Old stellar populations. 5: Absorption feature indices for the complete LICK/IDS sample of stars
Old stellar populations. 5: Absorption feature indices for the complete LICK/IDS sample of stars
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DOI：
10.1086/192087
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发表时间：
1994-10
影响因子：
8.7
通讯作者：
G. Worthey;S. Faber;J. González;D. Burstein
中科院分区：
文献类型：
--
作者：
G. Worthey;S. Faber;J. González;D. Burstein
在460颗恒星的样本中，自动测量了21个光学吸收特征，其中11个已经确定。根据Gorgas等人的研究，这些指数被归纳为拟合函数，给出指数强度作为恒星温度、重力和（Fe/H）的函数。该项目的目的是预测不同年龄和金属丰度恒星群综合光下的指数强度，但这些数据对银河系的恒星研究也有价值。有几个新的指数似乎是古老恒星族金属丰度的有希望的指标。索引数据和大气参数的完整清单以计算机可读的形式提供。
Twenty-one optical absorption features, 11 of which have been previously defined, are automatically measured in a sample of 460 stars. Following Gorgas et al., the indices are summarized in fitting functions that give index strengths as functions of stellar temperature, gravity, and (Fe/H). This project was carried out with the purpose of predicting index strengths in the integrated light of stellar populations of different ages and metallicities, but the data should be valuable for stellar studies in the Galaxy as well. Several of the new indices appear to be promising indicators of metallicity for old stellar populations. A complete list of index data and atmospheric parameters is available in computer-readable form.