http://arxiv.org/abs/1910.06175
We study observed optical-ultraviolet spectral energy distribution of 10 weak emission-line quasars (WLQs) which lie at redshifts z = 0.19 and 1.43 < z < 3.48. The theoretical models of their accretion disc continua are created based on the Novikov-Thorne equations. It allows us to estimate masses of their supermassive black holes (MBH) and accretion rates. We determine the virial factor for WLQs and note its anti-correlation with the full width at half maximum (FWHM) of H beta emission-line (f propto FWHM^(alpha), alpha = (-1.99 +/- 0.67). By comparison with the estimated previously BH masses, the underestimation of MBH is noticed with a mean factor 7.4 dependent on the measured full width. We propose the new formula to estimate MBH in WLQs based on their observed FWHM (H beta) and luminosities at 5100 A. In our opinion, WLQs are also normal quasars visible in a reactivation stage.
M. Marculewicz and M. Nikolajuk
Tue, 15 Oct 19
67/90
Comments: 11 pages, 13 figures, submitted to ApJ
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