Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: LP133-373: A New Chromospherically Active Eclipsing dMe Binary with a
  Distant, Cool White Dwarf Companion   We report the discovery of the partially eclipsing binary LP 133-373. Nearly
identical eclipses along with observed photometric colors and spectroscopy
indicate that it is a pair of chromospherically active dM4 stars in a circular
1.6 d orbit. Light and velocity curve modeling to our differential photometry
and velocity data show that each star has a mass and radius of 0.340+/-0.014
M_sun and 0.33+/-0.02 R_sun. The binary is itself part of a common proper
motion pair with LP 133-374 a cool DC or possible DA white dwarf with a mass of
0.49-0.82 M_sun, which would make the system at least 3 Gyr old.

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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: econ
0
The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc