The obscured X-ray source population in the HELLAS2XMM survey: the Spitzer view

Details The obscured X-ray source population in the HELLAS2XMM survey: the Spitzer view The obscured X-ray source population in the HELLAS2XMM survey: the Spitzer view

2007-04-10

arxiv.org/abs/0704.1300v1

AIP Conf.Proc.924:864-869,2007

Astronomy and Astrophysics

Astrophysics

6 pages, to appear in "The Multicoloured Landscape of Compact Objects and their Explosive Progenitors: Theory vs Observations"

Scientific paper

10.1063/1.2774954

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.

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