For the analysis and science exploitation of those observations the group is developing novel methods with emphasis on the Bayesian approach, e.g. The group also has heavy involvements in the Chandra Deep Field South and Chandra COSMOS projects. We also use wide area serendipitous surveys such as XMM-SDSS and 2XMM, the latter via our involvement in the XMM Science Survey Centre. 1), the XMM deep observation of the Lockman Hole, the Chandra AEGIS-wide and AEGIS-deep programmes. It is well known that, for the study of AGN, X-rays have merits over other selection techniques, primarily a uniform and quantifiable selection function at all redshifts, relatively little attenuation by absorbing material along the line of sight, and minimal host galaxy light dilution. The MPE HE group has a leading role in the science exploitation of nearly all current high-profile extragalactic surveys carried out by major high energy missions, including Chandra, XMM-Newton, Swift and Integral. Members of the group held the leadership in the XMM-COSMOS survey (see Fig. A false colour XMM-Newton X-ray image of the COSMOS field (2 sq deg.) ![]() An example of one of the X-ray surveys to which we contribute to. From X-ray surveys to AGN demographicsįig. Investigating whether and how nuclear black holes influence their host galaxies, and vice versa, has been and remains to be a major focus in the activity of the MPE HE Group. X-ray emission offers a unique signpost of accretion of matter onto the supermassive black holes in AGN, being able to penetrate through obscuring material and overcome light from stellar processes. Because the cosmological growth of SMBHs is mostly due to accretion of matter during active phases and the energy released in the process of accretion can be higher than the total binding energy of a massive galaxy, active galactic nuclei (AGN) can in principle have a profound effect on the galaxy formation and evolution processes. ![]() In the past decade, studies of the local Universe have established the presence of supermassive black holes (SMBH) in the nuclei of virtually all galaxies with a bulge/spheroidal component, dramatically changing our perception of this class of objects, and implying a clear relationship between the growth of SMBH and that of the galaxy.
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