早型星系的质量-光度比与暗物质含量
摘要
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. 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.
引用
@article{arxiv.astro-ph/0211323,
title = {Mass-to-light ratios in early-type galaxies and the dark matter content},
author = {M. Capaccioli and N. R. Napolitano and M. Arnaboldi},
journal= {arXiv preprint arXiv:astro-ph/0211323},
year = {2007}
}
备注
10 pages, 2 ps figures. To appear in the proceedings for the Sakharov Conference of Physics (Moskow, June 2002)