The remarkable X-ray spectrum of the Broad-Line Radio Galaxy 3C 445

Abstract

We present the results of the analysis of an archival 15 ks XMM-Newton observation of the nearby (z=0.057) radio-loud source 3C445, optically classified as a Broad-Line Radio Galaxy. While the RGS data are of insufficient quality to allow a meaningful analysis, the EPIC data show a remarkable X-ray spectrum. The 2-10 keV continuum is described by a heavily absorbed (Nh~ 1e22 - 1e23 cm-2) power law with photon index Gamma ~1.4, and strong (R~2) cold reflection. A narrow, unresolved Fe Kalpha emission line is detected, confirming previous findings, with EW 120eV. A soft excess is present below 2 keV over the extrapolation of the hard X-ray power law, which we model with a power law with the same photon index as the hard power law, absorbed by a column density Nh=6e20 cm-2 in excess to Galactic. A host of emission lines are present below 2 keV, confirming previous indications from ASCA, due to H- and He-like O, Mg, and Si. We attribute the origin of the lines to a photoionized gas, with properties very similar to radio-quiet obscured AGN. Two different ionized media, or a single stratified medium, are required to fit the soft X-ray data satisfactorily. The similarity of the X-ray spectrum of 3C445 to Seyferts underscores that the central engines of radio-loud and radio-quiet AGN similarly host both cold and warm gas.

arXiv comment32 pages, 3 figures, 2 tables, accepted for publication in ApJ

References in corpus (28)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Unified Schemes for Radio-Loud Active Galactic Nuclei
• Dynamics of line-driven disk winds in Active Galactic Nuclei
• ASCA observations of Seyfert 1 galaxies: II. Relativistic Iron K-alpha emission
• An X-ray spectral study of 24 type-1 AGN
• The AGN Obscuring Torus -- End of the "Doughnut" Paradigm?
• A 3 dimensional diagnostic diagram for Seyfert 2s: probing X-ray absorption and Compton thickness
• A high velocity ionised outflow and XUV photosphere in the narrow emission line quasar PG1211+143
• XMM-Newton Reflection Grating Spectrometer Observations of Discrete Soft-X-ray Emission Features from NGC 1068
• A Massive X-Ray Outflow from the Quasar PDS 456
• Chandra Detects Relativistic Broad Absorption Lines from APM 08279+5255
• X-ray reflection spectra from ionized slabs
• The soft X-ray/NLR connection: a single photoionized medium?
• Decelerating Flows in TeV Blazars: A Resolution to the BL Lac -- FR I Unification Problem
• An X-ray Spectral Survey of Radio-Loud AGN With ASCA
• Radiative Transfer and Acceleration in Magnetocentrifugal Winds
• ASCA observations of type-2 Seyfert galaxies: II. The Importance of X-ray Scattering and Reflection
• Testing the Unified Model with an Infrared Selected Sample of Seyfert Galaxies
• BeppoSAX view of radio-loud Active Galactic Nuclei
• The nature of the optical---radio correlations for powerful radio galaxies
• The ASCA X-Ray Spectrum Of The Broad-Line Radio Galaxy Pictor A: A Simple Power Law With No Fe K-alpha Line
• The complex X-ray spectrum of NGC 4507
• Mutiwavelength Observations of Radio Galaxy 3C 120 with XMM-Newton
• The XMM-Newton View of the Broad-Line Radio Galaxy 3C 120
• A Simultaneous RXTE and XMM-Newton Observation of the Broad-Line Radio Galaxy 3C 111
• The nature of a broad line radio galaxy: Simultaneous RXTE and Chandra HETG observations of 3C 382
• Constraining the central engine of radio-loud AGNs
• 1WGA J2223.7-0206: a Narrow-Line Quasi-Stellar Object in the XMM-Newton field of view of 3C445

Cited by in corpus (24)

• The active nuclei of z<1.0 3CRR radio sources
• Ultra-fast outflows in radio-loud active galactic nuclei
• Discovery of ultra-fast outflows in a sample of Broad Line Radio Galaxies observed with Suzaku
• The mid IR -- hard X-ray correlation in AGN and its implications for dusty torus models
• The X-ray to [Ne V]3426 flux ratio: discovering heavily obscured AGN in the distant Universe
• Broad Line Radio Galaxies Observed with Fermi-LAT: The Origin of the GeV Gamma-Ray Emission
• Structure of the Accretion Flow in Broad-Line Radio Galaxies: The Case of 3C390.3
• Chandra detection of a parsec scale wind in the Broad Line Radio Galaxy 3C 382
• First high-resolution detection of a warm absorber in the Broad Line Radio Galaxy 3C 382
• Extended soft X-ray emission in 3CR radio galaxies at z < 0.3: High Excitation and Broad Line Galaxies
• Warm Absorber Energetics in Broad Line Radio Galaxies
• The column density distribution of hard X-ray radio galaxies
• Chandra high resolution spectroscopy of the circumnuclear matter in the Broad Line Radio Galaxy 3C445
• Chandra Observations of the Radio Galaxy 3C 445 and the Hotspot X-ray Emission Mechanism
• NuSTAR hard X-ray spectra of radio galaxies
• 3C 33: another case of photoionized soft X-ray emission in radio galaxies
• Evidence for a circum-nuclear and ionised absorber in the X-ray obscured BroadLine Radio Galaxy 3C 445
• Heavy absorption and soft X-ray emission lines in the XMM-Newton spectrum of the Type 2 radio-loud quasar 3C 234
• A broad-band spectral analysis of eight radio loud type 1 AGN selected in the hard X-ray band
• The High Energy view of the Broad Line Radio Galaxy 3C 111
• The SWIRE/Chandra Survey: The X-ray Sources
• Broadband X-ray spectrum of the newly discovered broad line radio galaxy IGR J21247+5058
• The clumpy torus around type II AGN as revealed by X-ray fluorescent lines
• Analysis of the 3C445 Soft X-ray Spectrum as Observed by Chandra high-energy gratings