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2016ApJ...825..126D - Astrophys. J., 825, 126-126 (2016/July-2)

Supermassive black holes with high accretion rates in active galactic nuclei. V. A new size-luminosity scaling relation for the broad-line region.

DU P., LU K.-X., ZHANG Z.-X., HUANG Y.-K., WANG K., HU C., QIU J., LI Y.-R., FAN X.-L., FANG X.-E., BAI J.-M., BIAN W.-H., YUAN Y.-F., HO L.C. and WANG J.-M.

Abstract (from CDS):

This paper reports results of the third-year campaign of monitoring super-Eddington accreting massive black holes (SEAMBHs) in active galactic nuclei (AGNs) between 2014 and 2015. Ten new targets were selected from the quasar sample of the Sloan Digital Sky Survey (SDSS), which have generally been more luminous than the SEAMBH candidates in the last two years. Hβ lags ( τHβ ) in five of the 10 quasars have been successfully measured in this monitoring season. We find that the lags are generally shorter, by large factors, than those of objects with same optical luminosity, in light of the well-known RHβ-L5100 relation. The five quasars have dimensionless accretion rates of {dot}M  =10 -103. Combining these with measurements of the previous SEAMBHs, we find that the reduction of Hβ lags depends tightly on accretion rates, τ_{Hβ}/τ_{R-L}∝{dot}M^{-0.42} , where τ_{R-L} is the Hβ lag from the normal RHβ-L5100 relation. Fitting 63 mapped AGNs, we present a new scaling relation for the broad-line region: {R}_{Hβ}=α_{1}{ℓ}_{44}^{β_{1}} min [1,{({dot}M/{dot}M_c)}^{-γ_{1}}] , where {ℓ}{44}=L{5100}/{10}{44} erg {s}{-1} is the 5100 Å continuum luminosity, and the coefficients are α1=29.6-2.8^+2.7 lt-day, β{1}={0.56}{-0.03}^{+0.03} , γ1=0.52-0.16^+0.33 , and {dot}Mc={11.19}{-6.22}^{+2.29} . This relation is applicable to AGNs over a wide range of accretion rates, from 10–3 to 103. Implications of this new relation are briefly discussed.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): accretion, accretion disks - galaxies: active - galaxies: nuclei

VizieR on-line data: <Available at CDS (J/ApJ/825/126): table1.dat table2.dat table3.dat table4.dat table5.dat>

Simbad objects: 24

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