Cosmological Parameters from the Clustering of AGN
We attempt to put constraints on different cosmological and biasing models by combining the recent clustering results of X-ray sources in the local (z ≤ 0.1) and distant universe (z ∼ 1). To do this we compare the measured angular correlation function for bright  and faint  ROSATX-ray sources respectively with those expected in three spatially flat cosmological models. Taking into account the different functional forms of the bias evolution, we find that a low-Ωo cosmological model (ΩA = 0.7) which contains high usas τ 8 mass = 1.13 with different bias behaviour, best reproduce the AGN clustering results. While τCDM models with different bias behaviour are ruled out at a high significance level.
Keywordsgalaxies clustering-X-raysources-cosmology theory-large-scale structure of universe
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- Peebles P.J.E., 1993, Principles of Physical Cosmology, Princeton University Press, Princeton New JerseyGoogle Scholar