The central densities of spherical stellar systems with anisotropic velocity dispersions

Details The central densities of spherical stellar systems with anisotropic velocity dispersions The central densities of spherical stellar systems with anisotropic velocity dispersions

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..279h&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 93, June-July 1981, p. 279, 280.

Astronomy and Astrophysics

Astronomy

Galactic Clusters, Gravitational Collapse, Stellar Motions, Stellar Systems, Velocity Distribution, Anisotropy, Elliptical Galaxies, Hydrodynamic Equations, Many Body Problem

Scientific paper

N-body collapse calculations by various authors show evidence for an appreciable velocity anisotropy in the outer parts of the system. By the use of a simple stellar dynamical model of Ogorodnikov (1965), the effects of this anisotropy on the central density obtained from the core-fitting technique of King and Minkowski (1972) are considered. The result suggests that the central densities of clusters of galaxies may be approximately 20% less than those calculated without taking the anisotropy into account.

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