Computer experiments on the effect of retrograde stars in disk galaxies

Details Computer experiments on the effect of retrograde stars in disk galaxies Computer experiments on the effect of retrograde stars in disk galaxies

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226..521z&link_type=abstract

Astrophysical Journal, Part 1, vol. 226, Dec. 1, 1978, p. 521-539.

Astronomy and Astrophysics

Astrophysics

65

Angular Momentum, Astronomical Models, Computerized Simulation, Galactic Rotation, Spiral Galaxies, Stellar Rotation, Distribution Functions, Fast Fourier Transformations, Gravitational Fields, Green'S Functions, Numerical Integration, Velocity Distribution

Scientific paper

Using large-scale N-body calculations for flat disk galaxies, we examine the effect of reversing the angular momentum for various fractions of the stars upon the global bar-forming mode. The initial conditions for these simulations are based on stationary states of two classes of models: the isochrones studied recently by Kalnajs by means of linear theory, and a model resembling the Schmidt model of our own Galaxy. In both cases, as the fraction of retrograde stars is increased, the growth of the bar-forming mode is inhibited (although not eliminated). These N-body results for the isochrones agree with the predictions of linear theory, quantitatively as well as qualitatively.

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