Cosmological constraints from X-ray AGN clustering and type Ia supernova data

被引:17
|
作者
Basilakos, S
Plionis, M
机构
[1] Natl Observ Athens, Inst Astron & Astrophys, Athens 15236, Greece
[2] INAOE, Puebla 72000, Mexico
关键词
galaxies : clusters : general; cosmology : theory; large-scale structure of Universe; X-rays : general;
D O I
10.1111/j.1745-3933.2005.00041.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We put constraints on the main cosmological parameters of different spatially flat cosmological models by combining the recent clustering results of XMM-Newton soft (0.5-2 keV) X-ray sources, which have a redshift distribution with median redshift z similar to 1.2, and Type Ia supernova data. Using a likelihood procedure we find that the model that best reproduces the observational data and which is consistent with stellar ages is the concordance cold dark matter model with omega m similar or equal to 0.28, w similar or equal to-1, H-0 72 km s(-1) Mpc(-1) and t(0)similar or equal to 13.5 Gyr, and has an X-ray active galactic nucleus clustering evolution which is constant in physical coordinates. For a different clustering evolution model (constant in comoving coordinates) we find another viable model, although less probable because of the smaller age of the universe, with omega(m)similar or equal to 0.38, w similar or equal to-1.25, H-0 70 km s(-1) Mpc(-1) and t(0)similar or equal to 12.9 Gyr.
引用
收藏
页码:L35 / L38
页数:4
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