Estimate black hole masses of AGNs using ultraviolet emission line properties

Abstract

Based on the measured sizes of broad line region of the reverberation-mapping AGN sample, two new empirical relations are introduced to estimate the central black hole masses of radio-loud high-redshift ($z>0.5$) AGNs. First, using the archival $IUE/HST$ spectroscopy data at UV band for the reverberation-mapping objects, we obtained two new empirical relations between the BLR size and \Mg/\C emission line luminosity. Secondly, using the newly determined black hole masses of the reverberation-mapping sample for calibration, two new relationships for determination of black hole mass with the full width of half maximum and the luminosity of \Mg/\C line are also found. We then apply the relations to estimate the black hole masses of AGNs in Large Bright Quasar Surveyq and a sample of radio-loud quasars. For the objects with small radio-loudness, the black hole mass estimated using the $R_{\rm BLR} - L_{\eMg/\eC}$ relation is consistent with that from the $R_{BLR}-L_{3000\mathring{A}/1350\mathring{A}}$ relation. But for radio-loud AGNs, the mass estimated from the $R_{BLR} - L_{\eMg/\eC}$ relation is systematically lower than that from the continuum luminosity $L_{3000\mathring{A}/1350\mathring{A}}$. Because jets could have significant contributions to the UV/optical continuum luminosity of radio-loud AGNs, we emphasized again that for radio-loud AGNs, the emission line luminosity may be a better tracer of the ionizing luminosity than the continuum luminosity, so that the relations between the BLR size and UV emission line luminosity should be used to estimate the black hole masses of high redshift radio-loud AGNs.

19 pages, 10 figures

References in corpus (39)

• 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 Survey of z>5.8 Quasars in the Sloan Digital Sky Survey I: Discovery of Three New Quasars and the Spatial Density of Luminous Quasars at z~6
• 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
• The cosmological evolution of quasar black-hole masses
• An Empirical Ultraviolet Template for Iron Emission in Quasars as Derived from I Zw 1
• Measuring the black hole masses of high redshift quasars
• Determining Central Black Hole Masses in Distant Active Galaxies
• Keplerian Motion of Broad-Line Region Gas as Evidence for Supermassive Black Holes in Active Galactic Nuclei
• Evidence for Supermassive Black Holes in Active Galactic Nuclei from Emission-Line Reverberation
• The black-hole masses of Seyfert galaxies and quasars
• On Black Hole Masses and Radio Loudness in AGN
• Optical Continuum and Emission-Line Variability of Seyfert 1 Galaxies
• A 3x10^9 solar mass black hole in the quasar SDSS J1148+5251 at z=6.41
• Jets and accretion processes in Active Galactic Nuclei: further clues
• What controls the C IV line profile in active galactic nuclei?
• Early Growth and Efficient Accretion of Massive Black Holes at High Redshift
• Black Hole Mass, Velocity Dispersion and the Radio Source in AGN
• Steps Toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XVI. A Thirteen-Year Study of Spectral Variability in NGC 5548
• Iron Emission in the z=6.4 Quasar SDSS J114816.64+525150.3
• Black Holes and Hosts of Active and Quiescent Galaxies: I. The Black Hole-Bulge Relation revisited
• The Mass of the Central Black Hole in the Seyfert Galaxy NGC 3783
• Black hole mass estimation with a relation between the BLR size and emission line luminosity of AGN
• Correlation between radio and broad-line emissions in radio-loud quasars
• ESO-VLT optical spectroscopy of BL Lac objects: I. new redshifts
• Emission Line Properties of the Large Bright Quasar Survey
• Black hole mass and accretion rate of active galactic nuclei with double-peaked broad emission lines
• Inclinations and black hole masses of Seyfert 1 galaxies
• HST Observations of the Optical Jets of PKS 0521-365, 3C371, and PKS 2201+044
• Determination of the Central Mass in Active Galactic Nuclei Using Cross-Correlation Lags and Velocity Dispersions
• Emission Line-Ultraviolet to X-Ray Continuum Correlations: Constraints on the Anisotropy of the Ionizing Continuum in Active Galactic Nuclei
• Monitoring of the optical and 2.5-11.7 micron spectrum and mid-IR imaging of the Seyfert 1 galaxy Mrk279 with ISO
• The Large Bright Quasar Survey VII. The LBQS and FIRST Surveys
• Emission-Line Properties of z > 4 Quasars
• On the Physical Conditions in AGN Optical Jets
• VLBA observations of z > 4 radio-loud quasars
• The HST survey of the B2 sample of radio galaxies: detection of two optical jets
• What ignites optical jets?

