Stellar Magnetism and starspots: the implications for exoplanets

Vilela, Conrad; Southworth, John; del Burgo, Carlos

Abstract

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.

Citation

Vilela, C., Southworth, J., & del Burgo, C. Stellar Magnetism and starspots: the implications for exoplanets

• Presentation Conference Type: Conference Paper (published)
• Online Publication Date: Aug 7, 2014
• Publication Date: 2013-08
• Deposit Date: Jun 16, 2023
• Journal: Proceedings of the International Astronomical Union
• Print ISSN: 1743-9213
• Electronic ISSN: 1743-9221
• Publisher: Cambridge University Press
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: S302
• Pages: 247-250
• DOI: https://doi.org/10.1017/s1743921314002208
• Keywords: Astronomy and Astrophysics; Space and Planetary Science; Stellar variability; stellar activity; stellar Magnetism; magnetic fields; starspots; rotation; exoplanet; star-planet interaction
• Public URL: https://keele-repository.worktribe.com/output/471612
• Publisher URL: https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/article/stellar-magnetism-and-starspots-the-implications-for-exoplanets/E5A0CC9406491966552B8DB9299E3C23