Investigating the complex X-ray spectrum of a broad-line 2MASS red quasar: XMM-Newton observation of FTM 0830+3759

Abstract

We report results from a 50 ks XMM-Newton observation of the dust-reddened broad-line quasar FTM 0830+3759 (z=0.413) selected from the FIRST/2MASS Red Quasar survey. For this AGN, a very short 9 ks Chandra exposure had suggested a feature-rich X-ray spectrum and HST images revealed a very disturbed host galaxy morphology. Contrary to classical, optically-selected quasars, the X-ray properties of red (i.e. with J-Ks> 1.7 and R-Ks> 4) broad line quasars are still quite unexplored, although there is a growing consensus that, due to moderate obscuration, these objects can offer a unique view of spectral components typically swamped by the AGN light in normal, blue quasars. The XMM-Newton observation discussed here has definitely confirmed the complexity of the X-ray spectrum revealing the presence of a cold (or mildly-ionized) absorber with Nh ~10^{22} cm^-2 along the line of sight to the nucleus and a Compton reflection component accompanied by an intense Fe K emission line in this quasar with a Lum(2-10) ~5 x 10^{44} erg/s. A soft-excess component is also required by the data. The match between the column density derived by our spectral analysis and that expected on the basis of reddening due to the dust suggests the possibility that both absorptions occur in the same medium. FTM 0830+3759 is characterized by an extinction/absorption-corrected X-ray-to-optical flux ratio alphaox = -2.3, that is steeper than expected on the basis of its UV luminosity. These findings indicate that the X-ray properties of FTM 0830+3759 differs from those typically observed for optically-selected broad line quasars with comparable hard X-ray luminosity.

Accepted for publication in ApJ

References in corpus (29)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• An XMM-Newton survey of broad iron lines in Seyfert galaxies
• The X-ray-to-Optical Properties of Optically-Selected Active Galaxies Over Wide Luminosity and Redshift Ranges
• Piecing Together the X-ray Background: Bolometric Corrections for Active Galactic Nuclei
• The X-ray Properties of the Most-Luminous Quasars from the Sloan Digital Sky Survey
• Evidence for Quasar Activity Triggered by Galaxy Mergers in HST Observations of Dust-reddened Quasars
• Unveiling obscured accretion in the Chandra Deep Field South
• Optical spectroscopy and X-ray detections of a sample of quasars and AGN selected in the mid-infrared from two Spitzer wide-area surveys
• Spitzer's Contribution to the AGN Population
• On the origin of soft X-rays in obscured AGN: answers from high-resolution spectroscopy with XMM-Newton
• Evidence for Merger Remnants in Early-Type Host Galaxies of Low-Redshift QSOs
• The FIRST-2MASS Red Quasar Survey
• The host galaxies of luminous quasars
• On the Iwasawa-Taniguchi effect of radio-quiet AGN
• The Toroidal Obscuration of Active Galactic Nuclei
• Resolving the innermost parsec of Centaurus A at mid-infrared wavelengths
• The X-ray Energy Dependence of the Relation between Optical and X-ray Emission in Quasars
• XMM-Newton observations of the Narrow-Line Seyfert 1 galaxy Mrk 335 in an historical low X-ray flux state
• Revealing X-ray obscured quasars in SWIRE sources with extreme mid-IR/optical flux ratios
• The Seyfert 1 Galaxy Mrk 335 at a very low flux state: mapping the soft X-ray photoionised gas
• High-resolution X-ray spectroscopy of the low and high states of the Seyfert 1 galaxy NGC 4051 with Chandra LETGS
• Are red 2MASS QSOs young?
• The broad-band XMM-Newton and INTEGRAL spectra of bright type 1 Seyfert galaxies
• A multiwavelength map of the nuclear region of NGC7582
• Differential X-ray Absorption and Dust-To-Gas Ratios of the Lens Galaxies SBS0909+523, FBQS0951+2635, and B1152+199
• An X-ray view of absorbed INTEGRAL AGN
• Chandra Observations of Red Sloan Digital Sky Survey Quasars
• Does the X-ray emission of the luminous quasar RBS 1124 originate in a mildly relativistic outflowing corona?
• Comparison of high and low state X-ray spectra in the Type 1 QSO 2MASS 0918+2117

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