J/ApJ/740/37: Resource Record Summary

Resource Record Summary

Catalog Service:
Obscured AGN at z~0.5-1 in the CDFS

Short name: J/ApJ/740/37 IVOA Identifier: ivo://CDS.VizieR/J/ApJ/740/37 DOI (Digital Object Identifier): 10.26093/cds/vizier.17400037 Publisher: CDS[+]ivo://CDS[Pub. ID] More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/740/37 VO Compliance: Level 2: This is a VO-compliant resource.	Status: active Registered: 2013 Mar 01 13:05:02Z
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Description

We identify a numerically significant population of heavily obscured AGNs at z~0.5-1 in the Chandra Deep Field-South (CDF-S) and Extended Chandra Deep Field-South by selecting 242 X-ray undetected objects with infrared-based star-formation rates (SFRs) substantially higher (a factor of 3.2 or more) than their SFRs determined from the UV after correcting for dust extinction. An X-ray stacking analysis of 23 candidates in the central CDF-S region using the 4Ms Chandra data reveals a hard X-ray signal with an effective power-law photon index of {Gamma}=0.6^+0.3^_-0.4_, indicating a significant contribution from obscured AGNs. Based on Monte Carlo simulations, we conclude that 74%+/-25% of the selected galaxies host obscured AGNs, within which ~95% are heavily obscured and ~80% are Compton-thick (CT; N_H_>1.5x10^24^cm^-2^).

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