Mass-to-light ratios in early-type galaxies and the dark matter content

Details Mass-to-light ratios in early-type galaxies and the dark matter content Mass-to-light ratios in early-type galaxies and the dark matter content

2002-11-14

arxiv.org/abs/astro-ph/0211323v1

Astronomy and Astrophysics

Astrophysics

10 pages, 2 ps figures. To appear in the proceedings for the Sakharov Conference of Physics (Moskow, June 2002)

Scientific paper

The distribution of the radial trends of the mass-to-light ratios (M/L) within an assorted sample of early-type galaxies is discussed. Three classes of galaxies are identified according to their M/L gradients. Two such classes are characterized by the presence or by the absence of a radial gradient of the dark-matter (DM) distribution. A third class contains objects which are likely undergoing interaction; they exhibit steep M/L gradients which are possibly the result of a wrong assumption on their equilibrium conditions. Finally, a possible correlation between DM content and morphological types is briefly discussed.

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