Population Study of Resolved Stars in M83 using HST/WFC3 Early Release Science Data

Details Population Study of Resolved Stars in M83 using HST/WFC3 Early Release Science Data Population Study of Resolved Stars in M83 using HST/WFC3 Early Release Science Data

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21546331k&link_type=abstract

American Astronomical Society, AAS Meeting #215, #463.31; Bulletin of the American Astronomical Society, Vol. 36, p.1115

Astronomy and Astrophysics

Astronomy

Scientific paper

We present PSF photometry of individual stars in M83 based on observations taken as part of the WFC3 Early Release Science (ERS). The central region of M83 has been imaged in seven broad-band filters to obtain multi-wavelength coverage from the ultra-violet to near-infrared. We use four filters---F336W, F438W, F555W, and F814W---to measure the effective temperature and intrinsic luminosity for 10,000 stars. These measurements are used to determine the recent (< 1 Gyr) star formation history of M83. We select 29 regions and categorize them using their H-alpha morphology. To determine ages of stars in each region, we use color-magnitude diagram and two-color diagram and compare to ages determined by the cluster age-dating from the H-alpha morphology and from SED fitting. This project is based on Early Release Science observations made by the WFC3 Scientific Oversight Committee. We are grateful to the Director of the Space Telescope Science Institute for awarding Director's Discretionary time for this program. Support for program #11360 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

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