CALIBRATING C-IV-BASED BLACK HOLE MASS ESTIMATORS

We present the single-epoch black hole mass estimators based on the CIV [lambda]1549 broad emission line, using the updated sample of the reverberation-mapped active galactic nuclei and high-quality UV spectra. By performing multi-component spectral fitting analysis, we measure the CIV line widths (...

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Bibliographic Details
Published in:The Astrophysical journal 2013-06, Vol.770 (2), p.1-12
Main Authors: PARK, DAESEONG, Woo, Jong-Hak, Denney, Kelly D, Shin, Jaejin
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BLACK HOLES
Black holes (astronomy)
Calibration
COMPARATIVE EVALUATIONS
Dispersions
Emission
Estimators
GALAXIES
GALAXY NUCLEI
LINE WIDTHS
LUMINOSITY
MASS
RED SHIFT
SKY
Spectral emissivity
Spectral lines
Texts
ULTRAVIOLET SPECTRA
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Summary:We present the single-epoch black hole mass estimators based on the CIV [lambda]1549 broad emission line, using the updated sample of the reverberation-mapped active galactic nuclei and high-quality UV spectra. By performing multi-component spectral fitting analysis, we measure the CIV line widths (FWHM sub(CIV) and line dispersion, [sigma] sub(CIV)) and the continuum luminosity at 1350 [Angstrom] (L sub(1350)) to calibrate the C-IV-based mass estimators. By comparing with the H[beta] reverberation-based masses, we provide new mass estimators with the best-fit relationships, i.e., M sub(BH) [is proportional to] (ProQuest: Formulae and/or non-USASCII text omitted) and M sub(BH) [is proportional to] (ProQuest: Formulae and/or non-USASCII text omitted). The new C-IV-based mass estimators show significant mass-dependent systematic difference compared to the estimators commonly used in the literature. Using the published Sloan Digital Sky Survey QSO catalog, we show that the black hole mass of high-redshift QSOs decreases on average by ~0.25 dex if our recipe is adopted.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/770/2/87