Kinematics and Dynamics of Galactic Stellar Populations

Released on by Rafael Cubarsi
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  • Kinematics and Dynamics of Galactic Stellar Populations Book Detail

  • Author : Rafael Cubarsi
  • Release Date : 2018-07-27
  • Publisher : Cambridge Scholars Publishing
  • Genre : Science
  • Pages : 223
  • ISBN 13 : 1527514803
  • File Size : 13,13 MB
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Kinematics and Dynamics of Galactic Stellar Populations by Rafael Cubarsi PDF Summary

Book 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.

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