The equilibrium of cool stellar disks

Details The equilibrium of cool stellar disks The equilibrium of cool stellar disks

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222..103z&link_type=abstract

Astrophysical Journal, Part 1, vol. 222, May 15, 1978, p. 103-109.

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1

Galactic Structure, Gravitational Fields, Star Distribution, Stellar Motions, Astronomical Models, Distribution Functions, Kinetic Energy, Potential Energy, Rotating Disks

Scientific paper

A system of finite infinitesimally thin self-gravitating 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. Phase-space 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

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