5 Mb
Release : 2011-10-30
Category : Science
ISBN : 9781400828722

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Galactic Dynamics by James Binney,Scott Tremaine Pdf

Since it was first published in 1987, Galactic Dynamics has become the most widely used advanced textbook on the structure and dynamics of galaxies and one of the most cited references in astrophysics. Now, in this extensively revised and updated edition, James Binney and Scott Tremaine describe the dramatic recent advances in this subject, making Galactic Dynamics the most authoritative introduction to galactic astrophysics available to advanced undergraduate students, graduate students, and researchers. Every part of the book has been thoroughly overhauled, and many sections have been completely rewritten. Many new topics are covered, including N-body simulation methods, black holes in stellar systems, linear stability and response theory, and galaxy formation in the cosmological context. Binney and Tremaine, two of the world's leading astrophysicists, use the tools of theoretical physics to describe how galaxies and other stellar systems work, succinctly and lucidly explaining theoretical principles and their applications to observational phenomena. They provide readers with an understanding of stellar dynamics at the level needed to reach the frontiers of the subject. This new edition of the classic text is the definitive introduction to the field. ? A complete revision and update of one of the most cited references in astrophysics Provides a comprehensive description of the dynamical structure and evolution of galaxies and other stellar systems Serves as both a graduate textbook and a resource for researchers Includes 20 color illustrations, 205 figures, and more than 200 problems Covers the gravitational N-body problem, hierarchical galaxy formation, galaxy mergers, dark matter, spiral structure, numerical simulations, orbits and chaos, equilibrium and stability of stellar systems, evolution of binary stars and star clusters, and much more Companion volume to Galactic Astronomy, the definitive book on the phenomenology of galaxies and star clusters

Fundamentals of Galaxy Dynamics, Formation and Evolution

Ignacio Ferreras
Fundamentals of Galaxy Dynamics Formation and Evolution Book PDF

Author : Ignacio Ferreras
Publisher : UCL Press
Page : 200 pages
File Size : 50,6 Mb
Release : 2019-04-02
Category : Science
ISBN : 9781911307617

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Fundamentals of Galaxy Dynamics, Formation and Evolution by Ignacio Ferreras Pdf

Galaxies, along with their underlying dark matter halos, constitute the building blocks of structure in the Universe. Of all fundamental forces, gravity is the dominant one that drives the evolution of structures from small density seeds at early times to the galaxies we see today. The interactions among myriads of stars, or dark matter particles, in a gravitating structure produce a system with fascinating connotations to thermodynamics, with some analogies and some fundamental differences. Ignacio Ferreras presents a concise introduction to extragalactic astrophysics, with emphasis on stellar dynamics, and the growth of density fluctuations in an expanding Universe. Additional chapters are devoted to smaller systems (stellar clusters) and larger ones (galaxy clusters). Fundamentals of Galaxy Dynamics, Formation and Evolution is written for advanced undergraduates and beginning postgraduate students, providing a useful tool to get up to speed in a starting research career. Some of the derivations for the most important results are presented in detail to enable students appreciate the beauty of maths as a tool to understand the workings of galaxies. Each chapter includes a set of problems to help the student advance with the material.

Island Universes

R. S. de Jong
Island Universes Book PDF

Author : R. S. de Jong
Publisher : Springer Science & Business Media
Page : 605 pages
File Size : 44,9 Mb
Release : 2007-05-24
Category : Science
ISBN : 9781402055737

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Island Universes by R. S. de Jong Pdf

This book contains an up-to-date review of the structure and evolution of disk galaxies from both the observational and theoretical point of view. It is the proceedings of the "Island Universes" conference held at the island of Terschelling in July 2005. It brings together a broad range of aspects of disk galaxies: structure and dynamics, the latest multi-wavelength surveys, low- and high redshift observations, theory and observations.

Island Universes

R. S. de Jong
Island Universes Book PDF

Author : R. S. de Jong
Publisher : Springer
Page : 582 pages
File Size : 45,9 Mb
Release : 2011-11-29
Category : Science
ISBN : 9048111579

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Island Universes by R. S. de Jong Pdf

This book contains an up-to-date review of the structure and evolution of disk galaxies from both the observational and theoretical point of view. It is the proceedings of the "Island Universes" conference held at the island of Terschelling in July 2005. It brings together a broad range of aspects of disk galaxies: structure and dynamics, the latest multi-wavelength surveys, low- and high redshift observations, theory and observations.

