A new catalog of homogenised absorption line indices for Milky Way globular clusters from high-resolution integrated spectroscopy

Kim, H.-S.; Cho, J.; Sharples, R.M.; Vazdekis, A.; Beasley, M.A.; Yoon, S.-J.

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 Å 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 lesssim [Fe/H] lesssim 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.

Citation

Kim, H., Cho, J., Sharples, R., Vazdekis, A., Beasley, M., & Yoon, S. (2016). A new catalog of homogenised absorption line indices for Milky Way globular clusters from high-resolution integrated spectroscopy. Astrophysical Journal Supplement, 227(2), Article 24. https://doi.org/10.3847/1538-4365/227/2/24

• Journal Article Type: Article
• Acceptance Date: Oct 20, 2016
• Online Publication Date: Dec 9, 2016
• Publication Date: Dec 9, 2016
• Deposit Date: Dec 4, 2016
• Publicly Available Date: Dec 7, 2016
• Journal: Astrophysical Journal Supplement
• Print ISSN: 0067-0049
• Electronic ISSN: 1538-4365
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 227
• Issue: 2
• Article Number: 24
• DOI: https://doi.org/10.3847/1538-4365/227/2/24
• Public URL: https://durham-repository.worktribe.com/output/1369873
• Related Public URLs: https://arxiv.org/abs/1610.08061