Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Period and amplitude variations in post-common-envelope eclipsing
  binaries observed with SuperWASP   Period or amplitude variations in eclipsing binaries may reveal the presence
of additional massive bodies in the system, such as circumbinary planets. Here,
we have studied twelve previously-known eclipsing post-common-envelope binaries
for evidence of such light curve variations, on the basis of multi-year
observations in the SuperWASP archive. The results for HW Vir provided strong
evidence for period changes consistent with those measured by previous studies,
and help support a two-planet model for the system. ASAS J102322-3737.0
exhibited plausible evidence for a period increase not previously suggested;
while NY Vir, QS Vir and NSVS 14256825 afforded less significant support for
period change, providing some confirmation to earlier claims. In other cases,
period change was not convincingly observed; for AA Dor and NSVS 07826147,
previous findings of constant period were confirmed. This study allows us to
present hundreds of new primary eclipse timings for these systems, and further
demonstrates the value of wide-field high-cadence surveys like SuperWASP for
the investigation of variable stars.

14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
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The categories of this paper are: eess
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th