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Period and amplitude variations in post-common-envelope eclipsing binaries observed with SuperWASP

Lohr, M. E,; Norton, A. J.; Anderson, D. R.; Collier Cameron, A.; Faedi, F.; Haswell, C. A.; Hellier, C.; Hodgkin, S. T.; Horne, K.; Kolb, U. C.; Maxted, P. F. L.; Pollacco, D.; Skillen, I.; Smalley, B.; West, R. G. and Wheatley, P. J. (2014). Period and amplitude variations in post-common-envelope eclipsing binaries observed with SuperWASP. Astronomy & Astrophysics, 566, article no. A128.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1051/0004-6361/201424027
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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: Journal Item
Copyright Holders: 2014 ESO
ISSN: 1432-0746
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetSTFC (Science & Technology Facilities Council)
Not SetNot SetOpen University
Keywords: stars-variables-general; binaries-close; binaries-eclipsing
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 40457
Depositing User: Andrew Norton
Date Deposited: 01 Jul 2014 10:41
Last Modified: 07 Dec 2018 22:08
URI: http://oro.open.ac.uk/id/eprint/40457
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