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Date and Time of the Query: 2019-06-17 T02:40:00 PDT
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For refcode 2000ApJ...544L..91N:
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2000ApJ...544L..91N Black Hole Mass, Velocity Dispersion, and the Radio Source in Active Galactic Nuclei Charles H. Nelson Physics Department, University of Nevada, Las Vegas, Box 4002, 4505 Maryland Parkway, Las Vegas, NV 89154; cnelson@physics.unlv.edu Received 2000 July 5; accepted 2000 September 26; published 2000 November 16 ABSTRACT The recent discovery by Gebhardt et al. and Ferrarese & Merritt of a correlation between nuclear black hole mass M_bh_ and stellar velocity dispersion {sigma}_*_ in elliptical galaxies and spiral bulges has raised the question whether such a relationship exists for active galactic nuclei (AGNs). Estimates of M_bh_ for many AGNs, made using reverberation mapping techniques, allow exploration of the relationship between black hole mass, the host galaxy, and the energetics of nuclear emission. However, since only a few AGNs have both M_bh_ and {sigma}_*_ measurements, we use the [O III] {lambda}5007 emission-line widths on the assumption that for most AGNs the forbidden line kinematics are dominated by virial motion in the host galaxy bulge. We find that a relation does exist between M_bh_ and the [O III] line width for AGNs, which is similar to the one found by Gebhardt et al., although with more scatter, as expected if secondary influences on the gas kinematics are also present. Our conclusion is that both active and inactive galaxies follow the same relationship between black hole mass and bulge gravitational potential. We find no compelling evidence for systematic differences in the mass estimates from reverberation mapping and stellar dynamics. We also find that for radio-quiet AGNs, the radio power and black hole mass are highly correlated, linking emission on scales of kiloparsecs with the nuclear energy source. Subject headings: galaxies: kinematics and dynamics-galaxies: nuclei- galaxies: Seyfert-quasars: general
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