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Seismic signatures of magnetic activity in solar-type stars observed by Kepler

A. R. G. Santos, T. L. Campante, W. J. Chaplin, M. S. Cunha, M. N. Lund, R. Kiefer, D. Salabert, R. A. García, G. R. Davies, Y. Elsworth, R. Howe

Abstract
The properties of the acoustic modes are sensitive to magnetic activity. The unprecedented long-term Kepler photometry, thus, allows stellar magnetic cycles to be studied through asteroseismology. We search for signatures of magnetic cycles in the seismic data of Kepler solar-type stars. We find evidence for periodic variations in the acoustic properties of about half of the 87 analysed stars. In these proceedings, we highlight the results obtained for two such stars, namely KIC 8006161 and KIC 5184732.

Keywords
stars: oscillations, stars: activity, methods: data analysis

IAU Symposium S340 (Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles)
Dipankar Banerjee, Jie Jiang, Kanya Kusano, Sami Solanki

Cambridge University Press
Volume 13, Page 225
2018 November

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Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia