Measuring the black hole masses of high redshift quasars

Abstract

A new technique is presented for determining the black-hole masses of high-redshift quasars from optical spectroscopy. The new method utilizes the full-width half maximum (FWHM) of the low-ionization MgII emission line and the correlation between broad-line region (BLR) radius and continuum luminosity at 3000 Angstroms. Using archival UV spectra it is found that the correlation between BLR radius and 3000 Angstrom luminosity is tighter than the established correlation with 5100 Angstrom luminosity. Furthermore, it is found that the correlation between BLR radius and 3000 Ang luminosity is consistent with a relation of the form $R_{BLR}\propto lambda{L}_{lambda}^{0.5}$, as expected for a constant ionization parameter. Using a sample of objects with broad-line radii determined from reverberation mapping it is shown that the FWHM of MgII and H beta are consistent with following an exact one-to-one relation, as expected if both H beta and MgII are emitted at the same radius from the central ionizing source. The resulting virial black-hole mass estimator based on rest-frame UV observables is shown to reproduce black-hole mass measurements based on reverberation mapping to within a factor of 2.5 (1 sigma). Finally, the new UV black-hole mass estimator is shown to produce identical results to the established optical (H beta) estimator when applied to 128 intermediate-redshift (0.3<z<0.9) quasars drawn from the Large Bright Quasar Survey and the radio-selected Molonglo quasar sample. We therefore conclude that the new UV virial black-hole mass estimator can be reliably used to estimate the black-hole masses of quasars from z~0.25 through to the peak epoch of quasar activity at z~2.5 via optical spectroscopy alone.

Replaced to address comments of referee and Dan Maoz (astro-ph/0207295). Minor revision of R_{BLR}-Luminosity calibration. Results and conclusions unchanged. Accepted for publication by MNRAS

References in corpus (8)

• On the black hole - bulge mass relation in active and inactive galaxies
• Determining Central Black Hole Masses in Distant Active Galaxies
• Supermassive Black Holes in Active Galactic Nuclei. I. The Consistency of Black Hole Masses in Quiescent and Active Galaxies
• The radio-luminosity - black hole mass correlation for quasars from the FIRST Bright Quasar Survey, and a ``unification scheme'' for radio-loud and radio-quiet quasars
• Searching for the Physical Drivers of the Eigenvector 1 Correlation Space
• Systematic Errors in the Estimation of Black Hole Masses by Reverberation Mapping
• On The Linearity of The Black Hole - Bulge Mass Relation in Active and in Nearby Galaxies
• The Mass of the Central Black Hole in the Seyfert Galaxy NGC 3783

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• Indicators of Black Hole Mass and Eddington Accretion Ratio from QSO X-ray and UV Spectra
• Massive black holes and their galaxies
• The host galaxies of flat-spectrum quasars