A universal density profile for dark and luminous matter?

被引：182

作者：

Merritt, D

Navarro, JF

Ludlow, A

Jenkins, A

机构：

[1] Rochester Inst Technol, Dept Phys, Rochester, NY 14623 USA

[2] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, Canada

[3] Max Planck Inst Astrophys, D-85740 Garching, Germany

[4] Univ Durham, Inst Computat Cosmol, Durham DH1 3LE, England

来源：

ASTROPHYSICAL JOURNAL | 2005年 / 624卷 / 02期

关键词：

dark matter; galaxies : elliptical and lenticular; cD; galaxies : structure;

D O I：

10.1086/430636

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore similarities in the luminosity distribution of early-type galaxies and the mass profiles of Lambda CDM halos. The spatial structure of these systems may be accurately described by a simple law in which the logarithmic slope of the density varies as a power of the radius: the Sersic law. We show that this law provides a significantly better fit to a set of high-resolution Lambda CDM halos than a three-parameter generalization of the Navarro-Frenk-White profile. We discuss possible reasons why the same law should describe dark and luminous systems that span a range of over 7 decades in mass.

引用

页码：L85 / L88

页数：4

共 25 条

[1] THE PHASE-SPACE STRUCTURE OF R1/4 GALAXIES - ARE THESE GALAXIES ISOTHERMAL AFTER ALL [J].