3 papers
astro-ph.GA2026
How Robust is the Cosmic Distance with Tip of Red Giant Branch against Stellar Population Variations?
Chul Chung, Young-Wook Lee, Suk-Jin Yoon +10
The tip of the red giant branch (TRGB) provides a key standard candle for extragalactic distance measurements and for refining the Hubble constant. We test its robustness by quanti…
astro-ph.GA2024
Comparison of chemical compositions between the bright and faint red clumps for the metal-poor and metal-rich populations in the Milky Way bulge
Seungsoo Hong, Dongwook Lim, Young-Wook Lee
We examined the double red clump (RC) observed in the Galactic bulge, interpreted as a difference in distance ("X-shaped bulge scenario") or in chemical composition ("multiple popu…
astro-ph.GA2024
Two stellar populations with different metallicities in the low-mass globular cluster Gran 5
Dongwook Lim, Sang-Hyun Chun, Young-Wook Lee +3
Context. With the increasing number of discoveries of globular clusters in the inner Milky Way, the need for spectroscopic confirmation and further investigation of their stellar p…