The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 39 Issue 2
- /
- Pages.47.1-47.1
- /
- 2014
- /
- 1226-2692(pISSN)
Does the linear conversion between calcium infrared triplet and metallicity of simple stellar populations hold in the whole range of metallicity?
- Chung, Chul (Department of Astronomy & Center for Galaxy Evolution Research, Yonsei University) ;
- Yoon, Suk-Jin (Department of Astronomy & Center for Galaxy Evolution Research, Yonsei University) ;
- Lee, Sang-Yoon (Department of Astronomy & Center for Galaxy Evolution Research, Yonsei University) ;
- Lee, Young-Wook (Department of Astronomy & Center for Galaxy Evolution Research, Yonsei University)
- Published : 2014.10.13
Abstract
The calcium infrared triplet (CaT) is one of the prominent absorption features in the infrared wavelength regime. Recently, this absorption feature has been getting attention in the prediction of metallicity of stellar populations because of its strong sensitivity to the calcium abundance and metallicity of a star. However, we find that measuring metallicity directly from CaT is very dangerous because the formation mechanism of CaT is very inefficient in the cool stars which are abundant in metal-rich populations. This characteristics of CaT make the CaT-metallicity relation to converge around ~
Keywords