Deep Hst Imaging of Sextans a I. the Spatially Resolved Recent Star Formation History

X iv :a st ro -p h/ 01 10 25 7v 1 1 0 O ct 2 00 1 Deep HST Imaging of Sextans A I. The Spatially Resolved Recent Star Formation History Robbie C. Dohm-Palmer Astronomy Department, University of Michigan, Ann Arbor, MI 48109 [email protected] Evan D. Skillman Astronomy Department, University of Minnesota, Minneapolis, MN 55455 [email protected] Mario Mateo Astronomy Department, University of Michigan, Ann Arbor, MI 48109 [email protected] Abi Saha and Andrew Dolphin National Optical Astronomy Observatories, 950 North Cherry Avenue, P.O. Box 26732, Tucson, AZ 85726 [email protected], [email protected] Eline Tolstoy U.K. Gemini Support Group, Oxford University, Oxford OX1 3Rh, England [email protected] Jay S. Gallagher Department of Astronomy, University of Wisconsin, Madison, WI 53706-1582 [email protected] and Andrew A. Cole Astronomy Dept., 532 LGRT, University of Massachusetts, Amherst, MA 01003 [email protected]