[PDF] Kinematics And Dynamics Of Galactic Stellar Populations eBook

Author : Rafael Cubarsi
Publisher : Cambridge Scholars Publishing
Page : 223 pages
File Size : 50,1 MB
Release : 2018-07-27
Category : Science
ISBN : 1527514803

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Stellar dynamics is an interdisciplinary field where mathematics, statistics, physics, and astronomy overlap. The approaches to studying a stellar system include dealing with the collisionless Boltzmann equation, the Chandrasekhar equations, and stellar hydrodynamic equations, which are comparable to the equations of motion of a compressible viscous fluid. Their equivalence gives rise to the closure problem, connected with the higher-order moments of the stellar velocity distribution, which is explained and solved for maximum entropy distributions and for any velocity distribution function, depending on a polynomial function in the velocity variables. On the other hand, the Milky Way kinematics in the solar neighbourhood needs to be described as a mixture distribution accounting for the stellar populations composing the Galactic components. As such, the book offers a statistical study, according to the moments and cumulants of a population mixture, and a dynamical approach, according to a superposition of Chandrasekhar stellar systems, connected with the potential function and the symmetries of the model.

Author : Cathie Clarke
Publisher : Springer
Page : 356 pages
File Size : 34,4 MB
Release : 2015-09-11
Category : Science
ISBN : 3662472902

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Where do most stars (and the planetary systems that surround them) in the Milky Way form? What determines whether a young star cluster remains bound (such as an open or globular cluster), or disperses to join the field stars in the disc of the Galaxy? These questions not only impact understanding of the origins of stars and planetary systems like our own (and the potential for life to emerge that they represent), but also galaxy formation and evolution, and ultimately the story of star formation over cosmic time in the Universe. This volume will help readers understand our current views concerning the answers to these questions as well as frame new questions that will be answered by the European Space Agency's Gaia satellite that was launched in late 2013. The book contains the elaborated notes of lectures given at the 42nd Saas-Fee Advanced Course “Dynamics of Young Star Clusters & Associations" by Cathie Clarke (University of Cambridge) who presents the theory of star formation and dynamical evolution of stellar systems, Robert Mathieu (University of Wisconsin) who discusses the kinematics of star clusters and associations, and I. Neill Reid (S pace Telescope Science Institute) who provides an overview of the stellar populations in the Milky Way and speculates on from whence came the Sun. As part of the Saas-Fee Advanced Course Series, the book offers an in-depth introduction to the field serving as a starting point for Ph.D. research and as a reference work for professional astrophysicists.

Author : K. F. Ogorodnikov
Publisher : Elsevier
Page : 398 pages
File Size : 20,45 MB
Release : 2016-10-13
Category : Science
ISBN : 1483137457

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Dynamics of Stellar Systems focuses on the theoretical problems in stellar dynamics. The book first offers information on stellar dynamics, including historical development, fundamentals of synthetic method, and value of stellar dynamics. The text discusses the fundamental concepts of stellar statistics. Properties of univariate distribution functions; multivariate distribution functions; and statistical properties of stars are explained. The text then describes the elementary theory of galactic rotation and irregular forces in stellar systems. The text also tackles statistical stellar dynamics of neglecting encounters. Considerations include Boltzmann equation in curvilinear coordinates; importance of using one-valued integrals of the motion; and fundamental differential equation of stellar dynamics. The book also underscores the regular orbit of stars and dynamics of centroids. The text describes the dynamics of spherical stellar and rotating stellar systems. The theory of polytropic spheres; basic equations for spherical systems; masses and rotation of galaxies; and boundaries of galaxies are discussed. The text is highly recommended for readers interested in stellar dynamics.

Author : José Fernandez Trincado
Publisher :
Page : 0 pages
File Size : 45,39 MB
Release : 2017
Category :
ISBN :

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This work of thesis concerns an in detailed study of the structure, kinematics and dynamics of the Milky Way,with a particular emphasis on the bulge region and the halo. The main goal of this work is to establish dynamicalconstraints on the physical parameters of the Galactic bar in order to construct a detailed kinematic maps of the innerregions of the our Galaxy. Such map can be used as an ingredient for the Besançon stellar populations synthesismodel, allowing to provide accurate kinematic simulations in the inner regions of the disk and in the bar itself.In this thesis I present several analytic and semi-analytic potentials to approximate the 3D gravitational potentialmodel of the Milky Way, observationally and dynamically constrained, where the perturbations produced by theGalactic bar fit fairly well the global kinematic trends in the Galactic bulge. Using ~10 millions massless particles as tracers of stellar kinematics, we present a full study of the orbits in the bar, and non-stationary effects of the bar on the disks and the halo. In particular we trace the kinematic imprints of disk particles trapped/scattered in the Galactic bar. Finally, we analyse the orbits of chemically peculiar stars in the Milky Way field and its relation with globular clusterstars from the analysis of spectroscopic data. These results confirm previous claims that a small fraction of the Galactichalo is made up of light-element abundance patterns observed only in the globular clusters environments. Theyprovide a crucial observational support to the "merging" scenario of the Milky Way bulge region as well as in thehalo. We develop a method to compute the stellar kinematics and orbits inferred from the density profiles and the gravitational potential for several stellar populations. As a by product of this thesis, we provide the GravPot16 package, a software designed for Galactic dynamics, and orbit integration. Also taking advantage of high quality data produced by the first data release of the mission Gaia (TGAS) combined with accurate chemical information from the APOGEE datasets, I present preliminary results of the Chemo-orbital properties of the Milky Way.

Author : James Binney
Publisher : Princeton University Press
Page : 818 pages
File Size : 13,86 MB
Release : 2021-07-13
Category : Science
ISBN : 0691233322

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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.

Author : R. S. de Jong
Publisher : Springer Science & Business Media
Page : 605 pages
File Size : 29,30 MB
Release : 2007-05-24
Category : Science
ISBN : 1402055730

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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.

Author : E. Athanassoula
Publisher : Springer
Page : 456 pages
File Size : 41,22 MB
Release : 1983-02-28
Category : Science
ISBN :

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Proceedings of IAU Symposium No. 100, held in Besançon, France, August 9-13, 1982

Author : James Binney
Publisher : Princeton University Press
Page : 902 pages
File Size : 22,6 MB
Release : 2011-10-30
Category : Science
ISBN : 1400828724

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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

Author : Cathie Clarke
Publisher :
Page : pages
File Size : 39,80 MB
Release : 2015
Category :
ISBN : 9783662472910

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Where do most stars (and the planetary systems that surround them) in the Milky Way form? What determines whether a young star cluster remains bound (such as an open or globular cluster), or disperses to join the field stars in the disc of the Galaxy? These questions not only impact understanding of the origins of stars and planetary systems like our own (and the potential for life to emerge that they represent), but also galaxy formation and evolution, and ultimately the story of star formation over cosmic time in the Universe. This volume will help readers understand our current views concerning the answers to these questions as well as frame new questions that will be answered by the European Space Agency's Gaia satellite that was launched in late 2013. The book contains the elaborated notes of lectures given at the 42nd Saas-Fee Advanced Course "Dynamics of Young Star Clusters & Associations" by Cathie Clarke (University of Cambridge) who presents the theory of star formation and dynamical evolution of stellar systems, Robert Mathieu (University of Wisconsin) who discusses the kinematics of star cluster s and associations, and I. Neill Reid (Space Telescope Science Institute) who provides an overview of the stellar populations in the Milky Way and speculates on from whence came the Sun. As part of the Saas-Fee Advanced Course Series, the book offers an in-depth introduction to the field serving as a starting point for Ph.D. research and as a reference work for professional astrophysicists.