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-Newton soft (0.5-2keV) X-ray sources, which have a redshift distribution with a median of z ~ 1. Performing a standard likelihood procedure, assuming a constant in comoving coordinates active galactic nuclei (AGN) clustering evolution, the AGN bias evolution model of Basilakos, Plionis & Ragone-Figueroa and the Wilkinson Microwave Anisotropy Probe5 value of σ8, we find stringent simultaneous constraints in the (Ωm, w) plane, with Ωm = 0.26 +/- 0.05, w = -0.93+0.11-0.19.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- November 2009
- DOI:
- 10.1111/j.1745-3933.2009.00762.x
- arXiv:
- arXiv:0909.3919
- Bibcode:
- 2009MNRAS.400L..57B
- Keywords:
-
- cosmological parameters;
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology;
- High Energy Physics - Theory
- E-Print:
- Accepted for publication, MNRAS Lett. in press, 5 pages, 2 figures