Physical Sciences and Mathematics Commons^™

The Resolved Stellar Population In 50 Regions Of M83 From Hst/Wfc3 Early Release Science Observations, Hwihyun Kim, Bradley C. Whitmore, Rupali Chandar, Abhijit Saha, Catherine C. Kaleida, Max Mutchler, Seth H. Cohen, Daniela Calzetti, Robert W. O'Connel, Rogier A. Windhorst, Bruce Balick, Howard E. Bond, C. Marcella Carollo, Michael J. Disney, Michael A. Dopita, Jay A. Frogel, Donald N. B. Hall, Jon A. Holtzman, Randy A. Kimble, Patrick J. Mccarthy, Francesco Paresce, Joe I. Silk, John T. Trauger, Alistair R. Walker, Erick T. Young

Daniela Calzetti

We present a multi-wavelength photometric study of ~15,000 resolved stars in the nearby spiral galaxy M83 (NGC5236, D=4.61Mpc) based on Hubble Space Telescope Wide Field Camera 3 observations using four filters: F336W, F438W, F555W, and F814W. We select 50 regions (an average size of 260 pc by 280 pc) in the spiral arm and inter-arm areas of M83, and determine the age distribution of the luminous stellar populations in each region. This is accomplished by correcting for extinction towards each individual star by comparing its colors with predictions from stellar isochrones. We compare the resulting luminosity weighted mean ages of …