The ratio of the halo mass to the disk mass in the Galaxy

Details The ratio of the halo mass to the disk mass in the Galaxy The ratio of the halo mass to the disk mass in the Galaxy

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981azh....58..734m&link_type=abstract

Astronomicheskii Zhurnal, vol. 58, July-Aug. 1981, p. 734-742. In Russian.

Astronomy and Astrophysics

Astronomy

10

Barred Galaxies, Galactic Evolution, Galactic Structure, Halos, Mass Ratios, Astronomical Models, Disks (Shapes), Perturbation Theory, Star Distribution, Velocity Distribution

Scientific paper

Numerical experiments are carried out to investigate the evolution and final stationary state of Galaxy models consisting of halos in which the density rho(r) is approximately r to the -2 and r to the -4 and a disk of finite thickness comprising 200 particle-stars of exponential surface density approximately equal to exp (-r/L). The instability of the bar mode is suppressed when the ratio of the mass of the halo to that of the disk is greater than about 1. It is noted that halos concentrated toward the center possess better stabilizing properties. With regard to the ratio of the dispersion of radial velocities to angular velocity, the experiments are found to agree with observational data near the sun, the halo/disk ratio being approximately 2

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