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

VIGNALI, CRISTIAN, POZZI, FRANCESCA, CIVANO, FRANCESCA MARIA, BRUSA, MARCELLA, Comastri A., Pozzetti L., Mignoli M., Gruppioni C., Zamorani G., Lari C., Fiore F., Maiolino R.

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Abstract

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 preliminary 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 µm to estimate bolometric corrections, black hole masses, and Eddington ratios.

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What this paper is about

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 preliminary 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 µm to estimate bolometric corrections, black hole masses, and Eddington ratios.

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Available abstract

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 preliminary 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 µm to estimate bolometric corrections, black hole masses, and Eddington ratios.

Key concepts: Physics, Astrophysics, Quasar, Active galactic nucleus, Redshift, Luminosity, Black hole (networking), Astronomy

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The obscured X-ray source population in the HELLAS2XMM survey: the Spitzer view — Research Paper | ScholarLens