NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-25 T04:45:00 PDT
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For refcode 2003MNRAS.340..793W:
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NED Abstract

Copyright by Royal Astronomical Society. 2003MNRAS.340..793W The size of the broad-line regions in dwarf active galaxies Wang, Ting-Gui; Zhang, Xue-Guang Abstract. Using the empirical relation between black hole mass and bulge velocity dispersion established for active and quiescent galaxies, we derive the sizes of the broad-line regions (BLRs) for 22 dwarf active galaxies. These sizes are compared with those of Seyfert 1 galaxies and quasars. We find that the size of the BLRs of Seyfert 1s and quasars is well scaled with the luminosity of the H{alpha} line with a slope of ~=0.5, and dwarf active galaxies show larger BLRs than the values predicted by the BLR size-luminosity relation for Seyfert 1 galaxies and quasi-stellar objects (QSOs). The results suggest that the BLRs of dwarf active galactic nuclei (AGN) have lower ionization or/and lower density than those of Seyfert 1 galaxies and QSOs. Photoionization calculations show that the large BLRs are consistent with observed emission line spectra. Keywords: black hole physics, galaxies: active, galaxies: dwarf, galaxies: kinematics and dynamics
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