ar X iv : a st ro - p h / 04 03 64 6 v 1 28 M ar 2 00 4 X - ray Survey Results on Active Galaxy Physics and Evolution
نویسنده
چکیده
The cosmic X-ray background (XRB) is largely due to accretion onto supermassive black holes integrated over cosmic time. Thus, extragalactic X-ray surveys offer the potential to contribute substantially to our understanding of the physics of Active Galactic Nuclei (AGN) as well as the evolution of the AGN population. Such surveys have dramatically advanced over the past four years, largely due to the flood of data from the Chandra X-ray Observatory (hereafter Chandra) and the X-ray Multi-Mirror Mission-Newton (hereafter XMM-Newton). The superb X-ray mirrors and charge-coupled device (CCD) detectors on these observatories provide
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