NOAO >   Observing Info >   Approved Programs >   2011B-0405

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Proposal Information for 2011B-0405


PI: Douglas Richstone, Univ of Michigan, dor@umich.edu
Address: Astronomy Department, 500 Church St, Ann Arbor, MI 48109

CoI: Kayhan Gultekin, Univ of Michigan
CoI: Tod Lauer, NOAO/KPNO
CoI: Karl Gebhardt, Univ of Texas

Title: Probing the Envelope of the Black Hole Mass - Galaxy Dispersion Relation

Abstract: We request 2 nights of NIFS + AO time to measure black hole (BH) masses in 4 galaxies selected to provide a vital diagnostic of the distribution of BH mass about the mean Mbh-sigma relation. The galaxies are selected to have the best resolved BH ``spheres of influence" (SOI) predicted by their velocity dispersions. Combined with existing and other proposed measurements this sample will form a statistically complete sample of the best galaxies in the local universe to capture the full distribution of masses. There is concern that observational biases may mean the existing estensive work on BH masses only defines the upper envelope of the BH mass distribution. By focusing on galaxies with predicted large angular SOIs we allow for the greatest range of BH mass at any dispersion to be observed. The observed distribution thereby provides an immediate test of the envelope model.


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NOAO >   Observing Info >   Approved Programs >   2011B-0405

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