Galactic Astronomy

James Binney,Michael Merrifield
Galactic Astronomy Book PDF

Author : James Binney,Michael Merrifield
Publisher : Princeton University Press
Page : 818 pages
File Size : 43,7 Mb
Release : 2021-07-13
Category : Science
ISBN : 9780691233321

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Galactic Astronomy by James Binney,Michael Merrifield Pdf

This is the definitive treatment of the phenomenology of galaxies--a clear and comprehensive volume that takes full account of the extraordinary recent advances in the field. The book supersedes the classic text Galactic Astronomy that James Binney wrote with Dimitri Mihalas, and complements Galactic Dynamics by Binney and Scott Tremaine. It will be invaluable to researchers and is accessible to any student who has a background in undergraduate physics. The book draws on observations both of our own galaxy, the Milky Way, and of external galaxies. The two sources are complementary, since the former tends to be highly detailed but difficult to interpret, while the latter is typically poorer in quality but conceptually simpler to understand. Binney and Merrifield introduce all astronomical concepts necessary to understand the properties of galaxies, including coordinate systems, magnitudes and colors, the phenomenology of stars, the theory of stellar and chemical evolution, and the measurement of astronomical distances. The book's core covers the phenomenology of external galaxies, star clusters in the Milky Way, the interstellar media of external galaxies, gas in the Milky Way, the structure and kinematics of the stellar components of the Milky Way, and the kinematics of external galaxies. Throughout, the book emphasizes the observational basis for current understanding of galactic astronomy, with references to the original literature. Offering both new information and a comprehensive view of its subject, it will be an indispensable source for professionals, as well as for graduate students and advanced undergraduates.

Galaxy Evolution: Connecting the Distant Universe with the Local Fossil Record

Monique Spite
Galaxy Evolution Connecting the Distant Universe with the Local Fossil Record Book PDF

Author : Monique Spite
Publisher : Springer Science & Business Media
Page : 608 pages
File Size : 55,8 Mb
Release : 1999
Category : Science
ISBN : 0792359437

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Galaxy Evolution: Connecting the Distant Universe with the Local Fossil Record by Monique Spite Pdf

This book is an up-to-date review of the basic elements directly connected to the evolution of galaxies. Owing to recent advances in observational astronomy and astrophysics, data has recently become available about remote galaxies, which are consequently in the first stages of their evolution. It is therefore essential to link these data to the observation of very old populations in our own Galaxy, which are the remnants of the populations which existed in the first stages of galactic evolution. In this meeting, the relationship between these two different points of view is emphasized in the texts presented by well-known specialists as well as by young researchers active in the field. The difficulties of the problem and the remaining uncertainties are discussed.

Secular Evolution of Galaxies

Jesús Falcón-Barroso,Johan H. Knapen
Secular Evolution of Galaxies Book PDF

Author : Jesús Falcón-Barroso,Johan H. Knapen
Publisher : Cambridge University Press
Page : 657 pages
File Size : 49,9 Mb
Release : 2012
Category : Science
ISBN : 9781107035270

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Secular Evolution of Galaxies by Jesús Falcón-Barroso,Johan H. Knapen Pdf

The formation and evolution of galaxies is one of the most important topics in modern astrophysics. Secular evolution refers to the relatively slow dynamical evolution due to internal processes induced by a galaxy's spiral arms, bars, galactic winds, black holes and dark matter haloes. It plays an important role in the evolution of spiral galaxies with major consequences for galactic bulges, the transfer of angular momentum, and the distribution of a galaxy's constituent stars, gas and dust. This internal evolution is in turn the key to understanding and testing cosmological models of galaxy formation and evolution. Based on the twenty-third Winter School of the Canary Islands Institute of Astrophysics, this volume presents reviews from nine world-renowned experts on the observational and theoretical research into secular processes, and what these processes can tell us about the structure and formation of galaxies. The volume provides a firm grounding for graduate students and early career researchers working on galactic dynamics and galaxy evolution.

The Evolution of Galaxies

G. Hensler,G. Stasinska,S. Harfst,P. Kroupa,C. Theis
The Evolution of Galaxies Book PDF

Author : G. Hensler,G. Stasinska,S. Harfst,P. Kroupa,C. Theis
Publisher : Springer Science & Business Media
Page : 684 pages
File Size : 41,8 Mb
Release : 2013-11-11
Category : Science
ISBN : 9789401733151

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The Evolution of Galaxies by G. Hensler,G. Stasinska,S. Harfst,P. Kroupa,C. Theis Pdf

Galaxies have a history: distant galaxies, formed early in the life of the universe, differ from the nearby ones. This book addresses the modeling of galaxy evolution from their cosmological formation to their presently observable structures, presenting the state of the art in the field.

