The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 39 Issue 2
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- Pages.55.1-55.1
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- 2014
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- 1226-2692(pISSN)
Gemini/GMOS Observation of Extended Star Clusters in Dwarf Irregular Galaxy NGC 6822
- Hwang, Narae (Korea Astronomy and Space Science Institute) ;
- Park, Hong Soo (Korea Astronomy and Space Science Institute) ;
- Lee, Myung Gyoon (Seoul National University) ;
- Lim, Sungsoon (Seoul National University) ;
- Hodge, Paul W. (University of Washington) ;
- Kim, Sang Chul (Korea Astronomy and Space Science Institute) ;
- Miller, Bryan (Gemini Observatory) ;
- Weisz, Daniel (University of Washington)
- Published : 2014.10.13
Abstract
on the observation with the Gemini Multi-Object Spectrograph on the Gemini-South 8.1 m telescope. The radial velocities of four ESCs do not display any sign of systematic motion, unlike the intermediate age carbon stars in NGC 6822. The ages and metallicities derived using the Lick indices show that the ESCs are old (>=8 Gyr) and metal poor ([Fe/H] <= -1.5). NGC 6822 is found to have both metal poor (
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