Models for Galaxy halos in an open universe

Details Models for Galaxy halos in an open universe Models for Galaxy halos in an open universe

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...394....1w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 394, no. 1, July 20, 1992, p. 1-6.

Statistics

Computation

65

Astronomical Models, Halos, Interacting Galaxies, Spiral Galaxies, Universe, Computational Astrophysics, Galactic Mass, Galactic Structure

Scientific paper

The properties of simple, self-consistent infall models which embed an 'isothermal' dark halo in an open universe are presented. These models depend on one scaling parameter and two shape parameters. The first may be taken to be the circular velocity in the inner regions, and the others to be the density of the universe, Omega, and a measure, e, of the shape of orbits. These models provide a useful description of ensembles of satellite galaxies, or of binary galaxies, because they allow explicitly for the fact that such systems have orbital periods approaching the age of the universe and so cannot have a random orbital phase.

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