Precision Cosmology from X-ray AGN clustering

Abstract

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 ${\sigma }_8$, we find stringent simultaneous constraints in the (${\Omega }_m,$w) plane, with ${\Omega }_m=0.26\pm 0.05$, w$=-0.93_{-0.19}^{+0.11}$.

Accepted for publication, MNRAS Lett. in press, 5 pages, 2 figures

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Cited by in corpus (5)

• A Strategy to Measure the Dark Energy Equation of State using the HII galaxy Hubble Relation & X-ray AGN Clustering: Preliminary Results
• Angular correlation functions of X-ray point-like sources in the full exposure XMM-LSS field
• Breaking the sigma_8-Omega_m degeneracy using the clustering of high-z X-ray AGN
• Precision Cosmology from X-ray AGN clustering
• Comparison of the linear bias models in the light of the Dark Energy Survey