Kinematics and dynamics of galactic stellar populations
By: by Rafael Cubarsi
Publisher: Cambridge Scholars Publishing
Published: 2018
Place of publication: Newcastle upon Tyne, UK
Language: eng
Number of pages: 211
ISBN-13: 9781527505629
Copyright date: 2018
Subjects: Stellar dynamics; Galactic dynamics; Galaxies
Description: "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."--
Notes: Includes bibliographical references (pages 201-207) and index.