Differential rotation on the young solar analogue V889 Herculis

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dc.contributor.authorKovári Z.
dc.contributor.authorFrasca A.
dc.contributor.authorBiazzo K.
dc.contributor.authorVida K.
dc.contributor.authorMarilli E.
dc.contributor.authorÇakirli Ö.
dc.date.accessioned2019-10-26T22:33:30Z
dc.date.available2019-10-26T22:33:30Z
dc.date.issued2010
dc.departmentEge Üniversitesien_US
dc.description.abstractV889Herculis is one of the brightest single early-G type stars, a young Sun, that is rotating fast enough (Prot = 1.337 days) for mapping its surface by Doppler Imaging. The 10 FOCES spectra collected between 13-16 Aug 2006 at Calar Alto Observatory allowed us to reconstruct one single Doppler image for two mapping lines. The Fe i-6411 and Ca i-6439 maps, in a good agreement, revealed an asymmetric polar cap and several weaker features at lower latitudes. Applying the sheared-image method with our Doppler reconstruction we perform an investigation to detect surface differential rotation (DR). The resulting DR parameter, ??/? ? 0.009 of solar type, is compared to previous studies which reported either much stronger shear or comparably weak DR, or just preferred rigid rotation. Theoretical aspects are also considered and discussed. © International Astronomical Union 2011.en_US
dc.description.sponsorshipMinistero dell’Istruzione, dell’Università e della Ricerca, MIUR Hungarian Scientific Research Fund: K-68626 K-81421 Regione Siciliana Ministero dell’Istruzione, dell’Università e della Ricerca, MIURen_US
dc.description.sponsorshipZsK and KV are supported by the Hungarian Science Research Program (OTKA) grants K-68626 K-81421 and by the Lendület Young Researchers’ Program of the Hungarian Academy of Sciences. This work has been supported by the Italian Ministero dell’Istruzione, Università e Ricerca (MIUR) and by the Regione Sicilia. --en_US
dc.identifier.doi10.1017/S1743921311015110
dc.identifier.endpage125en_US
dc.identifier.isbn9780521760621
dc.identifier.issn1743-9213
dc.identifier.issn1743-9213en_US
dc.identifier.issueS273en_US
dc.identifier.scopusqualityQ4en_US
dc.identifier.startpage121en_US
dc.identifier.urihttps://doi.org/10.1017/S1743921311015110
dc.identifier.urihttps://hdl.handle.net/11454/19784
dc.identifier.volume6en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.relation.ispartofProceedings of the International Astronomical Unionen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectStars: activityen_US
dc.subjectStars: imagingen_US
dc.subjectStars: individual (V889Her)en_US
dc.subjectStars: latetypeen_US
dc.subjectStars: spotsen_US
dc.titleDifferential rotation on the young solar analogue V889 Herculisen_US
dc.typeConference Objecten_US

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