Galaxy cluster angular-size data constraints on dark energy

被引：22

作者：

Chen, Y. ^{[1
,2
]}

Ratra, B. ^{[1
]}

机构：

[1] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China

[2] Kansas State Univ, Dept Phys, Manhattan, KS 66506 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2012年 / 543卷

关键词：

cosmology: miscellaneous; cosmology: theory; dark energy; DISTANCE-DUALITY RELATION; GAS MASS FRACTION; PROBE WMAP OBSERVATIONS; BARYON ACOUSTIC PEAK; X-RAY OBSERVATIONS; DIGITAL SKY SURVEY; EQUATION-OF-STATE; COSMOLOGICAL CONSTRAINTS; REDSHIFT SURVEY; SUPERNOVAE;

D O I：

10.1051/0004-6361/201117944

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use angular size versus redshift data for galaxy clusters provided by Bonamente and collaborators to place constraints on model parameters of constant and time-evolving dark energy cosmological models. These constraints are compatible with those from other recent data, but are not very restrictive. A joint analysis of the galaxy cluster angular-size data with the more restrictive baryon acoustic oscillation peak length scale and supernova Type Ia apparent-magnitude data, favors a spatially flat cosmological model currently dominated by a time-independent cosmological constant, but does not exclude time-varying dark energy.

引用

页数：8

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