The equilibrium of cool stellar disks.
Abstract
A system of finite infinitesimally thin selfgravitating disks is constructed. The sequence begins with the uniformly rotating disk and approaches the isothermal disk, and the latter members of the sequence resemble real disk galaxies. A mathematical description of cool stellar disks is presented for application to model galaxies in which the ratio of random to mean velocity is small, except near the center. Phasespace moments of the modified Schwarzschild stellar distribution function are shown to have an expansion in powers of the ratio of the star's random kinetic energy to gravitational potential energy
 Publication:

The Astrophysical Journal
 Pub Date:
 May 1978
 DOI:
 10.1086/156126
 Bibcode:
 1978ApJ...222..103Z
 Keywords:

 Galactic Structure;
 Gravitational Fields;
 Star Distribution;
 Stellar Motions;
 Astronomical Models;
 Distribution Functions;
 Kinetic Energy;
 Potential Energy;
 Rotating Disks;
 Astrophysics;
 Galaxies:Stellar Dynamics;
 Stellar Disks: Models