Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Eclipsing Binary System WN3(h)+O5V BAT99-129: Analysis of the MACHO
  Light Curve and the Parameters of the Components   BAT99-129 is a massive eclipsing binary system in the Large Magellanic Cloud
(LMC) which consists of WN3(h) and O5V components. A broad-band MACHO light
curve of the system is studied in the present paper. A dense and extended
atmosphere of the Wolf-Rayet (WR) star does not allow one to analyze the light
curve in terms of standard parametric models of Wilson-Devinney type.
Distributions of brightness and absorption across the WR star disk are restored
using direct solution of integral equations describing eclipses in the system.
  As a result, reliable estimates of the orbital inclination and component
parameters have been obtained. The orbital inclination is 78 deg, the orbital
separation is 28.5 solar radii, the radius of the O component is 7.1 solar
radii. The size of the WR component core opaque in optical continuum is 3.4
solar radii. The brightness temperature in the center of the WR disk is about
45000K. Probable errors of the parameters are discussed. Evolutionary status of
the system is discussed.

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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: cs
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The categories of this paper are: math
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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-th
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The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci