On the masses of black-holes in radio-loud quasars

Astronomy and Astrophysics – Astrophysics

Scientific paper

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5 pages, two figures are added, accepted by MNRAS Letters

Scientific paper

10.1046/j.1365-8711.2001.04795.x

The central black-hole masses of a sample of radio-loud quasars are estimated by using the data of $H_{\beta}$ line-width and the optical continuum luminosity. The vast majority of the quasars in this sample have black-hole masses larger than $10^{8} M_{\odot}$, while a few quasars may contain relatively smaller black-holes. We found a significant anti-correlation between the radio-loudness and the central black-hole mass. It might imply that the jet formation is governed by the black-hole mass.

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