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Paper: The Initial Mass Function and Star Formation History of the Galactic Bulge from HST*
Volume: 491, Fifty Years of Wide Field Studies in the Southern Hemisphere: Resolved Stellar Populations in the Galactic Bulge and the Magellanic Clouds
Page: 182
Authors: Gennaro, M.; Brown, T.; Anderson, J.; Avila, R.; VandenBerg, D.; Sahu, K.; Bond, H.; Casertano, S.; Ferguson, H.; Livio, M.; Minniti, D.; Panagia, N.; Renzini, A.; Tumlinson, J.; Valenti, E.; Valenti, J.; Zoccali, M.
Abstract: We present the latest results of the Hubble Galactic Bulge Treasury Program. The program has targeted 4 low-extinction windows in the Galactic bulge, down to ∼0.4M. Imaging was performed in 5 bands, from UV to near-IR, providing excellent coverage of the stellar spectral energy distributions and hence allowing the derivation of stellar masses, metallicities, ages, and extinctions. A second epoch in the I-band enables proper motion cleaning of foreground stars from the bulge catalogs. To best exploit this unique dataset, we have developed a hierarchical Bayesian technique that uses the information for individual stars to infer the properties of the whole population. This contribution contains the preliminary results on the initial mass function and star formation history in one of the 4 observed bulge fields.
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