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

[21] Scalar field dark matter: helping or hurting small-scale problems in cosmology?
Robles, Victor H.
Bullock, James S.
Boylan-Kolchin, Michael
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2019, 483 (01) : 289 - 298
[22] Seeking Observable Imprints of Small-Scale Structure on the Properties of Dark Matter Haloes
Power, C.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA, 2013, 30
[23] Constraining the Small-Scale Clustering of Dark Matter with Stellar Streams
Bovy, Jo
ILLUMINATING DARK MATTER, 2019, 56 : 9 - 18
[24] Decaying cold dark matter model and small-scale power
Cen, RY
ASTROPHYSICAL JOURNAL, 2001, 546 (02) : L77 - L80
[25] Dwarf stellar haloes: a powerful probe of small-scale galaxy formation and the nature of dark matter
Deason, Alis J.
Bose, Sownak
Fattahi, Azadeh
Amorisco, Nicola C.
Hellwing, Wojciech
Frenk, Carlos S.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2022, 511 (03) : 4044 - 4059
[26] Environmental dependence of cold dark matter halo formation
Wang, H. Y.
Mo, H. J.
Jing, Y. P.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 375 (02) : 633 - 639
[27] Statistical ensembles of virialized halo matter density profiles
Carron, J.
Szapudi, I.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2013, 432 (04) : 3161 - 3167
[28] On the physical origin of dark matter density profiles
Ascasibar, Y
Yepes, G
Gottlöber, S
Müller, V
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 352 (04) : 1109 - 1120
[29] Evolution of the density profiles of dark matter haloes
Reed, D
Governato, F
Verde, L
Gardner, J
Quinn, T
Stadel, J
Merritt, D
Lake, G
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 357 (01) : 82 - 96
[30] Small-scale clumps in the Galactic halo
V. S. Berezinsky
V. I. Dokuchaev
Yu. N. Eroshenko
Physics of Atomic Nuclei, 2010, 73 : 179 - 190

← 1 2 3 4 5 →