Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new catalog of homogenised absorption line indices for Milky Way
  globular clusters from high-resolution integrated spectroscopy   We perform integrated spectroscopy of 24 Galactic globular clusters. Spectra
are observed from one core radius for each cluster with a high wavelength
resolution of ~2.0 A FWHM. In combination with two existing data sets from
Puzia et al. (2002) and Schiavon et al. (2005), we construct a large database
of Lick spectral indices for a total of 53 Galactic globular clusters 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.

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The categories of this paper are: supr-con
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The categories of this paper are: econ
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: q-bio
1
The categories of this paper are: cs
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph