Halo masses of early-type galaxies: theory vs observation

Details Halo masses of early-type galaxies: theory vs observation Halo masses of early-type galaxies: theory vs observation

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.3107r&link_type=abstract

American Astronomical Society Meeting 205, #31.07; Bulletin of the American Astronomical Society, Vol. 36, p.1397

Astronomy and Astrophysics

Astronomy

Scientific paper

We introduce a mass-to-light gradient parameter to describe the amount of dark matter surrounding early-type galaxies. Assembling kinematic data from the literature on the halo masses of 20 galaxies, we find a correlation between luminosity and gradient. The gradients do not fit in well with predictions from LCDM, requiring either baryon excess or diffuse halos
We also describe various programs using planetary nebulae, globular clusters, and X-rays to jointly determine galaxy halo masses.

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