X-rays from the Type II quasar in the hyperluminous infrared galaxy IRAS F15307+3252

Abstract

We report the detection of X-ray emission from the hyperluminous infrared galaxy IRAS F15307+3252 at z=0.93 and its properties obtained from XMM-Newton observations. Although the X-ray emission is very faint and the data are noisy, a prominent line-like feature in the observed 3-4 keV range is inferred from both photometric and spectroscopic techniques. It indicates an X-ray spectrum dominated by 6.4 keV Fe K emission and the presence of a Compton-thick AGN. Our estimate of the luminosity of the illuminating source (L(2-10keV)>=1e45 erg/s), required to produce the observed Fe K emission in reflection from cold matter, means that the hidden quasar nucleus accounts for a significant fraction of the large bolometric luminosity. The soft X-ray emission below 2 keV is found to be spatially extended and probably of a separate origin. The temperature and bolometric luminosity (kT=2 keV and L(bol,CL)=1e44 erg/s) obtained from a thermal spectrum place this X-ray source on the L-Tx relation of galaxy clusters. The possible association with a galaxy cluster can be added to the list of remarkable similarities between IRAS F15307+3252 and another hyperluminous infrared galaxy IRAS 09104+4109 (z=0.44), both of which have bolometric luminosities dominated by hidden quasar nuclei. Our result on IRAS F15307+3252 illustrates how difficult it is to detect Compton thick Type II quasars at z>=1, particularly if their bolometric outputs do not rival the hyperluminous population.

arXiv comment5 pages, 4 figures, accepted for publication in MNRAS Letters

References in corpus (23)

• The slope of the black-hole mass versus velocity dispersion correlation
• Measuring the black hole masses of high redshift quasars
• PAHs as a tracer of star formation?
• Spectroscopic Redshifts to z > 2 for Optically Obscured Sources Discovered with the Spitzer Space Telescope
• Hyperluminous Infrared Galaxies
• A Gravitational Lens Solution for IRAS F10214+4724
• Clustering of galaxies around radio quasars at 0.5 < z < 0.8
• ASCA Compilation of X-Ray Properties of Hot Gas in Elliptical Galaxies and Galaxy Clusters: Two Breaks in the Temperature Dependences
• Extreme X-ray Behavior of the Low-Luminosity Active Nucleus in NGC 4395
• The FIRST Sample of Ultraluminous Infrared Galaxies at High Redshift I. Sample and Near-IR Morphologies
• Observations of Hyperluminous Infrared Galaxies with the Infrared Space Observatory: Implications for the origin of their extreme luminosities
• Chandra detection of reflected X-ray emission from the type 2 QSO in IRAS 09104+4109
• Radio-quiet quasar environments at 0.5 < z < 0.8
• Relations Between Environments of Quasars and Galaxy Formation
• NIR Spectroscopy and a Search for CO Emission in Three Extremely Luminous IRAS Sources; IR 09105+4108, IR 15307+3252, and PG 1634+706
• ROSAT HRI observations of IRAS P09104+4109: a massive cooling flow
• XMM-Newton observations of two hyperluminous IRAS galaxies: Compton-thick quasars with obscuring starbursts
• Limits on the X-ray emission from several hyperluminous IRAS galaxies
• A Chandra observation of the z=2.285 galaxy FSC10214+4724: Evidence for a Compton-thick quasar?
• CO (J = 4 --> 3) and 650 Micron Continuum Observations of z=0.93 Hyperluminous Infrared Galaxy FSC 15307+3252
• The environments of hyperluminous infrared galaxies at 0.44<z<1.55
• On the lack of cold dust in IRAS P09104+4109 and IRAS F15307+3252 -- their spectral energy distributions and implications for finding dusty AGNs at high redshift
• IRAS FSC 15307+3252 -- Gravitationally Lensed Seyfert or Cannibal Elliptical at $z$ = 0.93?

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• The XMM Deep survey in the CDFS I. First results on heavily obscured AGN
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• The SCUBA Half-Degree Extragalactic Survey (SHADES) - VIII. The Nature of Faint Submm Galaxies in SHADES, SWIRE and SXDF Surveys
• Millimeter Interferometric Investigations of the Energy Sources of Three Ultraluminous Infrared Galaxies, UGC 5101, Mrk 273, and IRAS 17208-0014, based on HCN to HCO+ Ratios
• The rapid evolution of AGN feedback in brightest cluster galaxies: switching from quasar-mode to radio-mode feedback
• Discovery of strong Iron Kα emitting Compton thick quasars at z=2.5 and 2.9
• Suzaku observations of hard X-ray selected Seyfert 2 galaxies
• X-ray Constraints on the AGN Properties in Spitzer-IRS identified z~2 Ultraluminous Infrared Galaxies
• A Compton Thick AGN Powering the Hyperluminous Infrared Galaxy IRAS 00182--7112
• On the nature of the absorber in IRAS 09104+4109: the X-ray and mid-infrared view
• The Geometry of the Infrared and X-ray Obscurer in a Dusty Hyperluminous Quasar
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• Suzaku observations of the type 2 QSO in the central galaxy of the Phoenix cluster
• An XMM-Newton study of Hyper-Luminous Infrared Galaxies
• Analysis of Spitzer-IRS spectra of hyperluminous infrared galaxies
• Heavy absorption and soft X-ray emission lines in the XMM-Newton spectrum of the Type 2 radio-loud quasar 3C 234
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• Chandra X-ray observations of the hyper-luminous infrared galaxy IRAS F15307+3252
• The possible detection of high redshift Type II QSOs in deep fields
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