Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: VLT spectroscopy of blue supergiants in IC 1613   We present multi-object spectroscopy of young, massive stars in the Local
Group galaxy IC 1613. We provide the spectral classification and a detailed
spectral catalog for 54 OBA stars in this galaxy. The majority of the
photometrically selected sample is composed of B- and A-type supergiants. The
remaining stars include early O-type dwarfs and the only Wolf-Rayet star known
in this galaxy. Among the early B stars we have serendipitously uncovered 6 Be
stars, the largest spectroscopically confirmed sample of this class of objects
beyond the Magellanic Clouds. We measure chemical abundances for 9 early-B
supergiants, and find a mean oxygen abundance of 12+log(O/H)=7.90 +/- 0.08.
This value is consistent with the result we obtain for two HII regions in which
we detect the temperature-sensitive [OIII]4363 auroral line.

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The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
1
The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: hep-th