Modeling Star Formation in Dwarf Spheroidal Galaxies: A Case for Extended Dark Matter Halos
نویسندگان
چکیده
منابع مشابه
Modeling Star Formation in Dwarf Spheroidal Galaxies: a Case for Extended Dark Matter Halos
We propose a simple model for the formation of dwarf spheroidal galaxies, in which stars are assumed to have formed from isothermal gas in hydrostatic equilibrium inside extended dark matter halos. After expelling the leftover gas, the stellar system undergoes a dynamical relaxation inside the dark matter halo. These models can adequately describe the observed properties of three (Draco, Sculpt...
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Published mass models fitted to galaxy rotation curves are used to study the systematic properties of dark matter (DM) halos in late-type and dwarf spheroidal (dSph) galaxies. Halo parameters are derived by fitting non-singular isothermals to (V 2−V 2 vis ), where V (r) is the observed rotation curve and Vvis is the rotation curve of the visible matter. The latter is calculated from the surface...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2005
ISSN: 0004-637X,1538-4357
DOI: 10.1086/429403