Black hole masses of weak emission line quasars based on continuum fit method

Abstract

We studied optical-ultraviolet spectral energy distribution of 10 weak emission-line quasars (WLQs) which lie at redshifts z = 0.19 and 1.43 < z < 3.48. The theoretical models of their accretion disk continua are created based on the Novikov-Thorne equations. It allows us to estimate masses of their supermassive black holes (MBH) and accretion rates. We determined the virial factor for WLQs and note its anti-correlation with the full width at half maximum (FWHM) of Hbeta emission-line (f propto FWHM^(alpha), alpha = (-1.34 +/- 0.37)). By comparison with the previously estimated BH masses, the underestimation of MBH is noticed with a mean factor 4-5 which depends on the measured full width. We proposed the new formula to estimate MBH in WLQs based on their observed FWHM (H beta) and luminosities at 5100 A. In our opinion, WLQs are also normal quasars visible in a reactivation stage.

arXiv comment13 pages, 15 figures, accepted for publication in the Astrophysical Journal

References in corpus (79)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• The Seventh Data Release of the Sloan Digital Sky Survey
• Correcting for the Effects of Interstellar Extinction
• 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
• A Catalog of Quasar Properties from SDSS DR7
• Determining Central Black Hole Masses in Distant Active Galaxies and Quasars. II. Improved Optical and UV Scaling Relationships
• Observational constraints on growth of massive black holes
• Spectral Energy Distributions of Hard X-ray selected AGNs in the XMDS Survey
• The Relationship Between Luminosity and Broad-Line Region Size in Active Galactic Nuclei
• Supermassive Black Holes in Active Galactic Nuclei. II. Calibration of the M-sigma Relationship for AGNs
• An Empirical Ultraviolet Template for Iron Emission in Quasars as Derived from I Zw 1
• Biases in Virial Black Hole Masses: An SDSS Perspective
• Self-Consistent Models of the AGN and Black Hole Populations: Duty Cycles, Accretion Rates, and the Mean Radiative Efficiency
• Systematic Effects in Measurement of Black Hole Masses by Emission-Line Reverberation of Active Galactic Nuclei: Eddington Ratio and Inclination
• The Lick AGN Monitoring Project: Broad-Line Region Radii and Black Hole Masses from Reverberation Mapping of Hbeta
• Revised Catalog of GALEX Ultraviolet Sources. I. The All-sky Survey: GUVcat_AIS
• The X-ray Properties of the Most-Luminous Quasars from the Sloan Digital Sky Survey
• Mass Functions of the Active Black Holes in Distant Quasars from the Large Bright Quasar Survey, the Bright Quasar Survey, and the Color-Selected Sample of the SDSS Fall Equatorial Stripe
• The diversity of quasars unified by accretion and orientation
• Reverberation Mapping Measurements of Black Hole Masses in Six Local Seyfert Galaxies
• Modeling reverberation mapping data II: dynamical modeling of the Lick AGN Monitoring Project 2008 dataset
• What controls the C IV line profile in active galactic nuclei?
• Black Hole Growth to z = 2 - I: Improved Virial Methods for Measuring M_BH and L/L_Edd
• Estimating Black Hole Masses in Active Galactic Nuclei Using the MgII 2800 Emission Line
• What broad emission lines tell us about how active galactic nuclei work
• Diverse Broad Line Region Kinematic Signatures From Reverberation Mapping
• X-ray Insights into the Nature of PHL 1811 Analogs and Weak Emission-Line Quasars: Unification with a Geometrically Thick Accretion Disk?
• High-Redshift SDSS Quasars with Weak Emission Lines
• Non-LTE Models and Theoretical Spectra of Accretion Disks in Active Galactic Nuclei. III. Integrated Spectra for Hydrogen-Helium Disks
• The Nature of X-ray Bright Optically Normal Galaxies
• Discovery of eight z ~ 6 quasars from Pan-STARRS1
• Super-Eddington accretion rates in Narrow Line Seyfert 1 galaxies
• Are the black hole masses in Narrow Line Seyfert 1 galaxies actually small?
• The Discovery of a High-redshift Quasar without Emission Lines from Sloan Digital Sky Survey Commissioning Data
• The effect of nuclear gas distribution on the mass determination of supermassive black holes
• The Intrinsically X-ray Weak Quasar PHL 1811. II. Optical and UV Spectra and Analysis
• The Intrinsically X-ray Weak Quasar PHL 1811. I. X-ray Observations and Spectral Energy Distribution
