The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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On the Multiple Stellar Populations in the Globular Cluster NGC 6388

  • Roh, Dong-Goo (Center for Galaxy Evolution Research and Dept. of Astronomy, Yonsei Univ.) ;
  • Lee, Young-Wook (Center for Galaxy Evolution Research and Dept. of Astronomy, Yonsei Univ.) ;
  • Lim, Dongwook (Center for Galaxy Evolution Research and Dept. of Astronomy, Yonsei Univ.) ;
  • Han, Sang-Il (Center for Galaxy Evolution Research and Dept. of Astronomy, Yonsei Univ.)
  • Published : 2013.10.08
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Abstract

Unlike the conventional wisdom, observations made during the past decade have revealed that many globular clusters possess more than one stellar population. Here, we have discovered evidence for multiple red giant branches (RGBs) in the globular cluster NGC 6388 from the narrow-band Calcium and Str$\ddot{o}$mgren b & y (Caby) photometry. In order to confirm the difference in Calcium abundance, we have acquired the low resolution spectroscopy for these RGB stars. In this paper, we will present results of our photometry and hand in the preliminary results of spectroscopic observations.

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