Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The orbit and stellar masses of the archetype colliding-wind binary WR
  140   We present updated orbital elements for the Wolf-Rayet (WR) binary WR\,140
(HD\,193793; WC7pd + O5.5fc). The new orbital elements were derived using
previously published measurements along with {\color{black}160} new radial
velocity measurements across the 2016 periastron passage of WR 140.
Additionally, four new measurements of the orbital astrometry were collected
with the CHARA Array. With these measurements, we derive stellar masses of
$M_{\rm WR} = 10.31\pm0.45 M_\odot$ and $M_{\rm O} = 29.27\pm1.14 M_{\odot}$.
We also include a discussion of the evolutionary history of this system from
the Binary Population and Spectral Synthesis (BPASS) model grid to show that
this WR star likely formed primarily through mass loss in the stellar winds,
with only a moderate amount of mass lost or transferred through binary
interactions.

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The categories of this paper are: hep-ex
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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: quant-ph
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The categories of this paper are: funct-an
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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: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th