On X-ray variability in narrow line and broad line AGNs

Abstract

We assembled a sample of broad line and narrow lines AGNs observed by ASCA, whose excess variances have been determined. The central black hole masses in this sample can be obtained from the reverberation mapping method and the width of H$\beta$ emission line. Using the black hole masses and the bolometric luminosity, the Eddington ratio can also be obtained. We confirmed the strong anti-correlation between X-ray variability and the central black mass founded by Lu & Yu. We further found that narrow line Seyfert 1 galaxies (NLS1s) also follow this relation with a larger scatter and there is only a weak correlation between the X-ray variability and the Eddington ratio, which suggest that rapid variability and narrow lines in NLS1s are mainly due to small central black holes in NLS1s, not the difference of circumnuclear gas around NLS1s. A strong correlation was found between the hard X-ray photon index and the Eddington ratio. If the suggestion of two distinct accretion classes, namely ADAF and thin disk accretion, in AGNs (Lu & Yu) is correct, the strong photon index-Eddington ration correlation showed that there exists a kind of two zone accretion disk, in which the outer zone is a thin disk, and the inner zone is an ADAF disk. Otherwise, the accretion process is the thin disk accretion and the ADAF accretion is not required.

5 pages, 4 figures, accepted for publication in MNRAS Letters

References in corpus (11)

• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Advection-Dominated Accretion and the Spectral States of Black Hole X-Ray Binaries: Application to Nova Muscae 1991
• AGN Black Hole Masses and Bolometric Luminosities
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei: I. Comparing the Photoionization and Reverberation Techniques
• A Comprehensive Spectral and Variability Study of Narrow-Line Seyfert 1 Galaxies Observed by ASCA: I. Observations and Time Series Analysis
• On X-ray Variability in Seyfert Galaxies
• Black hole mass and velocity dispersion of narrow line region in active galactic nuclei and narrow line Seyfert 1 galaxies
• X-ray Variability as a Probe of Advection-Dominated Accretion in Low-Luminosity AGN
• Two Different Accretion Classes in Seyfert 1 Galaxies and QSOs
• The relationship between the X-ray variability and the central black hole mass
• Masses, Accretion Rates and Inclinations of AGNs

Cited by in corpus (64)

