Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectroscopy of the enigmatic short-period cataclysmic variable IR Com
  in an extended low state   We report the occurrence of a deep low state in the eclipsing short-period
cataclysmic variable IR Com, lasting more than two years. Spectroscopy obtained
in this state shows the system as a detached white dwarf plus low-mass
companion, indicating that accretion has practically ceased. The spectral type
of the companion derived from the SDSS spectrum is M6-7, somewhat later than
expected for the orbital period of IR Com. Its radial velocity amplitude,
K_2=419.6+-3.4 km/s, together with the inclination of 75-90deg implies
0.8Msun<Mwd<1.0Msun. We estimate the white dwarf temperature to be ~15000K, and
the absence of Zeeman splitting in the Balmer lines rules out magnetic fields
in excess of ~5 MG. IR Com still defies an unambiguous classification, in
particular the occurrence of a deep, long low state is so far unique among
short-period CVs that are not strongly magnetic.

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The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
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The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
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The categories of this paper are: alg-geom
16
The categories of this paper are: stat
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
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The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph