NOAO >   Observing Info >   Approved Programs >   2010A-0269

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Proposal Information for 2010A-0269


PI: Dave Hanes, Queen's University, hanes@astro.queensu.ca
Address: Department of Physics, Astronomy Research Group, Kingston, Ontario, K7L 3N6, Canada

CoI: Ainsley Campbell, Queen's University
CoI: Karl Gebhardt, University of Texas at Austin
CoI: Duncan Forbes, Swinburne University of Technology
CoI: Terry Bridges, Queen's University
CoI: Juan Forte, Facultad de Cs. Astronomicas y Geofisica, UNLP
CoI: Favio Faifer, Facultad de Cs. Astronomicas y Geofisica, UNLP
CoI: Ray Sharples, University of Durham
CoI: Mark Norris, University of North Carolina
CoI: Steve Zepf, Michigan State University

Title: Dynamical Modelling of the Dark Halo, Black Hole, and Orbital Structure in NGC4649

Abstract: NGC4649 is one of the best galaxies to compare dynamical models as derived from stars, globular clusters, planetary nebulae and X-ray gas. We propose to obtain kinematics of 150 globular clusters beyond a few effective radii. The datasets for NGC4649 are excellent for dynamical studies, with high spatial-resolution kinematics of the central regions and high signal-to-noise X-ray data. For galaxies like NGC4649, the measured black hole mass can be biased downwards by about a factor 2-3x when a dark halo is not included in the models. There is also a concern that the X-ray data may not adequately trace the gravitational potential. Thus, the proposed dataset will offer unique and important checks for determination of black hole mass, dark halo, X-ray properties, and orbital structure.


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NOAO >   Observing Info >   Approved Programs >   2010A-0269

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