Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-Resolution Observations of Molecular Lines toward the Hot Core
  G28.20-0.04N   We present the results from arcsecond resolution observations of various line
transitions at 1.3 mm toward hypercompact HII region G28.20-0.04N. With the SMA
data, we have detected and mapped the transitions in the CH$_{3}$CN, CO,
$^{13}$CO, SO$_{2}$, OCS, and CH$_{3}$OH molecular lines as well as the radio
recombination line H30$\alpha$. The observations and analysis indicate a hot
core associated with G28.20-0.04N. The outflow and possible rotation are
detected in this region.

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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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The categories of this paper are: physics
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-th