The relationship between the X-ray variability and the central black hole mass

Abstract

We assembled a sample of Seyfert 1 galaxies, QSOs and Low-Luminosity Active Galactic Nuclei (LLAGNs) observed by ASCA, whose central black hole masses have been measured. We found that the X-ray variability (which is quantified by the ``excess variance'' sigma^2_{rms}) is significantly anti-correlated with the central black hole mass, and there likely exists a linear relationship sigma^2_{rms}\propto M^{-1}_{bh}. This can be interpreted that the short time-scale X-ray variability is caused by some global coherent variations in the X-ray emission region which is scaled by the size of the central black hole. Hence, the central black hole mass is the driving parameter of the previously established relation between X-ray variability and luminosity. This findings favor the hypothesis that the Narrow Line Seyfert 1 galaxies and QSOs harbor smaller black holes than the broad line objects, and can also easily explain the observational fact that high redshift QSOs have greater variability than local AGNs at a given luminosity. Further investigations are needed to confirm our findings, and a large sample X-ray variability investigation can give constraints on the physical mechanism and evolution of AGNs.

7 pages (including two tables and one figure)

References in corpus (22)

• A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
• The Demography of Massive Dark Objects in Galaxy Centres
• A Relationship Between Nuclear Black Hole Mass and Galaxy Velocity Dispersion
• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei: I. Comparing the Photoionization and Reverberation Techniques
• Black Hole Mass Estimates from Reverberation Mapping and from Spatially Resolved Kinematics
• Keplerian Motion of Broad-Line Region Gas as Evidence for Supermassive Black Holes in Active Galactic Nuclei
• Narrow Line Seyfert 1 Galaxies and the Evolution of Galaxies & Active Galaxies
• A Comprehensive Spectral and Variability Study of Narrow-Line Seyfert 1 Galaxies Observed by ASCA: I. Observations and Time Series Analysis
• Black Hole Mass, Velocity Dispersion and the Radio Source in AGN
• The Properties of Poor Groups of Galaxies: III. The Galaxy Luminosity Function
• A Cutoff in the X-ray Fluctuation Power Density Spectrum of the Seyfert 1 Galaxy NGC 3516
• On X-ray Variability in Seyfert Galaxies
• Possible Evidence for Truncated Thin Disks in the Low-Luminosity Active Galactic Nuclei M81 and NGC 4579
• A multi-wavelength study of the Seyfert 1 galaxy MCG-6-30-15
• What is the Accretion Rate in NGC 4258?
• X-ray Variability as a Probe of Advection-Dominated Accretion in Low-Luminosity AGN
• Distribution and Kinematics of the Circum-nuclear Molecular Gas in the Seyfert 1 Galaxy NGC 3227
• ASCA PV observations of the Seyfert 1 galaxy MCG-6-30-15 : rapid variability of the warm absorber
• The Ultraviolet Peak of the Energy Distribution in 3C~273: Evidence for an Accretion Disk and Hot Corona Around a Massive Black Hole
• The X-ray Spectral Variability of the Seyfert Galaxy NGC 3227
• Implications of the X-ray Variability for the Mass of MCG-6-30-15

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• CAIXA: a catalogue of AGN in the XMM-Newton archive III. Excess Variance Analysis
• The scaling of the X-ray variability with black hole mass in AGN
• A Stochastic Model for the Luminosity Fluctuations of Accreting Black Holes
• The relationship between X-ray variability amplitude and black hole mass in active galactic nuclei
• Long-term variability of AGN at hard X-rays
• 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
• The XMM-Newton view of AGN with intermediate mass black holes
• On X-ray variability in narrow line and broad line AGNs
• Quasar Black Hole Mass Estimates in the Era of Time Domain Astronomy
• Black hole mass estimation from X-ray variability measurements in AGN
• A new cosmological distance measure using AGN X-ray variability
• Observational evidence for the link between the variable optical continuum and the subparsec-scale jet of the radio galaxy 3C 390.3
• High-frequency X-ray variability as a mass estimator of stellar and supermassive black holes
• NLS1 galaxies and estimation of their central black hole masses from the X-ray excess variance method
• Evidence for variability timescale dependent UV/X-ray delay in Seyfert 1 AGN NGC 7469
• Exploratory X-ray Monitoring of Luminous Radio-Quiet Quasars at High Redshift: Initial Results
• A New Sample of Candidate Intermediate-Mass Black Holes Selected by X-ray Variability
• Masses, Accretion Rates and Inclinations of AGNs
• Gas Metallicity of Narrow-Line Regions in Narrow-Line Seyfert 1 Galaxies and Broad-Line Seyfert 1 Galaxies
• X-ray and multiwavelength view of NGC 4278. A LINER-Seyfert connection?
• Long term γ -ray variability of blazars
• Characterization of Variability in Blazar Light curves
• Low-Mass Active Galactic Nuclei with Rapid X-Ray Variability
• The Extreme Super-Eddington NLS1 RX J0134.2-4258 -- II. A Weak-Line Seyfert Linking to the Weak-Line Quasar
• Kepler light curve analysis of the blazar W2R 1926+42
• The longest timescale X-ray variability reveals an evidence for active galactic nuclei in the high accretion state
• Independent Black Hole Mass Estimation for the γ-ray Detected Archetypal Narrow-Line Seyfert 1 Galaxy 1H 0323+342 from X-ray Variability
• BASS-XL: X-ray variability properties of unobscured Active Galactic Nuclei
• Continuum optical-UV and X-ray variability of AGN: current results and future challenges
• X-ray properties of the quasar HE0450-2958
• Multi-wavelength Campaign on the Super-Eddington NLS1 RX J0134.2-4258 -- I. Peculiar X-ray Spectra and Variability
• Applying wavelet analysis to the X-ray light curves of active galactic nuclei and quasi-periodic eruptions
• The non-linear X-ray/UV relation in active galactic nuclei: contribution of instrumental effects on the X-ray variability
• Examining AGN UV/Optical Variability Beyond the Simple Damped Random Walk. II. Insights from 22 Years Observations of SDSS, PS1 and ZTF
• Is the anti-correlation between the X-ray variability amplitude and black hole mass of AGNs intrinsic?
• Long-term hard X-ray variability properties of Swift-BAT blazars
• Characterising X-ray variability in light curves with complex sampling patterns: application to the eROSITA south ecliptic pole survey
• 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
• Prospects for Time-Domain and Multi-Messenger Science with eXTP
• X-ray Eclipses of Active Galactic Nuclei
• Swift Monitoring Observations of Mrk 231: Detection of Ultraviolet Variability
• Characterisation of the X-ray point source variability in the eROSITA south ecliptic pole field
• The shortest detected intra-day variability of active galactic nuclei in TESS survey
• Black hole masses from X-rays