Do arcs require flat halo cusps?

被引:43
作者
Bartelmann, M
Memeghetti, M
机构
[1] Heidelberg Univ, ITA, D-69121 Heidelberg, Germany
[2] Univ Padua, Dipartimento Astron, I-35122 Padua, Italy
关键词
gravitational lensing; galaxies : clusters : general; cosmology : dark matter;
D O I
10.1051/0004-6361:20035763
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
It was recently claimed that several galaxy clusters containing radial and tangential gravitational arcs and having a measured velocity-dispersion profile for the brightest cluster galaxy had to have central density profiles considerably flatter than those found in CDM cluster simulations. Using a simple analytic mass model, we confirm this result or axially symmetric mass distributions. However, we demonstrate that steep density profiles are well in agreement with the cluster requiring the flattest axially symmetric profile once even small deviations from axial symmetry are introduced.
引用
收藏
页码:413 / 418
页数:6
相关论文
共 13 条
[1]  
Bartelmann M, 1996, ASTRON ASTROPHYS, V313, P697
[2]   A SIMPLE-MODEL FOR THE DISTRIBUTION OF LIGHT IN SPHERICAL GALAXIES [J].
JAFFE, W .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1983, 202 (03) :995-999
[3]   The density profiles of the dark matter halo are not universal [J].
Jing, YP ;
Suto, Y .
ASTROPHYSICAL JOURNAL, 2000, 529 (02) :L69-L72
[4]   Resolving the structure of cold dark matter halos [J].
Klypin, A ;
Kravtsov, AV ;
Bullock, JS ;
Primack, JR .
ASTROPHYSICAL JOURNAL, 2001, 554 (02) :903-915
[5]   GRAVITATIONAL LENSING BY A CLUSTER OF GALAXIES AND THE CENTRAL CD GALAXY - MEASURING THE MASS PROFILE [J].
MIRALDAESCUDE, J .
ASTROPHYSICAL JOURNAL, 1995, 438 (02) :514-526
[6]   Resolving the structure of cold dark matter halos [J].
Moore, B ;
Governato, F ;
Quinn, T ;
Stadel, J ;
Lake, G .
ASTROPHYSICAL JOURNAL, 1998, 499 (01) :L5-+
[7]  
Narayan R., 1999, FORMATION STRUCTURE, P360
[8]   A universal density profile from hierarchical clustering [J].
Navarro, JF ;
Frenk, CS ;
White, SDM .
ASTROPHYSICAL JOURNAL, 1997, 490 (02) :493-508
[9]  
SAND D, 2003, UNPUB APJ
[10]   The dark matter density profile of the lensing cluster MS 2137-23: A test of the cold dark matter paradigm [J].
Sand, DJ ;
Treu, T ;
Ellis, RS .
ASTROPHYSICAL JOURNAL, 2002, 574 (02) :L129-L133