2 papers
astro-ph2007
The New Standard Stellar Population Models (NSSPM) -- The Prologue
Hyun-chul Lee, Guy Worthey, Scott C. Trager +7
We are developing a brand new stellar population models with flexible chemistry (isochrones plus stellar colors and spectra) in order to set a new standard of completeness and exce…
astro-ph1999
Horizontal-Branch Stars as an Age Indicator
Young-Wook Lee, Suk-Jin Yoon, Hyun-chul Lee +1
Surface temperature distribution of horizontal-branch (HB) stars is very sensitive to age in old stellar systems, which makes it an attractive age indicator. In this paper, we pres…