Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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BVR PHOTOMETRY OF SUPERGIANT STARS IN HOLMBERG II

  • Sohn Y.J. (Department of Astronomy, Yonsei University) ;
  • Chang S.W. (Department of Astronomy, Yonsei University) ;
  • Kim D.Y. (Department of Astronomy, Yonsei University) ;
  • Kim J.W. (Department of Astronomy, Yonsei University) ;
  • Kim S.H. (Department of Astronomy, Yonsei University) ;
  • Lee J.E. (Department of Astronomy, Yonsei University) ;
  • Lee J.G. (Department of Astronomy, Yonsei University) ;
  • Lee J.M. (Department of Astronomy, Yonsei University) ;
  • Lee M.Y. (Department of Astronomy, Yonsei University) ;
  • Lee S.Y. (Department of Astronomy, Yonsei University) ;
  • Lee U.S. (Department of Astronomy, Yonsei University) ;
  • Park B.K. (Department of Astronomy, Yonsei University) ;
  • Park H.E. (Department of Astronomy, Yonsei University)
  • Published : 2006.03.01
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Abstract

We report the photometric properties in BVR bands for the resolved bright supergiant stars in the dwarf galaxy Holmberg II. The color-magnitude diagrams and color-color diagram of 374 resolved stars indicate that the majority of the member stars are supergiant stars with a wide range of spectral type between B-K. A comparison with theoretical evolutionary tracks indicates that the supergiant stars in the observed field have progenitor masses between ${\sim}10M_{\bigodot}\;and\;20M_{\bigodot}$. The exponent of luminosity function in V is in good agreement with those of the Small and Large Magellanic Clouds.

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