Journal article
Measuring Dark Matter in Galaxies: The Mass Fraction within Five Effective Radii
Abstract
Large galaxies may contain an “atmosphere” of hot interstellar X-ray gas, and the temperature and radial density profile of this gas can be used to measure the total mass of the galaxy contained within a given radius r. We use this technique for 102 early-type galaxies with stellar masses M⋆ > 1010M⊙, to evaluate the mass fraction of dark matter (DM) within the fiducial radius r = 5re, denoted f5 = fDM(5re). On average, these systems have a …
Authors
Harris WE; Remus R-S; Harris GLH; Babyk IV
Journal
The Astrophysical Journal, Vol. 905, No. 1,
Publisher
American Astronomical Society
Publication Date
December 1, 2020
DOI
10.3847/1538-4357/abc429
ISSN
0004-637X