Galaxy Formation and Evolution

Houjun Mo,Frank van den Bosch,Simon White
Galaxy Formation and Evolution Book PDF

Author : Houjun Mo,Frank van den Bosch,Simon White
Publisher : Cambridge University Press
Page : 128 pages
File Size : 46,9 Mb
Release : 2010-05-20
Category : Science
ISBN : 9781107394100

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Galaxy Formation and Evolution by Houjun Mo,Frank van den Bosch,Simon White Pdf

The rapidly expanding field of galaxy formation lies at the interface between astronomy, particle physics, and cosmology. Covering diverse topics from these disciplines, all of which are needed to understand how galaxies form and evolve, this book is ideal for researchers entering the field. Individual chapters explore the evolution of the Universe as a whole and its particle and radiation content; linear and nonlinear growth of cosmic structure; processes affecting the gaseous and dark matter components of galaxies and their stellar populations; the formation of spiral and elliptical galaxies; central supermassive black holes and the activity associated with them; galaxy interactions; and the intergalactic medium. Emphasizing both observational and theoretical aspects, this book provides a coherent introduction for astronomers, cosmologists, and astroparticle physicists to the broad range of science underlying the formation and evolution of galaxies.

Dynamical Evolution of Dense Stellar Systems (IAU S246)

International Astronomical Union. Symposium
Dynamical Evolution of Dense Stellar Systems IAU S246 Book PDF

Author : International Astronomical Union. Symposium
Publisher : Cambridge University Press
Page : 516 pages
File Size : 50,5 Mb
Release : 2008-06-12
Category : Science
ISBN : 0521874688

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Dynamical Evolution of Dense Stellar Systems (IAU S246) by International Astronomical Union. Symposium Pdf

Dense stellar systems lie at the interface between dynamics, stellar evolution, and galaxy formation, and they provide us with an ideal laboratory to understand many different aspects of these important fields as well as to explore the interplay between them. The complete study of dense stellar systems is a very challenging task which requires the collaboration and the exchange of ideas of astronomers and physicists with observational and theoretical expertise in galactic and extra-galactic astronomy, stellar dynamics, hydrodynamics, stellar evolution, as well as knowledge of many aspects of computational physics. IAU Symposium 246 brought together experts in all these areas to cover the broad field of dense stellar systems with particular emphasis on the interplay between them and on the comparison between observations and simulations. This volume provides a complete review of the most recent studies in this topical research.

The Evolution of Galaxies

Marc Sauvage,Grazyna Stasinska,D. Schaerer
The Evolution of Galaxies Book PDF

Author : Marc Sauvage,Grazyna Stasinska,D. Schaerer
Publisher : Springer Science & Business Media
Page : 563 pages
File Size : 45,9 Mb
Release : 2013-06-29
Category : Science
ISBN : 9789401733113

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The Evolution of Galaxies by Marc Sauvage,Grazyna Stasinska,D. Schaerer Pdf

Galaxies have a history. This has become clear from recent sky surveys which have shown that distant galaxies, formed early in the life of the Universe, differ from the nearby ones. New observational windows at ultraviolet, infrared and millimetric wavelengths (provided by ROSAT, IRAM, IUE, IRAS, ISO) have revealed that galaxies contain a wealth of components: very hot gas, atomic hydrogen, molecules, dust, dark matter ... A significant advance is expected due to new instruments (VLT, FIRST, XMM) which will allow one to explore the most distant Universe. Three Euroconferences have been planned to punctuate this new epoch in galactic research, bringing together specialists in various fields of Astronomy.

Dynamics of Galaxies

Giuseppe Bertin
Dynamics of Galaxies Book PDF

Author : Giuseppe Bertin
Publisher : Cambridge University Press
Page : 436 pages
File Size : 46,9 Mb
Release : 2000-06-12
Category : Science
ISBN : 0521478553

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Dynamics of Galaxies by Giuseppe Bertin Pdf

Our understanding of galaxies has advanced significantly in recent years. New observations from ground- and space-based telescopes, the discovery of dark matter, and powerful computer simulations have been instrumental in this. This textbook provides graduate students with a complete and thorough introduction to galactic dynamics. The first two parts of the book define the astrophysical problems and the methods for building sound physical models. Next, the observational properties and models of spiral then elliptical galaxies are examined in detail. Finally, a selection of exciting topics from contemporary research are introduced, including the formation and evolution of galaxies, cooling flows, accretion disks, and galaxies at high redshift. Throughout, the emphasis is on developing a clear understanding and good physical intuition of the processes involved. Full derivations are provided for key results and helpful problems are included. This textbook provides graduate students with a self-contained and accessible introduction to modern galactic dynamics.