VLT/ISAAC Spectra of the H-beta Region in Intermediate-Redshift Quasars II. Black Hole Mass and Eddington Ratio

Abstract

We derive black hole masses for a sample of about 300 AGNs in the redshift range 0 < z < 2.5. We use the same virial velocity measure (FWHM Hbeta broad component) for all sources which represents a significant improvement over previous studies. We review methods and caveats for determining AGN black hole masses via the virial assumption for motions in the gas producing low ionization broad emission lines. We derive a corrected FWHM measure for the broad component of H-beta that better estimates the virialized line emitting component by comparing our FWHM measures with a sample of reverberated sources with H-beta radial velocity dispersion measures. We also consider the FWHM of the FeII 4570 blend as a potential alternative velocity estimator. We find a range of black hole mass between log M ~ 6 - 10, where the black hole mass M is in solar masses. Estimates using corrected FWHM, as well as FWHM(Fe II) measures, reduce the number of sources with log M > 9.5 and suggest that extremely large M values (log M >~ 10) may not be realistic. Derived Eddington ratio values values show no evidence for a significant population of super-Eddington radiators especially after correction is made for sources with extreme orientation to our line of sight. Sources with FWHM(Hbeta broad component) <~ 4000 km/s show systematically higher Eddington ratio and lower M values than broader lined AGNs (including almost all radio-loud sources).

arXiv commentAccepted for publication in Astronomy & Astrophysics

References in corpus (51)

• A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
• 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. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• The Relation between Black Hole Mass, Bulge Mass, and Near-Infrared Luminosity
• Determining Central Black Hole Masses in Distant Active Galaxies and Quasars. II. Improved Optical and UV Scaling Relationships
• The Relationship Between Luminosity and Broad-Line Region Size in Active Galactic Nuclei
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei: I. Comparing the Photoionization and Reverberation Techniques
• Supermassive Black Holes in Active Galactic Nuclei. II. Calibration of the M-sigma Relationship for AGNs
• The 2dF QSO Redshift Survey - I. The Optical QSO Luminosity Function
• The cosmological evolution of quasar black-hole masses
• Determining Central Black Hole Masses in Distant Active Galaxies
• Early-type galaxies in the SDSS. III. The Fundamental Plane
• Keplerian Motion of Broad-Line Region Gas as Evidence for Supermassive Black Holes in Active Galactic Nuclei
• Broad Emission Line Shifts in Quasars: An Orientation Measure for Radio-Quiet Quasars?
• Eigenvector 1: An Optimal Correlation Space for Active Galactic Nuclei
• Narrow Line Seyfert 1 Galaxies and the Evolution of Galaxies & Active Galaxies
• Evidence for Supermassive Black Holes in Active Galactic Nuclei from Emission-Line Reverberation
• The black-hole masses of Seyfert galaxies and quasars
• Long-term optical variability properties of the Palomar-Green quasars
• A spectrophotometric atlas of Narrow-Line Seyfert 1 galaxies
• The velocity dispersion function of early-type galaxies
• Near Infrared Spectroscopy of High Redshift Active Galactic Nuclei. I. A Metallicity-Accretion Rate Relationship
• On the evolution of the black hole:spheroid mass ratio
• Searching for the Physical Drivers of the Eigenvector 1 Correlation Space
• Systematic Errors in the Estimation of Black Hole Masses by Reverberation Mapping
• Quasars and the Big Blue Bump
• The relationship between radio luminosity and black-hole mass in optically-selected quasars
• Probing the Coevolution of Supermassive Black Holes and Quasar Host Galaxies
• Average Quasar Spectra in the Context of Eigenvector 1
• On The Linearity of The Black Hole - Bulge Mass Relation in Active and in Nearby Galaxies
• Searching For the Physical Drivers of Eigenvector 1: Influence of Black Hole Mass and Eddington Ratio
• The Profiles of H-Beta and [OIII] 5007 in Radio-Loud Quasars
• Evolution of Active Galaxies: Black-hole Mass - Bulge relations for Narrow Line Objects
• Kinematic Linkage Between the Broad and Narrow Line Emitting Gas in AGN
• The relation between black hole mass and velocity dispersion at z~0.37
• Does the Narrow [O III] 5007 Line Reflect the Stellar Velocity Dispersion in AGN?
• The largest black holes and the most luminous galaxies
• A Statistical Study of Rest-frame Optical Emission Properties in Luminous Quasars at 2.0 < z < 2.5
• Disentangling microlensing and differential extinction in the double QSO HE0512-3329
• VLT/ISAAC Spectra of the H-beta Region in Intermediate Redshift Quasars
• The Demise of the Classical BLR in the Luminous Quasar PG1416-129
• The role of black hole mass in quasar radio activity
• Variability of Fe II Emission Features in the Seyfert 1 Galaxy NGC 5548
• Radio Loud AGN in the Context of the Eigenvector 1 Parameter Space
• The Largest Blueshifts of [O III] emission line in Two Narrow-Line Quasars
• Is There a Disc in the Superluminal Quasars?
• Variability of Optical \ion{Fe}{ii} Complex in Narrow-Line Seyfert 1 Galaxy NGC 4051
• A Close Separation Double Quasar Lensed by a Gas-Rich Galaxy
• Evidence for a Very Broad Line Region in PG 1138+222
• A Limit Relation between Black Hole Mass and H$\beta$ Width: Testing Super-Eddington Accretion in Active Galactic Nuclei

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• Techniques for Profile Binning and Analysis of Eigenvector Composite Spectra: Comparing Hbeta and MgII 2800 as Virial Estimators