A NEW CATALOG OF HOMOGENIZED ABSORPTION LINE INDICES FOR MILKY WAY GLOBULAR CLUSTERS FROM HIGH-RESOLUTION INTEGRATED SPECTROSCOPY

作者：Kim Hak Sub; Cho Jaeil; Sharples Ray M; Vazdekis Alexandre; Beasley Michael A; Yoon Suk Jin^*

来源：Astrophysical Journal, The - Supplement Series, 2016, 227(2): 24.

DOI：10.3847/1538-4365/227/2/24

• catalogs
• globular clusters: general
• stars: abundances

We perform integrated spectroscopy of 24 Galactic globular clusters (GGCs). Spectra are observed from one core radius for each cluster with a high wavelength resolution of similar to 2.0 angstrom. FWHM. In combination with two existing data sets from Puzia et al. and Schiavon et al., we construct a large database of Lick spectral indices for a total of 53 GGCs with a wide range of metallicities, -2.4 less than or similar to [Fe/H] less than or similar to 0.1, and various horizontal-branch morphologies. The empirical index-to-metallicity conversion relationships are provided for the 20 Lick indices for the use of deriving metallicities for remote, unresolved stellar systems.

• 出版日期2016-12