Lohr, ME and Norton, AJ and Anderson, DR and Cameron, AC and Faedi, F and Haswell, CA and Hellier, C and Hodgkin, ST and Horne, K and Kolb, UC and Maxted, PFL and Pollacco, D and Skillen, I and Smalley, B and West, RG and Wheatley, PJ (2014) Period and amplitude variations in post-common-envelope eclipsing binaries observed with SuperWASP. ASTRONOMY & ASTROPHYSICS, 566 (A128). ISSN 0004-6361

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Abstract

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.

Item Type: Article
Additional Information: Reproduced with permission from Astronomy & Astrophysics, © ESO
Uncontrolled Keywords: stars: variables: general / binaries: close / binaries: eclipsing
Subjects: Q Science > QB Astronomy
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Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
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Depositing User: Symplectic
Date Deposited: 13 Jul 2016 15:14
Last Modified: 13 Jul 2016 15:14
URI: http://eprints.keele.ac.uk/id/eprint/2017

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