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Scaling Laws for Dark Matter Halos in Late-Type and Dwarf Spheroidal Galaxies

Kormendy, John; Freeman, Kenneth

Description

Dark matter (DM) halos of Sc–Im and dwarf spheroidal (dSph) galaxies satisfy scaling laws: halos in lower-luminosity galaxies have smaller core radii, higher central densities, and smaller velocity dispersions. These results are based on maximum-disk rotation curve decompositions for giant galaxies and Jeans equation analysis for dwarfs. (1) We show that spiral, Im, and Sph galaxies with absolute magnitudes MV > −18 form a sequence of decreasing baryon-to-DM surface density with decreasing...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
URI: http://hdl.handle.net/1885/152197
Source: The Astrophysical Journal
DOI: 10.3847/0004-637X/817/2/84
Access Rights: Open Access

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