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

Published online by Cambridge University Press:  27 November 2018

A. R. G. Santos Open the ORCID record for A. R. G. Santos [Opens in a new window] ,
T. L. Campante ,
W. J. Chaplin ,
M. S. Cunha ,
M. N. Lund ,
R. Kiefer ,
D. Salabert ,
R. A. García ,
G. R. Davies  and
Y. Elsworth
...Show all authors
A. R. G. Santos
Affiliation:
Space Science Institute, 4750 Walnut Street, Suite 205, Boulder CO 80301, USA Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, PT-4150-762 Porto, Portugal Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, PT-4169-007 Porto, Portugal School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
T. L. Campante
Affiliation:
Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, PT-4150-762 Porto, Portugal Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, PT-4169-007 Porto, Portugal School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
W. J. Chaplin
Affiliation:
School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
M. S. Cunha
Affiliation:
Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, PT-4150-762 Porto, Portugal Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, PT-4169-007 Porto, Portugal
M. N. Lund
Affiliation:
School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
R. Kiefer
Affiliation:
Kiepenheuer-Institut für Sonnenphysik, Schöneckstraße 6, 79104 Freiburg, Germany
D. Salabert
Affiliation:
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France Université Paris Diderot, AIM, Sorbonne Paris Cité, CEA, CNRS, F-91191 Gif-sur-Yvette, France
R. A. García
Affiliation:
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France Université Paris Diderot, AIM, Sorbonne Paris Cité, CEA, CNRS, F-91191 Gif-sur-Yvette, France
G. R. Davies
Affiliation:
School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
Y. Elsworth
Affiliation:
School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
R. Howe
Affiliation:
School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
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Abstract

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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: oscillationsstars: activitymethods: data analysis
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S340: Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles , February 2018 , pp. 225 - 228
Copyright
Copyright © International Astronomical Union 2018 

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