• Unification of X-ray winds in Seyfert galaxies: from ultra-fast outflows to warm absorbers
• Discovery of a relation between black hole mass and soft X-ray time lags in active galactic nuclei
• CAIXA: a Catalogue of AGN In the XMM-Newton Archive I. Spectral analysis
• A global look at X-ray time lags in Seyfert Galaxies
• CAIXA: a catalogue of AGN in the XMM-Newton archive III. Excess Variance Analysis
• Evidence for ultra-fast outflows in radio-quiet AGNs: III - location and energetics
• A soft X-ray study of Type I AGN observed with Chandra HETGS
• X-ray Absorption and Reflection in Active Galactic Nuclei
• The scaling of the X-ray variability with black hole mass in AGN
• A Stochastic Model for the Luminosity Fluctuations of Accreting Black Holes
• Discovery of high-frequency iron K lags in Ark 564 and Mrk 335
• The relationship between X-ray variability amplitude and black hole mass in active galactic nuclei
• An Expanded RXTE Survey of X-ray Variability in Seyfert 1 Galaxies
• A NuSTAR census of coronal parameters in Seyfert galaxies
• Super-Eddington accreting massive black holes as long-lived cosmological standards
• On the origin of the Fe K-alpha line cores in Active Galactic Nuclei
• Calibrating the correlation between black hole mass and X-ray variability amplitude: X-ray only black hole mass estimates for active galactic nuclei and ultra-luminous X-ray sources
• Relativistic reverberation in the accretion flow of a tidal disruption event
• Quasar Black Hole Mass Estimates in the Era of Time Domain Astronomy
• A comprehensive analysis of the hard X-ray spectra of bright Seyfert galaxies
• The remarkable X-ray variability of IRAS 13224-3809 I: The variability process
• Detection of a possible X-ray Quasi-periodic Oscillation in the Active Galactic Nucleus 1H~0707-495
• XMM-Newton View of PKS 2155-304: Characterizing the X-ray Variability Properties with EPIC-PN
• Black hole mass estimation from X-ray variability measurements in AGN
• The X-Ray Variability of a Large, Serendipitous Sample of Spectroscopic Quasars
• The black hole--bulge relation in AGNs
• Broadband study of hard X-ray selected absorbed AGN
• NLS1 galaxies and estimation of their central black hole masses from the X-ray excess variance method
• Black hole masses in narrow-line Seyfert 1 galaxies
• The Energy-dependent X-ray Timing Characteristics of the Narrow Line Seyfert 1 Mkn 766
• A Suzaku sample of unabsorbed narrow-line and broad-line Seyfert 1 galaxies: I. X-ray spectral properties
• Consistency of the black hole mass determination in AGN from the reverberation and the X-ray excess variance method
• The Compton hump and variable blue wing in the extreme low-flux NuSTAR observations of 1H0707-495
• The Close AGN Reference Survey (CARS): IFU survey data and the BH mass dependence of long-term AGN variability
• A New Sample of Candidate Intermediate-Mass Black Holes Selected by X-ray Variability
• Probing variability patterns of the Fe K line complex in bright nearby AGNs
• Evidence for an Untruncated Accretion Disk in the Broad-Line Radio Galaxy 4C+74.26
• NuSTAR spectral analysis of two bright Seyfert 1 galaxies: MCG +8-11-11 and NGC 6814
• XMM-Newton observation of the bright Seyfert 1 galaxy, MCG+8-11-11
• The longest timescale X-ray variability reveals an evidence for active galactic nuclei in the high accretion state
• Kepler light curve analysis of the blazar W2R 1926+42
• Circumnuclear star formation in Mrk 42 mapped with Gemini Near-infrared Integral Field Spectrograph
• Update on the X-ray variability plane for active galactic nuclei: The role of the obscuration
• Hot Corona Properties of Swift/BAT detected AGN
• Extended Corona Models of X-ray Reverberation in the AGN 1H~0707-495 and IRAS 13224-3809
• The relation between the optical spectral slope and the luminosity for 17 Palomar-Green QSOs
• Continuum optical-UV and X-ray variability of AGN: current results and future challenges
• BASS-XL: X-ray variability properties of unobscured Active Galactic Nuclei
• X-ray timing and spectral analysis of reverberating active galactic nuclei
• X-ray properties of the quasar HE0450-2958
• Predicting the black hole mass and correlations in X-ray reverberating AGN using neural networks
• A Suzaku Observation of MCG-2-58-22: Constraining the Geometry of the Circumnuclear Material
• The broad-band X-ray spectrum of the Seyfert 1 galaxy, MCG+8-11-11
• Frying Doughnuts: What can the reprocessing of X-rays to IR tell us about the AGN environment?
• Exploring the Link between the X-ray Power Spectra and Energy Spectra of Active Galactic Nuclei
• Is the anti-correlation between the X-ray variability amplitude and black hole mass of AGNs intrinsic?
• The ${\sigma }_{\mathrm{H}\beta }$-based dimensionless accretion rate and its connection with the corona for AGN
• Mass Measurements of AGN from Multi-Lorentzian Models of X-ray Variability. I. Sampling Effects in Theoretical Models of the rms^2-M_BH Correlation
• A Systematic Study of the Short-Term X-ray Variability of Seyfert Galaxies I. Diversity of the X-ray Rms Spectra
• UV and X-Ray Variability of the Narrow-Line Seyfert 1 Galaxy Ark 564
• A Systematic Search for X-ray Eclipse Events in Active Galactic Nuclei Observed by Swift
• SDSS J143030.22-001115.1: A misclassified narrow-line Seyfert 1 galaxy with flat X-ray spectrum
• Timing of accreting neutron stars with future X-ray instruments: towards new constraints on dense matter equation of state
• The Relation between the Inclinations of Broad Line Regions and the Accretion Disk