A NEW CATALOG of HOMOGENIZED ABSORPTION LINE INDICES for MILKY WAY GLOBULAR CLUSTERS from HIGH-RESOLUTION INTEGRATED SPECTROSCOPY

Hak Sub Kim, Jaeil Cho, Ray M. Sharples, Alexandre Vazdekis, Michael A. Beasley, Suk Jin Yoon

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

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 languageEnglish
Article number24
JournalAstrophysical Journal, Supplement Series
Volume227
Issue number2
DOIs
Publication statusPublished - 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

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