A comparison of hard X-ray photon indices and iron \ka emission lines in X-ray luminous narrow- and broad-line Seyfert 1 galaxies

Abstract

We use publicly available XMM-Newton data to systematically compare the hard X-ray photon indices, ${\Gamma }_{2-10\mathrm{keV}}$ and the iron K$\alpha$ emission lines of narrow-line (NL) and broad-line Seyfert 1 (BLS1) galaxies. We compile a flux-limited ($f_{2-10\mathrm{keV}}\ge 1\times 10^{-12}$ erg s${}^{-1}$ cm${}^{-2}$) sample including 114 radio-quiet objects, with the 2-10 keV luminosity ranging from 10${}^{41}$ to 10${}^{45}$ erg s${}^{-1}$. Our main results are: 1) NLS1s and BLS1s show similar luminosity distributions; 2) The weighted mean of ${\Gamma }_{2-10\mathrm{keV}}$ of NLS1s, BLS1s and the total sample is $2.04\pm 0.04$, $1.74\pm 0.02$, $1.84\pm 0.02$, respectively; a significant anti-correlation between \ga and FWHMH$\beta$ suggests that ${\Gamma }_{2-10\mathrm{keV}}>2.0$ may be taken to indicate X-ray luminous NLS1 type; 3) The 6.4 keV narrow iron K$\alpha$ lines from NLS1s are generally weaker than that from BLS1s; this would indicate a smaller covering factor of the dusty tori in NLS1s, if the line emission originates from the inner boundary region of the dusty torus in an AGN; 4) all the broadened iron K$\alpha$ lines with intrinsic width $\sigma >0.5$ keV correspond to FWHM\hb $\leq 4000 ~\kms$.

References in corpus (16)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• An XMM-Newton survey of broad iron lines in Seyfert galaxies
• Constraining Black Hole Spin Via X-ray Spectroscopy
• Piecing Together the X-ray Background: Bolometric Corrections for Active Galactic Nuclei
• Relativistic X-ray Lines from the Inner Accretion Disks Around Black Holes
• A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
• CAIXA: a Catalogue of AGN In the XMM-Newton Archive I. Spectral analysis
• On the nature of Seyfert galaxies with high [OIII]5007 blueshifts
• Suzaku Observations of Active Galactic Nuclei Detected in the Swift/BAT Survey: Discovery of "New Type" of Buried Supermassive Black Holes
• The effect of radiation pressure on dusty absorbing gas around AGN
• On the Iwasawa-Taniguchi effect of radio-quiet AGN
• On the origin of the Fe K-alpha line cores in Active Galactic Nuclei
• On the X-ray Baldwin effect for narrow Fe Kalpha emission line
• 4U 1344-60: a bright intermediate Seyfert galaxy at z=0.012 with a relativistic Fe Kalpha emission line
• Our Search for an H-R Diagram of Quasars
• X-ray properties of the quasar HE0450-2958

Cited by in corpus (16)

• The soft X-ray excess: NLS1s vs. BLS1s
• A new fundamental plane for radiatively efficient black-hole sources
• SDSSJ143244.91+301435.3: a link between radio-loud narrow-line Seyfert 1 galaxies and compact steep-spectrum radio sources?
• The dusty tori of nearby QSOs as constrained by high-resolution mid-IR observations
• The first simultaneous X-ray broad-band view of Mrk 110 with XMM-Newton and NuSTAR
• Fe II emission in active galactic nuclei
• AGN torus detectability at sub-millimeter wavelengths: What to expect from ALMA continuum data
• Modelling the strongest silicate emission features of local type 1 AGN
• Relativistic Fe K$\alpha$ Line Revealed in the Composite X-ray Spectrum of Narrow Line Seyfert 1 Galaxies --- do their black holes have averagely low or intermediate spins?
• The X-ray emission in young radio AGNs
• Unveiling slim accretion disc in AGN through X-ray and Infrared observations
• Dependence of the broad Fe K$\alpha$ line on the physical parameters of AGN
• A nearby luminous AGN sample optically selected from Hubble Space Telescope (HST)
• A comparative study of the physical properties for a representative sample of Narrow and Broad-line Seyfert galaxies
• Influence of Comptonization region over the ambiance of accretion disc in Active Galactic Nucleus
• A Suzaku sample of unabsorbed narrow-line and broad-line Seyfert 1 galaxies: II. Iron emission and absorption