천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제42권2호
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- Pages.43.2-43.2
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- 2017
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- 1226-2692(pISSN)
Discovery of a significant population of CN-enhanced red clump stars in the Milky Way bulge: Implications for the formation of early-type galaxies
- Lee, Young-Wook (Yonsei University) ;
- Hong, Seungsoo (Yonsei University) ;
- Lim, Dongwook (Yonsei University)
- 발행 : 2017.10.10
초록
We report our discovery of a significant population of CN-enhanced red clump stars in the classical bulge component of the Milky Way. Since CN-rich stars trace a population with enhanced Helium, Nitrogen, and Sodium originated in globular clusters (GCs), this is a direct evidence that proto-GCs were the major building blocks in the formation of the classical bulges and early-type galaxies in the hierarchical merging paradigm.
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