NOAO >   Observing Info >   Approved Programs >   2001B-0096

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Proposal Information for 2001B-0096


PI: Charles Nelson, UNLV, cnelson@physics.unlv.edu
Address: UNLV, Box 4002, 4505 Maryland Pkwy., Las Vegas, NV 89154-4002, USA

CoI: Gary Bower, NOAO
CoI: Richard Green, NOAO
CoI: Donna Weistrop, UNLV
CoI: Karl Gebhardt, UT

Title: The Relationship Between Bulge Velocity Dispersion and Black Hole Mass in AGN

Abstract: Reverberation mapping techniques have been successfully applied to the broad line regions (BLR) of three dozen AGN and quasars providing measurements of the central black hole mass (\Mbh). These measurements depend on the hypothesis that the BLR gas dynamics are dominated by gravity, consistent with the detection of the Keplerian decline in velocity with radius in the three best studied cases (NGC 5548, NGC 7469, & 3C 390.3, Peterson & Wandel 2000). It is important to verify the black hole masses determined by this technique. If verified, it could then be used to measure the evolution of \Mbh over cosmic time and determine \Mbh in both radio-quiet and radio-loud AGN spanning a huge range in luminosity. The recent discovery of a correlation between \Mbh and the bulge stellar velocity dispersion, \sig, in normal galaxies (Gebhardt et al. 2000a; Ferrarese & Merritt 2000) suggests a straightforward (although indirect) method for calibrating these reverberation mapping \Mbh measurements. First indications from the only seven active galaxies with reverberation mapping \Mbh and \sig estimates suggests that the AGNs follow the same relation as that for inactive nearby bulges. The primary goal is to accurately determine the \Mbh - \sig relation for AGN by measuring \sig in the remaining Seyfert 1 galaxies that have been reverberation-mapped. In this proposal we request continuation of a project granted time in the spring to complete our sample by including targets the fall R.A. range.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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