Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: L-band (3.5 micron) IR-excess in massive star formation, I. 30 Doradus   L-band data of 30 Doradus at 3.5 micron taken with SPIREX (South Pole
Infrared Explorer) is presented. The photometry was combined with 2MASS JHK
data at 1.25-2.2 micron. Colour-colour and colour-magnitude diagrams are
constructed and used to determine the sources with infrared excess. These are
interpreted as circumstellar disks, and enable the fraction of sources with
disks (the cluster disk fraction or CDF) to be determined. We find that ~42% of
the sources detected at L-band in 30 Doradus have an IR-excess.

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The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom