The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 42 Issue 2
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- Pages.65.1-65.1
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- 2017
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- 1226-2692(pISSN)
High resolution spectroscopic study of the peculiar globular cluster M22 (NGC 6656)
- Kim, Hyeong-Jun (Department of Astronomy and Space Science, Sejong University) ;
- Lee, Jae-Woo (Department of Physics and Astronomy, Sejong University)
- Published : 2017.10.10
Abstract
We present the high-resolution spectroscopic study of the red-giant branch (RGB) stars in the peculiar globular cluster M22 (NGC 6656). We obtained high-resolution spectra of 55 RGB stars using the CTIO 4-m telescope and the HYDRA multi-object spectrograph. By employing an improved LTE analysis method, we measured accurate elemental abundances. In this talk, we will discuss the differences in the chemical composition between the two stellar populations in the context of the formation of M22.
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