Kinematics and Dynamics of Galactic Stellar Populations (eBook)

Rafael Cubarsi (Autor)

eBook Download: PDF

2018
223 Seiten
Cambridge Scholars Publishing (Verlag)
978-1-5275-1480-5 (ISBN)

Infos

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.

Produkt-Details

• Erscheint lt. Verlag: 27.7.2018
• Themenwelt: Naturwissenschaften ► Physik / Astronomie ► Astronomie / Astrophysik
• ISBN-10: 1-5275-1480-3 / 1527514803
• ISBN-13: 978-1-5275-1480-5 / 9781527514805