Starspots properties and stellar activity from planetary transits

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dc.contributor.authorValio A.
dc.date.accessioned2024-03-13T00:54:31Z
dc.date.available2024-03-13T00:54:31Z
dc.date.issued2016
dc.description.abstractCopyright © 2017 International Astronomical Union.Magnetic activity of stars manifests itself in the form of dark spots on the stellar surface. This in turn will cause variations of a few percent in the star light curve as it rotates. When an orbiting planet eclipses its host a star, it may cross in front of one of these spots. In this case, a bump will be detected in the transit lightcurve. By fitting these spot signatures with a model, it is possible to determine the spots physical properties such as size, temperature, location, magnetic field, and lifetime. Moreover, the monitoring of the spots longitude provides estimates of the stellar rotation and differential rotation. For long time series of transits during multiple years, magnetic cycles can also be determined. This model has been applied successfully to CoRoT-2, CoRoT-4, CoRot-5, CoRoT-6, CoRoT-8, CoRoT-18, Kepler-17, and Kepler-63.
dc.description.firstpage69
dc.description.lastpage76
dc.description.volume12
dc.identifier.doi10.1017/S1743921317004094
dc.identifier.issn1743-9221
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/36046
dc.relation.ispartofProceedings of the International Astronomical Union
dc.rightsAcesso Aberto
dc.subject.otherlanguageStars: activity
dc.subject.otherlanguagestars: rotation stars: spots
dc.titleStarspots properties and stellar activity from planetary transits
dc.typeArtigo de evento
local.scopus.citations0
local.scopus.eid2-s2.0-85030120672
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85030120672&origin=inward
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