High-level magnetic activity nature of the eclipsing binary KIC 12418816

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dc.contributor.authorDal H.A.
dc.contributor.authorÖzdarcan O.
dc.date.accessioned2019-10-26T21:15:12Z
dc.date.available2019-10-26T21:15:12Z
dc.date.issued2018
dc.departmentEge Üniversitesien_US
dc.description.abstractWe present comprehensive spectroscopic and photometric analysis of the detached eclipsing binary KIC 12418816, which is composed of two very similar and young main-sequence stars of spectral type K0 on a circular orbit. Combining spectroscopic and photometric modelling, we find masses and radii of the components of 0.88 ± 0.06 M? and 0.85 ± 0.02 R? for the primary and 0.84 ± 0.05 M? and 0.84 ± 0.02 R? for the secondary. Both components exhibit narrow emission features superposed on the cores of the Ca II H and K lines, while H? and Hß photospheric absoprtion is more completely infilled by broader emission. Very high precision Kepler photometry reveals remarkable sinusoidal light variation at out-ofeclipse phases, indicating strong spot activity, presumably on the surface of the secondary component. Spots on the secondary component appear to migrate towards decreasing orbital phase with a migration period of 0.72 ± 0.05 yr. Besides the sinusoidal variation, we detect 81 flares and find that both components possess flare activity. Our analysis shows that 25 flares out of 81 exhibit very high energies together with lower frequency, while the rest of them are very frequent but with lower energies. © 2017 The Authors.en_US
dc.identifier.doi10.1093/mnras/stx2875
dc.identifier.endpage338en_US
dc.identifier.issn0035-8711
dc.identifier.issn0035-8711en_US
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage326en_US
dc.identifier.urihttps://doi.org/10.1093/mnras/stx2875
dc.identifier.urihttps://hdl.handle.net/11454/15973
dc.identifier.volume474en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBinaries: eclipsingen_US
dc.subjectStars: activityen_US
dc.subjectStars: flareen_US
dc.subjectStars: fundamental parametersen_US
dc.subjectStars: individual: KIC 12418816en_US
dc.titleHigh-level magnetic activity nature of the eclipsing binary KIC 12418816en_US
dc.typeArticleen_US

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