Stellar proper motions in the Galactic bulge with ACS/WFC on HST

Details Stellar proper motions in the Galactic bulge with ACS/WFC on HST Stellar proper motions in the Galactic bulge with ACS/WFC on HST

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..245..361c&link_type=abstract

Formation and Evolution of Galaxy Bulges, Proceedings of the International Astronomical Union, IAU Symposium, Volume 245, p. 361

Astronomy and Astrophysics

Astronomy

Stars: Kinematics, Galaxy: Bulge, Galaxy: Disk, Galaxy: Kinematics And Dynamics

Scientific paper

In 2004 the Sagittarius Window Eclipsing Extrasolar Planet Search (SWEEPS) project undertook a very deep ACS/WFC exposure-set of the Sgr-I low-reddening window in the Galactic Bulge, with repeat observations 2.04 years later. The combination of superb first-epoch sampling, wide field of view and high PSF stability of ACS/WFC on Hubble allows proper motions to be extracted for more than 137,000 objects, over 85,000 to accuracy better than 0.3 mas yr-1. We present these proper motions and outline some of the uses to which they have been put, including the separation of a pure-Bulge sample and the inner Galactic rotation curve.

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