• Active galactic nuclei at z ~ 1.5: I. Spectral energy distribution and accretion discs
• SDSS quasars in the WISE preliminary data release and quasar candidate selection with optical/infrared colors
• Reverberation Mapping of Optical Emission Lines in Five Active Galaxies
• A Population of X-ray Weak Quasars: PHL 1811 Analogs at High Redshift
• Black Hole - Galaxy Scaling Relationships for Active Galactic Nuclei with Reverberation Masses
• Cold Accretion Disks and Lineless Quasars
• X-ray and Multiwavelength Insights into the Nature of Weak Emission-Line Quasars at Low Redshift
• Kinematics of the Broad Emission Line Region in NGC 5548
• Weak-Line Quasars at High Redshift: Extremely High Accretion Rates or Anemic Broad-Line Regions?
• Detection of Rest-frame Optical Lines from X-shooter Spectroscopy of Weak Emission Line Quasars
• Scaling relations between black holes and their host galaxies: comparing theoretical and observational measurements, and the impact of selection effects
• The Sloan Digital Sky Survey Reverberation Mapping Project: Low-Ionization Broad-Line Widths and Implications for Virial Black Hole Mass Estimation
• Connecting the X-ray properties of weak-line and typical quasars: testing for a geometrically thick accretion disk
• Constraints on the black hole spin in the quasar SDSS J094533.99+100950.1
• Mean and Extreme Radio Properties of Quasars and the Origin of Radio Emission
• SDSS J094533.99+100950.1 - the remarkable weak emission line quasar
• Mid-Infrared Spectroscopic Properties of Ultra-Luminous Infrared Quasars
• Dusty torus formation by anisotropic radiative pressure feedback of active galactic nuclei
• Probing the IGM/Galaxy Connection IV: The LCO/WFCCD Galaxy Survey of 20 Fields Surrounding UV Bright Quasars
• A Comprehensive Study of Broad Absorption Line Quasars: I. Prevalence of HeI* Absorption Line Multiplets in Low-Ionization Objects
• The Large Bright Quasar Survey VII. The LBQS and FIRST Surveys
• Consistency of the black hole mass determination in AGN from the reverberation and the X-ray excess variance method
• A large sample of Kohonen-selected SDSS quasars with weak emission lines: selection effects and statistical properties
• Test of the Formation mechanism of the Broad Line Region in Active Galactic Nuclei
• Is the Broad-Line Region Clumped or Smooth? Constraints from the H alpha Profile in NGC 4395, the Least Luminous Seyfert 1 Galaxy
• Masses, Accretion Rates and Inclinations of AGNs
• The Sloan Digital Sky Survey Reverberation Mapping Project: Improving Lag Detection with an Extended Multi-Year Baseline
• Interpretation of Departure from the Broad Line Region Scaling in Active Galactic Nuclei
• Steep Hard-X-ray Spectra Indicate Extremely High Accretion Rates in Weak Emission-Line Quasars
• Black-hole mass estimates for a homogeneous sample of bright flat-spectrum radio quasars
• The behavior of quasar C IV emission-line properties with orientation
• Reaching the Peak of the quasar spectral energy distribution - II. Exploring the accretion disc, dusty torus and host galaxy
• Unshifted Metastable He I* Mini-Broad Absorption Line System in the Narrow Line Type 1 Quasar SDSS J080248.18$+$551328.9
• A quasar hiding behind two dusty absorbers. Quantifying the selection bias of metal-rich, damped Lyman-alpha absorption systems
• The environment of weak emission-line quasars
• Vertical dissipation profiles and the photosphere location in thin and slim accretion disks
• Irradiation of accretion discs in active galactic nuclei due to warm absorber
• Reaching the Peak of the Quasar Spectral Energy Distribution I: Observations and Models
• Mg II line properties in lobe-dominated quasars

Cited by in corpus (7)

• Probing the Nature of High Redshift Weak Emission Line Quasars: A Young Quasar with a Starburst Host Galaxy
• SDSS J1058+5443: A blue quasar does not have optical/NUV broad emission lines
• Estimating black hole masses: Accretion disk fitting versus reverberation mapping and single epoch
• Outflows in the Gaseous Discs of Active Galaxies and their impact on Black Hole Scaling Relations
• Rarefied Broad-Line Regions in Active Galactic Nuclei: Anomalous Responses in Reverberation Mapping and Implications for Weak Emission-Line Quasars
• Deep absorption in SDSS J110511.15+530806.5
• The Unusual Weak-Line Quasar PG1407+265 and its Foreground z~0.7 X-ray Cluster