Large-Scale Structures in the Chandra Deep Fields

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

The redshift distribution of the X-ray sources identified so far in the Chandra Deep Field South (CDFS) is characterized by several spikes, the most prominent of which are at z = 0.67 and z = 0.73. The clustering properties of the CDFS sources (mainly AGN) and, for comparison, those of the X-ray selected AGN in the 2 Msec Chandra Deep Field North (CDFN) have been measured via the projected correlation function w(rp). The AGN clustering amplitude is found to be a factor of ~ 2 higher in the CDFS than in the CDFN, revealing large cosmic variance in these 0.1 deg2 fields. The high (5 - 10 h-1 Mpc) correlation length measured for AGN at z ~ 1 in the two Chandra Msec fields is comparable to that of early type galaxies at the same redshift.

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