NOAO >   Observing Info >   Approved Programs >   2003B-0376

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Proposal Information for 2003B-0376


PI: William E. Kunkel, Las Campanas Observatory, kunkel@jeito.lco.cl
Address: Carnegie Institution of Washington, Casilla 601, La Serena, Chile

CoI: Peter M. Frinchaboy, University of Virginia
CoI: Michael F. Skrutskie, University of Virginia
CoI: Steven R. Majewski, University of Virginia

Title: Mapping the Dynamics of the Milky Way from 2MASS: Carbon Stars in the Galactic Disk and the Bar

Abstract: We propose to use Milky Way carbon star candidates from the Two Micron All Sky Survey (2MASS) to investigate the structure and the dynamics of the Galactic bar and disk. This will allow, for the first time, investigation of bar kinematics along the entire length, not in just preferred directions. A standard candle analysis shows that the complete stellar bar and the far edge of the Galactic disk are visible using our sample. Not only will we look at the extent and dynamics of the Galactic bar, but we will search for evidence of the influence of the bar on the carbon stars in the other Milky Way disk. Second, because this sample of carbon stars allow us to see virtually the entire Milky Way, and because proper motions can be obtained by combining 2MASS with the USNO A2.0 catalogue, the dynamics of the outer disk can be explored with a large sample of disk tracers with 3-D velocities. A rotation curve for the outer Milky Way can be derived from this work.


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