The obscured X-ray source population in the HELLAS2XMM survey: the Spitzer view
Abstract
Recent X-ray surveys have provided a large number of high-luminosity, obscured Active Galactic Nuclei (AGN), the so-called Type 2 quasars. Despite the large amount of multi-wavelength supporting data, the main parameters related to the black holes harbored in such AGN are still poorly known. Here we present the results obtained for a sample of eight Type 2 quasars in the redshift range 0.9-2.1 selected from the HELLAS2XMM survey, for which we used Ks-band, Spitzer IRAC and MIPS data at 24 micron to estimate bolometric corrections, black hole masses, and Eddington ratios.
Cite
@article{arxiv.0704.1300,
title = {The obscured X-ray source population in the HELLAS2XMM survey: the Spitzer view},
author = {C. Vignali and Francesca Pozzi and A. Comastri and L. Pozzetti and M. Mignoli and C. Gruppioni and G. Zamorani and C. Lari and F. Civano and M. Brusa and F. Fiore and R. Maiolino},
journal= {arXiv preprint arXiv:0704.1300},
year = {2009}
}
Comments
6 pages, to appear in "The Multicoloured Landscape of Compact Objects and their Explosive Progenitors: Theory vs Observations" (Cefalu, Sicily, June 2006). Eds. L. Burderi et al. (New York: AIP)