NOAO >   Observing Info >   Approved Programs >   2007A-0272

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Proposal Information for 2007A-0272


PI: Carl Grillmair, Spitzer Science Center, carl@ipac.caltech.edu
Address: 1200 E. California Blvd, Pasadena, CA 91125, U.S.A.

CoI: Odysseas Dionatos, INAF - Osservatorio Astronomico di Roma
CoI: Douglas Geisler, Universidad de Concepcion
CoI: Kathryn Johnston, Wesleyan University
CoI: Steven Majewski, University of Virginia
CoI: Richard Patterson, University of Virginia
CoI: David Spergel, Princeton University
CoI: Scott Tremaine, Princeton University

Title: Fishing in Tidal Streams

Abstract: The primary goal of this program is to measure radial velocities and establish physical associations for individual stars in three recently discovered, long tidal streams. Measured radial velocities for the streams will enable much tighter constraints to be placed on the orbits of the streams and the shape of the potential in the nearby Galactic halo. The brightest confirmed stream stars will also become part of a high-priority target list for observation with the Space Interferometry Mission. SIM proper motion measurements of stars in these and other streams will enable us to tightly constrain the detailed, three- dimensional structure of the Galactic potential field from the Solar Circle out to 50 kpc.


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



NOAO >   Observing Info >   Approved Programs >   2007A-0272

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