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Orbital period changes and the higher-order multiplicity fraction amongst SuperWASP eclipsing binaries
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Lohr, M. E., Norton, A. J., Payne, S. G., West, Richard G. and Wheatley, Peter J. (2015) Orbital period changes and the higher-order multiplicity fraction amongst SuperWASP eclipsing binaries. Astronomy & Astrophysics, Volume 578 . Article Number A136. doi:10.1051/0004-6361/201525747
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Official URL: http://dx.doi.org/10.1051/0004-6361/201525747
Abstract
Orbital period changes of binary stars may be caused by the presence of a third massive body in the system. Here we have searched the archive of the Wide Angle Search for Planets (SuperWASP) project for evidence of period variations in 13 927 eclipsing binary candidates. Sinusoidal period changes, strongly suggestive of third bodies, were detected in 2% of cases; however, linear period changes were observed in a further 22% of systems. We argue on distributional grounds that the majority of these apparently linear changes are likely to reflect longer-term sinusoidal period variations caused by third bodies, and thus estimate a higher-order multiplicity fraction of 24% for SuperWASP binaries, in good agreement with other recent figures for the fraction of triple systems amongst binary stars in general.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||||||
| Divisions: | Faculty of Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Double stars , Eclipsing binaries | ||||||||
| Journal or Publication Title: | Astronomy & Astrophysics | ||||||||
| Publisher: | EDP Sciences | ||||||||
| ISSN: | 0004-6361 | ||||||||
| Official Date: | June 2015 | ||||||||
| Dates: |
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| Volume: | Volume 578 | ||||||||
| Article Number: | Article Number A136 | ||||||||
| DOI: | 10.1051/0004-6361/201525747 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Funder: | University of Warwick, University of Keele, Science and Technology Facilities Council (Great Britain) (STFC), Open University |
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