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Orbital period changes and the higher-order multiplicity fraction amongst SuperWASP eclipsing binaries

Lohr, M. E.; Norton, A. J.; Payne, S. G.; West, R. G. and Wheatley, P. J. (2015). Orbital period changes and the higher-order multiplicity fraction amongst SuperWASP eclipsing binaries. Astronomy & Astrophysics, 578, article no. A136.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1051/0004-6361/201525747
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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 Item
Copyright Holders: 2015 ESO
ISSN: 0004-6361
Project Funding Details:
Funded Project NameProject IDFunding Body
PhD studentshipNot SetSTFC/OU
Consolidated Grant project (post-doc with Simon Clark)Not SetSTFC
Keywords: stars; close binaries; eclipsing binaries; archival research; multiple star systems
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 43513
Depositing User: Marcus Lohr
Date Deposited: 23 Jun 2015 15:44
Last Modified: 03 Jun 2019 11:22
URI: http://oro.open.ac.uk/id/eprint/43513
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