Do Elliptical Galaxies Have Dark Matter?

Details Do Elliptical Galaxies Have Dark Matter? Do Elliptical Galaxies Have Dark Matter?

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...19112405l&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #124.05; Bulletin of the American Astronomical Society, Vol. 29, p.1408

Astronomy and Astrophysics

Astronomy

Scientific paper

Analyzing the relationship between X-ray temperature and velocity dispersion in an optically complete sample of elliptical galaxies recently derived by Davis & White, we demonstrate that L>L_* galaxies contain substantial amounts of dark matter in general. We also present constraints on the dark matter scale length and on the dark-to-luminous mass ratio both within the optical half-light radius and for the entire galaxy. Our results can be consistently embedded within a standard CDM scenario for structure formation, but only if elliptical galaxies have suffered substantial mass loss with less massive systems losing progressively more mass.

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