Universal Properties of Dark Matter Halos

被引：45

作者：

Boyarsky, A. ^{[1
,2
]}

Neronov, A. ^{[3
]}

Ruchayskiy, O. ^{[1
]}

Tkachev, I. ^{[4
]}

机构：

[1] Ecole Polytech Fed Lausanne, FSB ITP LPPC, CH-1015 Lausanne, Switzerland

[2] Bogolyubov Inst Theoret Phys, UA-03680 Kiev, Ukraine

[3] Versoix & Geneva Observ, INTEGRAL Sci Data Ctr, CH-1290 Sauverny, Switzerland

[4] Inst Nucl Res, Moscow 117312, Russia

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 19期

基金：

瑞士国家科学基金会;

关键词：

SECONDARY INFALL MODEL; LOCAL GROUP; GALAXIES; SPECTRUM; DYNAMICS; DENSITY; EARTH;

D O I：

10.1103/PhysRevLett.104.191301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We discuss the universal relation between density and size of observed dark matter halos that was recently shown to hold on a wide range of scales, from dwarf galaxies to galaxy clusters. Predictions of cold dark matter (Lambda CDM) N-body simulations are consistent with this relation. We demonstrate that this property of Lambda CDM can be understood analytically in the secondary infall model. Qualitative understanding given by this model provides a new way to predict which deviations from Lambda CDM or large-scale modifications of gravity can affect universal behavior and, therefore, to constrain them observationally.

引用

页数：4

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