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Differential rotation of stars with multiple transiting planets

Published online by Cambridge University Press:  12 September 2017

Yuri Netto  and
Adriana Valio
Yuri Netto
Affiliation:
Center for Radio Astronomy and Astrophysics (CRAAM) Mackenzie Presbyterian University, Sao Paulo, Brazil email: [email protected]
Adriana Valio
Affiliation:
Center for Radio Astronomy and Astrophysics (CRAAM) Mackenzie Presbyterian University, Sao Paulo, Brazil email: [email protected]
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Abstract

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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 Rs and 0.0635 Rs with orbital periods of 2.4532 ± 0.0007 days and 7.9725 ± 0.0014 days, respectively, where Rs is the star radius.

Keywords

stars: activityplanetary systemsspots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S328: Living Around Active Stars , October 2016 , pp. 107 - 109
Copyright
Copyright © International Astronomical Union 2017 

References

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