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Period and period change measurements for 143 SuperWASP eclipsing binary candidates near the short-period limit and discovery of a doubly eclipsing quadruple system

Lohr, M. E.; Norton, A. J.; Kolb, U. C.; Maxted, P. F. L.; Todd, I. and West, R. G. (2013). Period and period change measurements for 143 SuperWASP eclipsing binary candidates near the short-period limit and discovery of a doubly eclipsing quadruple system. Astronomy & Astrophysics, 549, article no. A86.

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DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1051/0004-6361/201220562
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Abstract

Building on previous work, a new search of the SuperWASP archive was carried out to identify eclipsing binary systems near the short-period limit. 143 candidate objects were detected with orbital periods between 16 000 and 20 000 s, of which 97 are new discoveries. Period changes significant at 1σ or more were detected in 74 of these objects, and in 38 the changes were significant at 3σ or more. The significant period changes observed followed an approximately normal distribution with a half-width at half-maximum of ~0.1 s yr-1. There was no apparent relationship between period length and magnitude or direction of period change. Amongst several interesting individual objects studied, 1SWASP J093010.78+533859.5 is presented as a new doubly eclipsing quadruple system, consisting of a contact binary with a 19 674.575 s period and an Algol-type binary with a 112 799.109 s period, separated by 66.1 AU, being the sixth known system of this type.

Item Type: Journal Article
Copyright Holders: 2012 ESO
ISSN: 1432-0746
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetThe Open University (OU)
Keywords: binaries: close; binaries: eclipsing; stars: variables: general
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
eSTEeM
Item ID: 35727
Depositing User: Andrew Norton
Date Deposited: 07 Dec 2012 15:42
Last Modified: 14 Oct 2014 19:29
URI: http://oro.open.ac.uk/id/eprint/35727
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