Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A photometric study of two neglected eclipsing binaries   We present the first BVR photometry, period variation, and photometric
light-curve analysis of two poorly studied eclipsing binaries V1321 Cyg and CR
Tau. Observations were carried out from November 2017 to January 2020 at the
observatory of Uzhhorod National University. Period variations were studied
using all available early published as well as our minima times. We have used
newly developed ELISa code for the light curve analysis and determination of
photometric parameters of both systems. We found that V1321 Cyg is a close
detached eclipsing system with a low photometric mass ratio of $q=0.28$ which
suggests that the binary is a post mass transfer system. No significant period
changes in this system are detected. CR Tau is, on the other hand, a
semi-detached system where the secondary component almost fills its Roche lobe.
We detected a long-term period increase at a rate of $1.49 \times 10^{-7} d/y$,
which support mass transfer from lower mass secondary component to the more
massive primary.

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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-th
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The categories of this paper are: math
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The categories of this paper are: ao-sci
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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: chao-dyn
10
The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: hep-ph