Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extreme star formation in the Milky Way: Luminosity distributions of
  young stellar objects in W49A and W51   We have compared the star-formation properties of the W49A and W51 regions by
using far-infrared data from the Herschel infrared Galactic Plane Survey
(Hi-GAL) and 850-um observations from the James Clerk Maxwell Telescope (JCMT)
to obtain luminosities and masses, respectively, of associated compact sources.
The former are infrared luminosities from the catalogue of Elia et al. (2017),
while the latter are from the JCMT Plane survey source catalogue as well as
measurements from new data. The clump-mass distributions of the two regions are
found to be consistent with each other, as are the clump-formation efficiency
and star-formation efficiency analogues. However, the frequency distributions
of the luminosities of the young stellar objects are significantly different.
While the luminosity distribution in W51 is consistent with Galaxy-wide
samples, that of W49A is top-heavy. The differences are not dramatic, and are
concentrated in the central regions of W49A. However, they suggest that
physical conditions there, which are comparable in part to those in
extragalactic starbursts, are significantly affecting the star-formation
properties or evolution of the dense clumps in the region.

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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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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: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex