The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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HST Study of ESO 149-G003, a nearby dwarf irregular galaxy

  • Pak, Mina (Korea University of Science and Technology (UST)) ;
  • Kim, Sang Chul (Korea University of Science and Technology (UST)) ;
  • Yang, Soung-Chul (Korea Astronomy and Space Science Institute (KASI)) ;
  • Kyeong, Jaemann (Korea Astronomy and Space Science Institute (KASI)) ;
  • Raj, Ashish (Korea Astronomy and Space Science Institute (KASI))
  • Published : 2014.10.13
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Abstract

We study the resolved stellar populations of ESO149-G003, a nearby dwarf irregular galaxy in the vicinity of the Sculptor group. We present F606W-F814W vs. F814W colour-magnitude diagrams (CMDs) obtained from HST/ACS archival data. We analyze the stellar content of ESO149-G003, as well as the spatial distribution of stars selected from stellar isochrone fitting analysis. Distance measurement using the tip of the red giant branch method, age measurement of various populations seen in the CMD, and isochrone fitting result will be shown and discussed.

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