Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CRTS J035010.7+323230, a new eclipsing polar in the cataclysmic variable
  period gap   We report the discovery of a new eclipsing polar, CRTS J035010.7+323230
(hereafter CRTS J0350+3232). We identified this cataclysmic variable (CV)
candidate as a possible polar from its multi-year Catalina Real-Time Transient
Survey (CRTS) optical light curve. Photometric monitoring of 22 eclipses in
2015 and 2017 was performed with the 2.1-m Otto Struve Telescope at McDonald
Observatory. We derive an unambiguous high-precision ephemeris. Strong evidence
that CRTS J0350+3232 is a polar comes from optical spectroscopy obtained over a
complete orbital cycle using the Apache Point Observatory 3.5-m telescope. High
velocity Balmer and He II $\lambda$4686{\AA} emission line equivalent width
ratios, structures, and variations are typical of polars and are modulated at
the same period, 2.37-hrs (142.3-min), as the eclipse to within uncertainties.
The spectral energy distribution and luminosity is found to be comparable to
that of AM Herculis. Pre-eclipse dips in the light curve show evidence for
stream accretion. We derive the following tentative binary and stellar
parameters assuming a helium composition white dwarf and a companion mass of
0.2 M$_{\odot}$: inclination i = 74.68$^{o}$ ${\pm}$ 0.03$^{o}$, semi-major
axis a = 0.942 ${\pm}$ 0.024 R$_{\odot}$, and masses and radii of the white
dwarf and companion respectively: M$_{1}$ = 0.948 $^{+0.006}_{-0.012}$
M$_{\odot}$, R$_{1}$ = 0.00830 $^{+0.00012}_{-0.00006}$ R$_{\odot}$, R$_{2}$ =
0.249 ${\pm}$ 0.002 R$_{\odot}$. As a relatively bright (V $\sim$ 17-19 mag),
eclipsing, period-gap polar, CRTS J0350+3232 will remain an important
laboratory for the study of accretion and angular momentum evolution in polars.

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The categories of this paper are: hep-ph
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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: q-alg
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex