Computer Science
Scientific paper
Feb 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..161f&link_type=abstract
NOAO Proposal ID #2007A-0161
Computer Science
Scientific paper
We propose to use Milky Way evolved star candidates from the Two Micron All Sky Survey (2MASS) and the GLIMPSE Spitzer Legacy survey to investigate the structure and the dynamics of the Galactic bar. This sample allows, 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 is visible using our sample. Using the proposed sample of ~ 1000 stars, we will be able to trace the dynamics of the Galactic bar along its entire length and vertical extent. Because this sample allow us to see virtually the entire Milky Way, and because proper motions can be obtained by combining 2MASS with the USNO A2.0 catalog and in some areas the UCAC-2 and OGLE survey data, the dynamics of the bar can be explored with a large sample of tracers with 3-D velocities. As a result, we will be able to compute individual orbits for stars and measure correlations between kinematics and position which will give powerful insights into the history of our bar.
Benjamin Robert
Churchwell Edward
Frinchaboy Peter
Kunkel William
Majewski Steven
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