Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Visual Orbit of iota Pegasi   We have determined the visual orbit for the spectroscopic binary iota~Pegasi
with interferometric visibility data obtained by the Palomar Testbed
Interferometer in 1997. iota~Pegasi is a double-lined binary system whose
minimum masses and spectral typing suggests the possibility of eclipses. Our
orbital and component diameter determinations do not favor the eclipse
hypothesis: the limb-to-limb separation of the two components is 0.151 +/-
0.069 mas at conjunction. Our conclusion that the iota~Peg system does not
eclipse is supported by high-precision photometric observations.
  The physical parameters implied by our visual orbit and the spectroscopic
orbit of Fekel and Tomkin (1983) are in good agreement with those inferred by
other means. In particular, the orbital parallax of the system is determined to
be 86.9 +/- 1.0 mas, and masses of the two components are determined to be
1.326 +/- 0.016 M_sun and 0.819 +/- 0.009 M_sun respectively.

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The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio
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The categories of this paper are: physics
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ph