arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0909.3919astro-ph.COgr-qchep-phhep-th
收藏

X射线AGN聚类的精确宇宙学

Precision Cosmology from X-ray AGN clustering

Spyros Basilakos, Manolis Plionis

摘要:

利用最近XMM-{ \it Newton}软(0.5-2 keV)X射线源(Ebrero et al. 2009 a)的角聚类结果,我们对空间平坦宇宙学模型的主要宇宙学参数进行了严格的约束,这些源具有中值为$z\sim 1$的红移分布。执行一个标准的似然程序,假设一个常数的活动星系核集群演化,活动星系核偏差演化模型Basilakos等。(2008)和$σ_8$的WMAP 5值,我们发现严格的同时约束($Ω_{m}, $ w)平面,与$Ω_{m}= 0.26\pm 0.05$,w $=-0.93^{+0.11}_{-0.19}$。

英文摘要:

We place tight constraints on the main cosmological parameters of spatially flat cosmological models by using the recent angular clustering results of XMM-{\it Newton} soft (0.5-2 keV) X-ray sources (Ebrero et al. 2009a), which have a redshift distribution with a median of $z\sim 1$. Performing a standard likelihood procedure, assuming a constant in comoving coordinates AGN clustering evolution, the AGN bias evolution model of Basilakos et al. (2008) and the WMAP5 value of $σ_8$, we find stringent simultaneous constraints in the ($Ω_{m}, $w) plane, with $Ω_{m}= 0.26\pm 0.05$, w$=-0.93^{+0.11}_{-0.19}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