Advertisement

Dynamical Evolution of Galaxies: Supercomputer N-Body Simulations

  • Edward Liverts
  • Evgeny Griv
  • Michael Gedalin
  • David Eichler
Chapter
Part of the Lecture Notes in Physics book series (LNP, volume 626)

Abstract

The time evolution of a computer model for an isolated disk representing a flat galaxy is studied. The method of direct integration of Newton’s equations of motion of particles-"stars" is applied. Using the modern 128-processor SGI Origin 2000 supercomputer in Israel, we make long simulation runs with a large number of particles, N = 100 000. One of the goals of the simulation is to test the validities of the modified Safronov-Toomre criterion for stability of arbitrary but not only axisymmetric Jeans-type gravity disturbances (e.g., those produced by a spontaneous perturbation and/or a companion system) in a self-gravitating, thin, and almost collisionless stellar disk. We are also interested in how model particles diffuse in chaotic (residual) velocity space. This is of considerable interest in the nonlinear theory of stellar disks.

Keywords

Velocity Dispersion Spiral Galaxy Spiral Structure Stellar Disk Jeans Instability 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Edward Liverts
    • 1
  • Evgeny Griv
    • 1
  • Michael Gedalin
    • 1
  • David Eichler
    • 1
  1. 1.Ben-Gurion University of the NegevBeer-ShevaIsrael

Personalised recommendations