2011/02/08 by Hwihyun Kim, Kim, Hwihyun, Bradley C. Whitmore +4
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Stellar, planetary, and galactic studies
paper · pdf · doi:10.48550/arxiv.1102.1742
openalex publication_date 2011/02/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a multi-wavelength photometric study of individual stars in M83\nbased on observations taken as part of the WFC3 Early Release Science (ERS)\nprogram. The central region of M83 has been imaged in seven broad-band filters\nto obtain multi-wavelength coverage from the near-UV to near-IR. We use four\nfilters- F336W, F438W, F555W, and F814W-to measure the UBVI photometric colors\nand intrinsic luminosity for ~10,000 stars. These measurements are used to\ndetermine the recent (< 1 Gyr) star formation history of M83. We selected 50\nregions in the spiral arm and the inter-arm area of M83 and categorize them\nbased on their H? morphology. To determine ages of stars in each region, the\ncolor-magnitude diagrams (CMD) and the color-color diagrams were used with the\nPadova isochrones with a metallicity of Z=0.03 (1.5 Z odot). We correct the\nforeground and internal extinction of individual stars using the reddening-free\nQ parameter and improve our age estimates of stars from the isochrone fitting\non the CMDs. Comparisons of stellar ages and cluster ages based on both their\nH? morphology and their spectral energy distribution (SED) fitting were made\nand show fairly good correlations. We also find that the regions with ages\ndetermined younger than 10 Myr are located preferentially along the active\nstar-forming regions on the spiral arm.\n