Effect of small-scale density perturbations on the formation of dark matter halo profiles

被引：5

作者：

Pilipenko, S. V. ^{[1
,2
]}

Doroshkevich, A. G. ^{[1
]}

Lukash, V. N. ^{[1
]}

Mikheeva, E. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Lebedev Phys Inst, Astro Space Ctr, Moscow 117997, Russia

[2] Moscow Inst Phys & Technol, Dolgoprudnyj 141700, Russia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 427卷 / 01期

关键词：

galaxies: haloes; dark matter; GRAVITATIONAL COLLAPSE; SUBSTRUCTURE; POWER;

D O I：

10.1111/j.1745-3933.2012.01339.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

With the help of a set of toy N-body models of dark halo formation, we study the impact of small-scale initial perturbations on the inner density profiles of haloes. We find a significant flattening of the inner slope alpha = d log rho/d log r to alpha = -0.5 in some range of scales and amplitudes of the perturbations (while in the case of absence of these perturbations, the NavarroFrenkWhite profile with alpha = -1 is reproduced). This effect may be responsible for the formation of cuspless galactic haloes.

引用

页码：L30 / L34

页数：5

共 50 条

[1] Dark matter annihilation in small-scale clumps in the galactic halo
Berezinsky, VS
Dokuchaev, VI
Eroshenko, YN
PHYSICS OF ATOMIC NUCLEI, 2004, 67 (06) : 1195 - 1197
[2] Dark Matter annihilation in small-scale clumps in the Galactic halo
V. S. Berezinsky
V. I. Dokuchaev
Yu. N. Eroshenko
Physics of Atomic Nuclei, 2004, 67 : 1195 - 1197
[3] Small-scale clumps in the galactic halo and dark matter annihilation
Berezinsky, V
Dokuchaev, V
Eroshenko, Y
PHYSICAL REVIEW D, 2003, 68 (10)
[4] Small-scale perturbations in a general mixed dark matter cosmology
Hu, W
Eisenstein, DJ
ASTROPHYSICAL JOURNAL, 1998, 498 (02): : 497 - 503
[5] The density profiles of the dark matter halo are not universal
Jing, YP
Suto, Y
ASTROPHYSICAL JOURNAL, 2000, 529 (02): : L69 - L72
[6] The origin of cold dark matter halo density profiles
Mo, H. J.
Mass Profiles and Shapes of Cosmological Structures, 2006, 20 : 51 - 54
[7] On the origin of cold dark matter halo density profiles
Lu, Yu
Mo, H. J.
Katz, Neal
Weinberg, Martin D.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 368 (04) : 1931 - 1940
[8] Investigating the origins of dark matter halo density profiles
Williams, LLR
Babul, A
Dalcanton, JJ
ASTROPHYSICAL JOURNAL, 2004, 604 (01): : 18 - 39
[9] Small-scale dark matter clumps
Berezinsky, VS
Dokuchaev, VI
Eroshenko, YN
IDENTIFICATION OF DARK MATTER, 2005, : 81 - 86
[10] Small-scale clumps of dark matter
Berezinsky, V. S.
Dokuchaev, V. I.
Eroshenko, Yu N.
PHYSICS-USPEKHI, 2014, 57 (01) : 1 - 36

← 1 2 3 4 5 →