Extending the X-ray luminosity function of AGN to high redshift

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dc.creatorSilverman, J.
dc.creatorGreen, P.
dc.creatorBarkhouse, W.
dc.creatorCameron, R.
dc.creatorKim, M.
dc.creatorKim, D. -W.
dc.creatorWilkes, B.
dc.creatorHasinger, G.
dc.creatorteam, the full ChaMP
dc.date2005-11-18
dc.date.accessioned2026-07-07T06:45:14Z
dc.date.available2026-07-07T06:45:14Z
dc.descriptionX-ray surveys of the extragalactic universe are now able to detect significant numbers of AGN out to high redshift (z~5). We highlight some results from the Chandra Multiwavelength Project (ChaMP) to measure the X-ray luminosity function out to these early epochs. At z > 3, we show that the comoving space density of luminous (log Lx > 44.5) AGN has a behavior similar to the optical QSO luminosity function. With a newly compiled sample of AGN from ChaMP supplemented with those from additional surveys including the Chandra Deep fields, we present a preliminary measure of the luminosity function in the hard (2-8 keV) band. With 37 AGN at z > 3, we continue to see a decline in the space density at high redshift over a wider range in luminosity. We discuss the need to identify a larger sample of obscured AGN at high redshift to determine if an early epoch of hidden supermassive black hole growth occurred.
dc.description6 pages, 4 figures, to appear in Proc. "The X-ray Universe 2005", San Lorenzo de El Escorial, Spain, September 2005
dc.identifierhttps://arxiv.org/abs/astro-ph/0511552
dc.identifierhttp://arxiv.org/abs/astro-ph/0511552
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/102993
dc.subjectAstrophysics
dc.titleExtending the X-ray luminosity function of AGN to high redshift
dc.typetext

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