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Stellar Magnetism and starspots: the implications for exoplanets

Published online by Cambridge University Press:  07 August 2014

Conrad Vilela ,
John Southworth  and
Carlos del Burgo
Conrad Vilela*
Affiliation:
Astrophysics Group, Keele University, Keele, Staffordshire, ST5 5BG
John Southworth
Affiliation:
Astrophysics Group, Keele University, Keele, Staffordshire, ST5 5BG
Carlos del Burgo
Affiliation:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis Enrique Erro 1, Sta. Ma. Tonantzintla, Puebla, Mexico
*
*email: c.vilela@keele.ac.uk
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Abstract

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Stellar variability induced by starspots can hamper the detection of exoplanets and bias planet property estimations. These features can also be used to study star-planet interactions as well as inferring properties from the underlying stellar dynamo. However, typical techniques, such as ZDI, are not possible for most host-stars. We present a robust method based on spot modelling to map the surface of active star allowing us to statistically study the effects and interactions of stellar magnetism with transiting exoplanets. The method is applied to the active Kepler-9 star where we find small evidence for a possible interaction between planet and stellar magnetosphere which leads to a 2:1 resonance between spot rotation and orbital period.

Keywords

Stellar variabilitystellar activitystellar Magnetismmagnetic fieldsstarspotsrotationexoplanetstar-planet interaction
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 247 - 250
Copyright
Copyright © International Astronomical Union 2014 

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