LCDM下椭圆星系的质量-光度比
天体物理学
2009-11-11 v1
摘要
我们利用早型星系中质量-光度梯度来推断这些系统的全局暗物质分数f_d=M_d/M_*。我们讨论了关于暗物质星系中总体星系形成效率的含义，指出f_d随质量的趋势产生的virial质量-光度比与半分析模型相符。罗马诺斯基等(Romanowsky et al.)关于准恒定M/L星系的偏度(kurtosis)分析似与Dekel等人(simulations)的模拟结果存在矛盾。
引用
@article{arxiv.astro-ph/0510568,
title = {Mass-to-light ratios of ellipticals in LCDM},
author = {N. R. Napolitano and the PN. S team},
journal= {arXiv preprint arXiv:astro-ph/0510568},
year = {2009}
}
备注
5 pages, 4 figures. To appear in Proceedings of XXIst IAP Colloquium, "Mass Profiles & Shapes of Cosmological Structures" (Paris, 4-9 July 2005), eds G. A. Mamon, F. Combes, C. Deffayet, B. Fort (Paris: EDP Sciences). Figure enlarged with respect the proceeding format, minor changes. Collaboration website at http://www.astro.rug.nl/~pns/pns_team.html