NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-21 T17:52:51 PDT
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For refcode 2002MNRAS.331..795M:
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Copyright by Royal Astronomical Society. 2002MNRAS.331..795M On the black hole-bulge mass relation in active and inactive galaxies R. J. McLure and J. S. Dunlop ABSTRACT New black hole mass estimates are presented for a sample of 72 active galactic nuclei (AGNs) covering three decades in optical luminosity. Using a subsample of Seyfert galaxies, which have black hole mass estimates from both reverberation mapping and stellar velocity dispersions, we investigate the geometry of the AGNs broad-line region. It is demonstrated that a model in which the orbits of the line-emitting material have a flattened geometry is favoured over randomly-orientated orbits. Using this model we investigate the M_bh_-L_bulge_ relation for a combined 90-object sample consisting of the AGNs plus a sample of 18 nearby inactive elliptical galaxies with dynamical black hole mass measurements. It is found that, for all reasonable mass-to-light ratios, the M_bh_-L_bulge_ relation is equivalent to a linear scaling between bulge and black hole mass. The best-fitting normalization of the M_bh_-M_bulge_ relation is found to be M_bh_ = 0.0012M_bulge_, in agreement with recent black hole mass studies based on stellar velocity dispersions. Furthermore, the scatter around the M_bh_-L_bulge_ relation for the full sample is found to be significantly smaller than has been previously reported ({DELTA}log M_bh_ = 0.39 dex). Finally, using the nearby inactive elliptical galaxy sample alone, it is shown that the scatter in the M_bh_-L_bulge_ relation is only 0.33 dex, comparable with that of the M_bh_-{sigma} relation. These results indicate that reliable black hole mass estimates can be obtained for high redshift galaxies. Keywords: galaxies: active - galaxies: bulges - galaxies: nuclei - quasars: general.
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