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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.

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


Authors

H.-S. Kim

J. Cho

A. Vazdekis

M.A. Beasley

S.-J. Yoon



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 Mar 28, 2024
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
Related Public URLs https://arxiv.org/abs/1610.08061

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Accepted Journal Article (3.2 Mb)
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Copyright Statement
© 2016. The American Astronomical Society. All rights reserved.






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