Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5162
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dc.contributor.authorTran, K.-
dc.contributor.authorLevine, A.-
dc.contributor.authorRappaport, S.-
dc.contributor.authorBorkovits, T.-
dc.contributor.authorCsizmadia, Sz.-
dc.contributor.authorKalomeni, Belinda-
dc.date.accessioned2017-03-28T12:29:18Z
dc.date.available2017-03-28T12:29:18Z
dc.date.issued2013-09
dc.identifier.citationTran, K., Levine, A., Rappaport, S., Borkovits, T., Csizmadia, S.,and Kalomeni, B. (2013). The anticorrelated nature of the primary and secondary eclipse timing variations for the kepler contact binaries. Astrophysical Journal, 774(1). doi:10.1088/0004-637X/774/1/81en_US
dc.identifier.issn0004-637X
dc.identifier.issn0004-637X-
dc.identifier.urihttps:doi.org/10.1088/0004-637X/774/1/81
dc.identifier.urihttp://hdl.handle.net/11147/5162
dc.description.abstractWe report a study of the eclipse timing variations in contact binary systems, using long-cadence lightcurves from the Kepler archive. As a first step, observed minus calculated (O-C) curves were produced for both the primary and secondary eclipses of some 2000 Kepler binaries. We find ∼390 short-period binaries with O-C curves that exhibit (1) random walk-like variations or quasi-periodicities, with typical amplitudes of ±200-300 s, and (2) anticorrelations between the primary and secondary eclipse timing variations. We present a detailed analysis and results for 32 of these binaries with orbital periods in the range of 0.35 ± 0.05 days. The anticorrelations observed in their O-C curves cannot be explained by a model involving mass transfer, which, among other things, requires implausibly high rates of ∼0.01 MȮ yr-1. We show that the anticorrelated behavior, the amplitude of the O-C delays, and the overall random walk-like behavior can be explained by the presence of a starspot that is continuously visible around the orbit and slowly changes its longitude on timescales of weeks to months. The quasi-periods of ∼50-200 days observed in the O-C curves suggest values for k, the coefficient of the latitude dependence of the stellar differential rotation, of ∼0.003-0.013.en_US
dc.description.sponsorshipTUBITAK (112T776); City of Szombathely (S-11-1027)en_US
dc.language.isoenen_US
dc.publisherIOP Publishing Ltd.en_US
dc.relation.ispartofAstrophysical Journalen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectStarsen_US
dc.subjectBinariesen_US
dc.subjectEclipsingen_US
dc.subjectKepler archiveen_US
dc.titleThe Anticorrelated Nature of the Primary and Secondary Eclipse Timing Variations for the Kepler Contact Binariesen_US
dc.typeArticleen_US
dc.authoridTR17457en_US
dc.institutionauthorKalomeni, Belinda-
dc.departmentİzmir Institute of Technology. Physicsen_US
dc.identifier.volume774en_US
dc.identifier.issue1en_US
dc.identifier.wosWOS:000323426700081en_US
dc.identifier.scopus2-s2.0-84883091928en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1088/0004-637X/774/1/81-
dc.relation.doi10.1088/0004-637X/774/1/81en_US
dc.coverage.doi10.1088/0004-637X/774/1/81en_US
dc.identifier.wosqualityQ1-
dc.identifier.scopusqualityQ1-
item.fulltextWith Fulltext-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.grantfulltextopen-
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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