Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Carbon Monoxide in type II supernovae   Infrared spectra of two type II supernovae 6 months after explosion are
presented. The spectra exhibit a strong similarity to the observations of SN
1987A and other type II SNe at comparable epochs. The continuum can be fitted
with a cool black body and the hydrogen lines have emissivities that are
approximately those of a Case B recombination spectrum. The data extend far
enough into the thermal region to detect emission by the first overtone of
carbon monoxide. The molecular emission is modeled and compared with that in
the spectra of SN 1987A. It is found that the flux in the CO first overtone is
comparable to that found in SN 1987A. We argue that Carbon Monoxide forms in
the ejecta of all type II SNe during the first year after explosion.

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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: econ
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The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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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: nucl-th
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The categories of this paper are: nlin