Photospheric activity, rotation, and star-planet interaction of the planet-hosting star CoRoT-6

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dc.contributor.authorLanza A.F.
dc.contributor.authorBonomo A.S.
dc.contributor.authorPagano I.
dc.contributor.authorLeto G.
dc.contributor.authorMessina S.
dc.contributor.authorCutispoto G.
dc.contributor.authorMoutou C.
dc.contributor.authorAigrain S.
dc.contributor.authorAlonso R.
dc.contributor.authorBarge P.
dc.contributor.authorDeleuil M.
dc.contributor.authorFridlund M.
dc.contributor.authorSilva-Valio A.
dc.contributor.authorAuvergne M.
dc.contributor.authorBaglin A.
dc.contributor.authorCollier Cameron A.
dc.date.accessioned2024-03-13T01:30:37Z
dc.date.available2024-03-13T01:30:37Z
dc.date.issued2010
dc.description.abstractContext. The CoRoT satellite has recently discovered a hot Jupiter that transits across the disc of a F9 main-sequence star called CoRoT-6 with a period of 8.886 days. Aims. We model the photospheric activity of the star and use the maps of the active regions to study stellar differential rotation and the star-planet interaction. Methods. We apply a maximum entropy spot model to fit the optical modulation as observed by CoRoT during a uninterrupted interval of ~ 140 days. Photospheric active regions are assumed to consist of spots and faculae in a fixed proportion with solar-like contrasts. Results. Individual active regions have lifetimes up to 30-40 days. Most of them form and decay within five active longitudes whose different migration rates are attributed to the stellar differential rotation for which a lower limit of ΔΩ/Ω = 0.12 ± 0.02 is obtained. Several active regions show a maximum of activity at a longitude lagging the subplanetary point by ~ 200° with the probability of a chance occurrence being smaller than 1 percent. Conclusions. Our spot modelling indicates that the photospheric activity of CoRoT-6 could be partially modulated by some kind of star-planet magnetic interaction, while an interaction related to tides is highly unlikely because of the weakness of the tidal force. © 2010 ESO.
dc.description.issuenumber1
dc.description.volume525
dc.identifier.doi10.1051/0004-6361/201015245
dc.identifier.issn0004-6361
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/37134
dc.relation.ispartofAstronomy and Astrophysics
dc.rightsAcesso Aberto
dc.subject.otherlanguageplanetary systems
dc.subject.otherlanguagestars: activity
dc.subject.otherlanguagestars: individual: CoRoT-6
dc.subject.otherlanguagestars: late-type
dc.subject.otherlanguagestars: magnetic field
dc.subject.otherlanguagestars: rotation
dc.titlePhotospheric activity, rotation, and star-planet interaction of the planet-hosting star CoRoT-6
dc.typeArtigo
local.scopus.citations10
local.scopus.eid2-s2.0-78649584589
local.scopus.subjectPlanetary system
local.scopus.subjectstars: activity
local.scopus.subjectstars: individual: CoRoT-6
local.scopus.subjectstars: late-type
local.scopus.subjectstars: magnetic field
local.scopus.subjectstars: rotation
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=78649584589&origin=inward
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