Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...137...26b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 137, no. 1, Aug. 1984, p. 26-28. Research supported by the Ministero della Pub
Astronomy and Astrophysics
Astrophysics
53
Dynamic Models, Elliptical Galaxies, Stellar Models, Stellar Systems, Distribution Functions, Energy Distribution, Pressure Distribution, Velocity Distribution
Scientific paper
The properties of a family of distribution functions which describe axisymmetric self-gravitating non-rotating stellar systems are discussed. These models can be treated self-consistently for the cases where the departure from spherical symmetry is small. One self-consistent equilibrium of the family is calculated in detail. It is found to develop pressure anisotropy, velocity dispersion, and energy distribution well in agreement with results obtained in recent N-body simulations. In addition, it satisfies the de Vaucouleurs law for the projected density distribution in a wide radial range, even though it tends to exhibit a sizable core structure with a flat profile at the center. These models can be easily generalized to include the presence of rotation.
Bertin Giuseppe
Stiavelli Massimo
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