The Star Formation History and Initial Mass Function in the Galactic Bulge from HST
by
Mario Gennaro(Space Telescope Science Institute - USA)
→
Europe/Rome
248 (Building C, First Floor)
248
Building C, First Floor
Description
I will present the latest results from the Hubble Galactic Bulge
Treasury Program. The program has targeted 4 different low-extinction
windows in the Galactic Bulge, down to 0.4 solar masses. 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, I have developed
an advanced hierarchical Bayesian technique that uses the information
for individual stars to infer the properties of the whole population.
I will show the preliminary results on the initial mass function and
star-formation history in these 4 bulge fields.