Kinematics and Dynamics of Galactic Stellar Populations

Kinematics and Dynamics of Galactic Stellar Populations
Author: Rafael Cubarsi
Publisher: Cambridge Scholars Publishing
Total Pages: 223
Release: 2018-07-27
Genre: 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.


Kinematics and Dynamics of Galactic Stellar Populations
Language: en
Pages: 223
Authors: Rafael Cubarsi
Categories: Science
Type: BOOK - Published: 2018-07-27 - Publisher: Cambridge Scholars Publishing

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