Cited by in corpus (35)

• Spectroscopy of Broad Line Blazars from 1LAC
• The black hole - bulge mass relation of Active Galactic Nuclei in the Extended Chandra Deep Field - South Survey
• Failed radiatively Accelerated Dusty Outflow model of the Broad Line Region in Active Galactic Nuclei. I. Analytical solution
• The black hole mass, Eddington ratio, and M_bh-σ_[O III] relation in young radio galaxies
• Constraints on the black hole spin in the quasar SDSS J094533.99+100950.1
• Towards equation of state of dark energy from quasar monitoring: Reverberation strategy
• SDSS J094533.99+100950.1 - the remarkable weak emission line quasar
• The optical variability of flat-spectrum radio quasars in the SDSS stripe 82 region
• Investigation on Young radio AGNs based on SDSS spectroscopy
• Black Hole Mass Estimates and Rapid Growth of Supermassive Black Holes in Luminous $z\sim$ 3.5 Quasars
• Flat-Spectrum Radio Quasars from SDSS DR3 Quasar Catalogue
• A ring accelerator? Unusual jet dynamics in the IceCube candidate PKS 1502+106
• Extreme Gaseous Outflows in Radio-Loud Narrow-Line Seyfert 1 Galaxies
• Calibrating Mg II-based black-hole mass estimators using Low-to-High-Luminosity Active Galactic Nuclei
• M_BH - sigma relation in SDSS flat-spectrum radio quasars
• Spectroscopy and polarimetry of the gravitationally lensed quasar SDSS J1004+4112 with the 6m SAO RAS telescope
• The Extreme Red Excess in Blazar Ultraviolet Broad Emission Lines
• SALT long-slit spectroscopy of LBQS 2113-4538: variability of the Mg II and Fe II component
• Constraints on the location of $\gamma$-ray emitting region for a sample of blazars with radio core-shift measurements
• A very bright i=16.44 quasar in the `redshift desert' discovered by LAMOST
• The optical variability of steep-spectrum radio quasars in the SDSS Stripe 82 region
• SALT long-slit spectroscopy of CTS C30.10: two-component Mg II line
• CO line width and the black hole -- bulge relationship at high redshift
• Line shifts and sub-pc super-massive binary black holes
• Shining Light on Merging Galaxies I: The Ongoing Merger of a Quasar with a `Green Valley' Galaxy
• SALT long-slit spectroscopy of HE 0435-4312: fast displacement in the Mg II emission line
• 3C 216: A Powerful FRII Seyfert 1 Galaxy
• Study of variability in long-term multiwavelength optical lightcurves of blazar AO 0235+164
• SDSS spectroscopy for blazars in the $Fermi$ LAT bright AGN sample
• Multi-frequency VLBA Polarimetry of the high-redshift GPS Quasar OQ172
• Discovery of six high-redshift quasars with the Lijiang 2.4m telescope and the Multiple Mirror Telescope
• Estimating black hole masses of blazars
• Multiband optical variability on diverse timescales of the blazar Ton 599 from 2011 to 2023
• An estimate of the gravitational-wave background from the observed cosmological distribution of quasars
• Discovering bright quasars at intermediate redshifts based on the optical/near-IR colors