Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: HIDES spectroscopy of bright detached eclipsing binaries from the
  $Kepler$ field - II. Double- and triple-lined objects   We present the results of our spectroscopic observations of eight detached
eclipsing binaries (DEBs), selected from the $Kepler$ Eclipsing Binary Catalog.
Radial velocities (RVs) were calculated from high resolution spectra obtained
with the HIDES pectrograph, attached to the 1.88-m telescope of the Okayama
Astrophysical Observatory, and were used to characterize the targets in
combination with the $Kepler$ light curves. For each binary we obtained a full
set of orbital and physical parameters, reaching precision below 3% in masses
and radii for 5 pairs. By comparing our results with theoretical models, we
assess the distance, age and evolutionary status of the researched objects. We
also study eclipse timing variations of selected objects, and identify a new
system with a $\gamma$Dor pulsator. Two systems are triples, and show lines
coming from three components. In one case the motion of the outer star and the
perturbation in the RVs of the inner binary are clearly visible and periodical,
which allows us to directly calculate the mass of the third star, and
inclination of the outer orbit. In the second case we only see a clear motion
of the tertiary, and investigate two scenarios: that it is a linear trend
coming from the orbital motion around the inner binary, and that it is caused
by a planetary mass companion. When possible, we also compare our results with
the literature, and conclude that only by combining photometry with RVs it is
possible to obtain correct physical parameters of both components of a DEB.

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The categories of this paper are: hep-ph
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: cond-mat
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: alg-geom