Abstract
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 ∼2.0 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 ≲ [Fe/H] ≲ 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.
Original language | English |
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Article number | 24 |
Journal | Astrophysical Journal, Supplement Series |
Volume | 227 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2016 Dec |
Bibliographical note
Publisher Copyright:© 2016. The American Astronomical Society. All rights reserved..
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science