NOAO >   Observing Info >   Approved Programs >   2010A-0260

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Proposal Information for 2010A-0260


PI: Jacqueline Faherty, SUNY Stony Brook/AMNH, jfaherty@amnh.org
Address: Astronomy Department, 79th Street and Central Park West, New York, NY 10023, USA

CoI: Adam Burgasser, UCSD
CoI: Nicole van der Bliek, CTIO
CoI: Kelle Cruz, Hunter College
CoI: Frederick Vrba, USNO Flagstaff
CoI: Sarah Schmidt, University of Washington
CoI: Michael Shara, American Museum of Natural History
CoI: Andrew West, Boston University
CoI: John Bochanski, MIT

Title: The Brown Dwarf Kinematics Project: Parallaxes for Southern Low Luminosity Brown Dwarfs

Abstract: The distances and kinematics of brown dwarfs provide key statistical constraints on their ages, moving group membership, absolute brightnesses, evolutionary trends, and multiplicity. Yet fundamental measurements of parallax, proper motion and radial velocity have been made for only a relatively small fraction of the known brown dwarf population. To address this deficiency, we have initiated the \bf Brown Dwarf Kinematics Project which aims to measure and compile the 6D positions and velocities of all known brown dwarfs within 20 pc of the Sun and select sources of scientific interest. As part of this overarching project, we propose a one semester continuation of our approved long-term astrometric program using CTIO 4m + ISPI to measure the distances and proper motions of 51 low luminosity brown dwarfs in the Southern hemisphere. By focusing on the latest-type brown dwarfs, in particular sources spanning the poorly-understood L dwarf/T dwarf transition, this program will provide fundamental measurements for testing atmospheric and evolutionary models, and will allow us to better define the luminosity/effective temperature scale for the lowest luminosity brown dwarfs now known.


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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