Clusters and cosmology

被引:23
作者
Bahcall, NA [1 ]
机构
[1] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA
来源
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS | 2000年 / 333卷 / 1-6期
关键词
cosmology; dark matter; clusters of galaxies;
D O I
10.1016/S0370-1573(00)00024-7
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Rich clusters of galaxies, the largest virialized systems known, place powerful constraints on cosmology. Some of the fundamental questions that can be addressed with clusters of galaxies include: What is the mass-density of the universe? and how is the mass distributed? We show that several independent methods utilizing clusters of galaxies - cluster mass-to-light ratio, baryon fraction in clusters, and cluster evolution - all indicate the same robust result: the mass-density of the universe is low, Omega(m) similar or equal to 0.25, and the mass approximately traces light on large scales. Combining the cluster results with recent observations of high-redshift supernovae and the cosmic microwave background anisotropy spectrum indicates a remarkable consistency among these independent, nearly orthogonal methods; the combined results, presented in a cosmic triangle plot, suggest a universe that is lightweight, is accelerating, and is flat. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:233 / 244
页数:12
相关论文
共 48 条
[1]   A lightweight universe? [J].
Bahcall, NA ;
Fan, XH .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1998, 95 (11) :5956-5959
[2]   CLUSTERS OF GALAXIES [J].
BAHCALL, NA .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1977, 15 :505-540
[3]   GALAXY CLUSTERS AND COLD DARK MATTER - A LOW-DENSITY UNBIASED UNIVERSE [J].
BAHCALL, NA ;
CEN, R .
ASTROPHYSICAL JOURNAL, 1992, 398 (02) :L81-L84
[4]   The most massive distant clusters:: Determining Ω and σ8 [J].
Bahcall, NA ;
Fan, XH .
ASTROPHYSICAL JOURNAL, 1998, 504 (01) :1-6
[5]  
BAHCALL NA, 1995, ASTROPHYS J, V447, pL81, DOI 10.1086/309577
[6]   Constraining Omega with cluster evolution [J].
Bahcall, NA ;
Fan, XH ;
Cen, RY .
ASTROPHYSICAL JOURNAL, 1997, 485 (02) :L53-L56
[7]   Cosmology - The cosmic triangle: Revealing the state of the universe [J].
Bahcall, NA ;
Ostriker, JP ;
Perlmutter, S ;
Steinhardt, PJ .
SCIENCE, 1999, 284 (5419) :1481-1488
[8]   Redshift evolution of galaxy cluster densities [J].
Carlberg, RG ;
Morris, SL ;
Yee, HKC ;
Ellingson, E .
ASTROPHYSICAL JOURNAL, 1997, 479 (01) :L19-L22
[9]   Galaxy cluster virial masses and Omega [J].
Carlberg, RG ;
Yee, HKC ;
Ellingson, E ;
Abraham, R ;
Gravel, P ;
Morris, S ;
Pritchet, CJ .
ASTROPHYSICAL JOURNAL, 1996, 462 (01) :32-49
[10]   Unlensing multiple arcs in 0024+1654: Reconstruction of the source image [J].
Colley, WN ;
Tyson, JA ;
Turner, EL .
ASTROPHYSICAL JOURNAL, 1996, 461 (02) :L83-+