1Center for Astrophysics, University of Science and Technology of China, Hefei 230026
2National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012
3CAS-Peking University Joint Beijing Astrophysics Center, Beijing 100871
New Age Indicators for Stellar Populations
KONG Xu1,2,3;CHENG Fu-Zhen1,2
1Center for Astrophysics, University of Science and Technology of China, Hefei 230026
2National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012
3CAS-Peking University Joint Beijing Astrophysics Center, Beijing 100871
Abstract： We apply the method of principal component analysis to a sample of simple stellar populations to select some age sensitive spectral indices. Besides the well-known age sensitive index Hβ, we also find some new age sensitive indices, G4300 and Fe4383, C24668, and Mgb. In addition, we find that these spectral indices sensitive to age depend on the metallicity of stellar population, Hβ and G4300 are more suitable to determine the age of low metallicity stellar population, while C24668 and Mgb are more suitable to the high metallicity stellar population.
(Statistical and correlative studies of properties (luminosity and mass functions; mass-to-light ratio; Tully-Fisher relation, etc.))
引用本文:
KONG Xu;;CHENG Fu-Zhen;. New Age Indicators for Stellar Populations[J]. 中国物理快报, 2000, 17(9): 700-702.
KONG Xu, , CHENG Fu-Zhen,. New Age Indicators for Stellar Populations. Chin. Phys. Lett., 2000, 17(9): 700-702.
2000, Vol. 17 
