The Dynamical Relaxation Time Scale of the Milky Way Conference Paper uri icon


  • Astrophysical Ages and Time Scales ASP Conference Series, Vol. ~5, 2001 T. von Hippel, C. Simpson, N. Manset The Dynamical Relaxation Time Scale of the Milky Way E. Griv, M. Gedalin, D. Eichler Department of Physics, Ben-Gurion University of the Negev, PO Box 653, Beer-Sheva 84105, Israel C. Yuan Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), Taipei 115~29, Taiwan Abstract. We analyse the reaction of collective oscillations excited in the nonresonant interaction between almost aperiodically growing Jeanstype gravity perturbations and stars of a rapidly rotating disk of flat galaxies. An equation is derived which describes the change in the main body of the equilibrium distribution of stars in the framework of the weakly nonlinear theory, that is, a quasi-linearization of a self-consistent Boltzmann—Poisson system of equations. Certain applications of the theory to the problem of collisionless dynamical …

publication date

  • January 1, 2001