Pairwise velocities of dark matter haloes: a test for the Λ cold dark matter model using the bullet cluster

被引：44

作者：

Thompson, Robert ^{[1
]}

Nagamine, Kentaro ^{[1
]}

机构：

[1] Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 419卷 / 04期

基金：

美国国家科学基金会;

关键词：

galaxies: clusters: general; galaxies: evolution; galaxies: formation; cosmology: theory; dark matter; PECULIAR VELOCITY; SIMULATIONS; DEPENDENCE; EXISTENCE; GALAXIES; UNIVERSE; FIELDS; BIAS;

D O I：

10.1111/j.1365-2966.2011.20000.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The existence of a bullet cluster (such as 1E 0657-56) poses a challenge to the concordance ? cold dark matter (?CDM) model. Here we investigate the velocity distribution of dark matter (DM) halo pairs in large N-body simulations with differing box sizes (250 h-1 Mpc Gpc) and resolutions. We examine various basic statistics such as the halo masses, pairwise halo velocities (v12), collisional angles and pair separation distances. We then compare our results to the initial conditions required to reproduce the observational properties of 1E 0657-56 in non-cosmological hydrodynamical simulations.

引用

页码：3560 / 3570

页数：11

共 36 条

[21] BIAS AND VARIANCE OF ANGULAR-CORRELATION FUNCTIONS [J].

LANDY, SD ;

SZALAY, AS .

ASTROPHYSICAL JOURNAL, 1993, 412 (01) :64-71

[22] BULLET CLUSTER: A CHALLENGE TO ΛCDM COSMOLOGY [J].

Lee, Jounghun ;

Komatsu, Eiichiro .

ASTROPHYSICAL JOURNAL, 2010, 718 (01) :60-65

[23]

Markevitch M, 2006, ESA SPEC PUBL, V604, P723

[24] Direct constraints on the dark matter self-interaction cross section from the merging galaxy cluster 1E 0657-56 [J].

Markevitch, M ;

Gonzalez, AH ;

Clowe, D ;

Vikhlinin, A ;

Forman, W ;

Jones, C ;

Murray, S ;

Tucker, W .

ASTROPHYSICAL JOURNAL, 2004, 606 (02) :819-824

[25] Simulating the bullet cluster [J].

Mastropietro, Chiara ;

Burkert, Andreas .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 389 (02) :967-988

[26] The cluster-merger shock in 1E 0657-56: Faster than a speeding bullet? [J].

Milosavljevic, Milos ;

Koda, Jun ;

Nagai, Daisuke ;

Nakar, Ehud ;

Shapiro, Paul R. .

ASTROPHYSICAL JOURNAL, 2007, 661 (02) :L131-L134

[27] THE OVERDENSITY AND MASSES OF THE FRIENDS-OF-FRIENDS HALOS AND UNIVERSALITY OF HALO MASS FUNCTION [J].

More, Surhud ;

Kravtsov, Andrey V. ;

Dalal, Neal ;

Gottloeber, Stefan .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2011, 195 (01)

[28] THE OBSERVATIONAL CASE FOR A LOW-DENSITY UNIVERSE WITH A NONZERO COSMOLOGICAL CONSTANT [J].

OSTRIKER, JP ;

STEINHARDT, PJ .

NATURE, 1995, 377 (6550) :600-602

[29] Large-scale bias and the peak background split [J].

Sheth, RK ;

Tormen, G .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 308 (01) :119-126

[30] Simulations of the formation, evolution and clustering of galaxies and quasars [J].

Springel, V ;

White, SDM ;

Jenkins, A ;

Frenk, CS ;

Yoshida, N ;

Gao, L ;

Navarro, J ;

Thacker, R ;

Croton, D ;

Helly, J ;

Peacock, JA ;

Cole, S ;

Thomas, P ;

Couchman, H ;

Evrard, A ;

Colberg, J ;

Pearce, F .

NATURE, 2005, 435 (7042) :629-636

← 1 2 3 4 →