Computer Science
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sacm.confe..15v&link_type=abstract
The Starburst-AGN Connection under the Multiwavelength Limelight, held 14-16 September 2011. Published online at http://www.scio
Computer Science
Scientific paper
We present the properties of a sample of Type 2 AGN at z~1 selected by means of their [NeV]3426 emission line in the zCOSMOS bright survey. We use the ratio between the 2-10 keV flux and the [NeV] emission-line flux as a diagnostic tool to discover heavily obscured, possibly Compton-thick AGN, as recently done at brighter magnitudes in the SDSS. While Compton-thick absorption is suggested in some objects directly from their Chandra spectra, average X-ray properties are derived for most of our sources via summed spectra and stacking analysis. The quest for obscured quasars at z~1 is relevant to place constraints on the number density of Compton-thick AGN in a redshift interval close to the predicted peak of the missing X-ray background population at 20~keV. We also present tentative evidence for enhanced star formation in our obscured quasars, which is consistent with current popular scenarios of BH-galaxy co-evolution.
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