Models for galaxy halos in an open universe

Simon D M White, Dennis F Zaritsky

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

We present the properties of simple, self-consistent infall models which embed an " isothermal " dark halo in an open universe. 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, Ω, 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.

Original languageEnglish (US)
Pages (from-to)1-6
Number of pages6
JournalAstrophysical Journal
Volume394
Issue number1
StatePublished - 1992

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halos
universe
galaxies
orbitals
orbits
scaling
parameter

Keywords

  • Cosmology : Theory
  • Galaxies : Formation
  • Galaxies : Interactions

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Models for galaxy halos in an open universe. / White, Simon D M; Zaritsky, Dennis F.

In: Astrophysical Journal, Vol. 394, No. 1, 1992, p. 1-6.

Research output: Contribution to journalArticle

White, Simon D M ; Zaritsky, Dennis F. / Models for galaxy halos in an open universe. In: Astrophysical Journal. 1992 ; Vol. 394, No. 1. pp. 1-6.
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