Extreme Optical/Mid-IR color cuts have been used to uncover a population of dustenshrouded, mid-IR luminous galaxies at high redshifts. Several lines of evidence point towards the presence of an heavily absorbed, possibly Compton-thick quasar at the heart of these systems. Nonetheless, the X-ray spectral properties of these intriguing sources still remain largely unexplored. Here we present an X-ray spectroscopic study of a large sample of 44 extreme dust-obscured galaxies (EDOGs) with F(24micron)/FR>2000 and F(24micron) > 1.3 mJy selected from a 6 deg2 region in the SWIRE fields. The application of our selection criteria to a wide area survey has been capable of unveiling a population of X-ray luminous, absorbed z>1 quasars which is mostly missed in the traditional optical/X-ray surveys performed so far. Advances in the understanding of the X-ray properties of these recently-discovered sources by Simbol-X observations will be also discussed.

High-z X-ray obscured quasars in galaxies with extreme mid-IR/optical colors

VIGNALI, CRISTIAN;
2009

Abstract

Extreme Optical/Mid-IR color cuts have been used to uncover a population of dustenshrouded, mid-IR luminous galaxies at high redshifts. Several lines of evidence point towards the presence of an heavily absorbed, possibly Compton-thick quasar at the heart of these systems. Nonetheless, the X-ray spectral properties of these intriguing sources still remain largely unexplored. Here we present an X-ray spectroscopic study of a large sample of 44 extreme dust-obscured galaxies (EDOGs) with F(24micron)/FR>2000 and F(24micron) > 1.3 mJy selected from a 6 deg2 region in the SWIRE fields. The application of our selection criteria to a wide area survey has been capable of unveiling a population of X-ray luminous, absorbed z>1 quasars which is mostly missed in the traditional optical/X-ray surveys performed so far. Advances in the understanding of the X-ray properties of these recently-discovered sources by Simbol-X observations will be also discussed.
2009
Simbol-X: focusing on the hard X-ray Universe
231
234
Piconcelli E.; Lanzuisi G.; Fiore F.; Feruglio C.; Vignali C.; Salvato M.; Gruppioni C.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/71685
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