A rich bounty of AGN in the 9 square degree Bootes survey: high-z obscured AGN and large-scale structure

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dc.creatorHickox, R. C.
dc.creatorJones, C.
dc.creatorForman, W. R.
dc.creatorMurray, S. S.
dc.creatorKenter, A.
dc.creatorBrodwin, M.
dc.creatorXBootes, the Chandra
dc.creatorSurvey, NOAO Deep Wide-Field
dc.creatorSurvey, Spitzer IRAC Shallow
dc.creatorTeams, AGES
dc.date2006-11-21
dc.date.accessioned2026-07-07T07:30:54Z
dc.date.available2026-07-07T07:30:54Z
dc.descriptionWe use observations from the 9 square degree multiwavelength survey in Bootes to identify hundreds of obscured active galactic nuclei (AGN) with high redshifts (z > 0.7), luminosities (L_bol > 10^45 ergs/s), and moderate obscuring columns (N_H > 10^22 cm^-2), and to measure the clustering properties of X-ray AGN at z > 1. In the Bootes region, shallow (5 ks) Chandra X-ray observations have detected ~4,000 X-ray sources, and the same region has been mapped with deep optical imaging and by Spitzer IRAC, which detects ~300,000 point sources, of which ~30,000 have detections in all four IRAC bands, for which we can select AGN on the basis of their mid-IR colors. With the MMT/Hectospec we have obtained modest resolution optical spectra for about half the X-ray sources (out to z > 3) and ~20,000 galaxies (out to z = 0.7). With this multiwavelength data we select >400 AGN per square degree (compared to 12 per square degree from SDSS). Among a sample of IRAC-selected AGN we identify 641 candidate obscured objects based on their R band and IRAC luminosities. We use X-ray stacking techniques to verify that they are obscured AGN and measure their absorbing column densities. We also measure the three-dimensional two-point correlation function for X-ray selected AGN.
dc.description5 pages, 3 figures, to appear in the proceedings of "Cosmic Frontiers", Durham, UK, 31 July - 4 August 2006, ASP Conference Series
dc.identifierhttps://arxiv.org/abs/astro-ph/0611654
dc.identifierhttp://arxiv.org/abs/astro-ph/0611654
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/118561
dc.subjectAstrophysics
dc.titleA rich bounty of AGN in the 9 square degree Bootes survey: high-z obscured AGN and large-scale structure
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