Differential rotation of stars with multiple transiting planets. Issue Volume 12:Issue S328(2016) (12th September 2017)

• Record Type: Journal Article
• Authors: Netto, Yuri; Valio, Adriana
• Editors: Nandy, D.; Valio, A.; Petit, P.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 12:Issue S328(2016)
• Page Start: 107
• Page End: 109
• Publication Date: 2017-09-12
• Subjects: stars: activity, -- planetary systems, -- spots; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921317004136
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: If a star hosts a planet in an orbit such that it eclipses the star periodically, can be estimated the rotation profile of this star. If planets in multiplanetary system occult different stellar areas, spots in more than one latitude of the stellar disc can be detected. The monitored study of theses starspots in different latitudes allow us to infer the rotation profile of the star. We use the model described in Silva (2003) to characterize the starspots of Kepler-210, an active star with two planets. Kepler-210 is a late K star with an estimated age of 350 ± 50 Myrs, average rotation period of 12.33 days, mass of 0.63 M⊙ and radius of 0.69 R⊙ . The planets that eclipses this star have radii of 0.0498 R s and 0.0635 R s with orbital periods of 2.4532 ± 0.0007 days and 7.9725 ± 0.0014 days, respectively, where R s is the star radius.