C
Chul Chung
Researcher at Yonsei University
Publications - 94
Citations - 1565
Chul Chung is an academic researcher from Yonsei University. The author has contributed to research in topics: Globular cluster & Metallicity. The author has an hindex of 19, co-authored 91 publications receiving 1445 citations.
Papers
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Journal ArticleDOI
Super-Helium-rich Populations and the Origin of Extreme Horizontal-Branch Stars in Globular Clusters
Young-Wook Lee,Seok-Joo Joo,Sang-Il Han,Chul Chung,Chang H. Ree,Young-Jong Sohn,Yong-Cheol Kim,Suk-Jin Yoon,Sukyoung K. Yi,Pierre Demarque +9 more
TL;DR: In this paper, the same helium enhancement required for this special feature on the double main sequence can by itself reproduce the extreme horizontal-branch (HB) stars observed in ω Cen, which are hotter than normal HB stars.
Journal ArticleDOI
Super Helium-Rich Population and the Origin of Extreme Horizontal-Branch Stars in Globular Clusters
Young-Wook Lee,Seok-Joo Joo,Sang-Il Han,Chul Chung,Chang H. Ree,Young-Jong Sohn,Yong-Cheol Kim,Suk-Jin Yoon,Sukyoung K. Yi,Pierre Demarque +9 more
TL;DR: In this paper, the same helium enhancement required for the double main sequence (MS) can by itself reproduce the extreme horizontal-branch (HB) stars observed in Omega Cen, which are hotter than normal HB stars.
Journal ArticleDOI
Early-type Host Galaxies of Type Ia Supernovae. II. Evidence for Luminosity Evolution in Supernova Cosmology
TL;DR: In this article, the most direct and reliable estimates of population age and metallicity for these host galaxies were obtained from high-quality (signal-to-noise ratio ~175) spectra.
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Nonlinear color-metallicity relations of globular clusters. iii. on the discrepancy in metallicity between globular cluster systems and their parent elliptical galaxies
Suk-Jin Yoon,Sang-Yoon Lee,John P. Blakeslee,Eric W. Peng,Sangmo Tony Sohn,Jaeil Cho,Hak Sub Kim,Chul Chung,Sooyoung Kim,Young-Wook Lee +9 more
TL;DR: In this paper, the observed color distributions of Globular Clusters (GCs) and halo field stars are linked to their intrinsic metallicities, which suggest nonlinear color-to-metallicity conversions, which translate observed color distribution into unimodal MDFs with broad metal-poor tails.
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The Milky Way without X: An alternative interpretation of the double red clump in the Galactic bulge
TL;DR: In this paper, the presence of two red clumps (RCs) in high latitude fields of the Milky Way bulge is interpreted as evidence for an X-shaped structure originated from the bar instability.