AffiliationUniv Arizona, Steward Observ
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PublisherIOP PUBLISHING LTD
CitationXue Ge et al 2019 AJ 157 148
Rights© 2019. The American Astronomical Society. All rights reserved.
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AbstractFor the sample from Ge et al. of 87 low-z Palomar-Green quasi-stellar objects (QSOs) and 130 high-z QSOs (0 < z < 5) with H beta-based single-epoch supermassive black hole masses, we perform a uniform decomposition of the C IV lambda 1549 broad-line profile. Based on the rest frame defined by the [O III] lambda 5007 narrow emission line, a medium-strong positive correlation is found between the C IV blueshift and the luminosity at 5100 angstrom or the Eddington ratio L-Bol/L-Edd. A medium-strong negative relationship is found between the C IV blueshift and C IV equivalent width. These results support the postulation where the radiation pressure may be the driver of C IV blueshift. There is a medium-strong correlation between the mass ratio of C IV-based to H beta-based M-BH and the C IV blueshift, which indicates that the bias for C IV-based M-BH is affected by the C IV profile.
VersionFinal published version
SponsorsNational Key Research and Development Program of China [2017YFA0402703]; National Science Foundations of China [11373024, 11233003, 11873032]