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X-Ray Selected Type 2 QSOs and Their Host Galaxies

Published online by Cambridge University Press:  03 June 2010

Vincenzo Mainieri
Vincenzo Mainieri
Affiliation:
ESO, Karl-Schwarschild-Strasse 2, D–85748 Garching bei München, Germany Email: vmainier@eso.org
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Abstract

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We present a large sample of X-ray selected type 2 QSOs from the XMM–COSMOS survey. Type 2 QSOs are luminous AGN whose central engines are obscured by large amounts of gas and dust. The selection criteria we have used are based on high X-ray luminosity (LX > 1044 erg s−1) and heavy obscuration (NH > 1022 cm−2). We derived stellar masses and star-formation rate estimates for the host galaxies from the best fit of the observed photometry. Type 2 QSOs are generally hosted in massive galaxies with on-going star formation.

Keywords

galaxies: activequasars: generalX-rays: general

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