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Investigating magnetic activity of F stars with the Kepler mission

Published online by Cambridge University Press:  07 August 2014

S. Mathur ,
R. A. García ,
J. Ballot ,
T. Ceillier ,
D. Salabert ,
T. S. Metcalfe ,
C. Régulo ,
A. Jiménez  and
S. Bloemen
S. Mathur
Affiliation:
Space Science Institute, Boulder, CO, USA, email: smathur@spacescience.org
R. A. García
Affiliation:
Laboratoire AIM, CEA Saclay, Gif-sur-Yvette, France
J. Ballot
Affiliation:
Institut de Recherche en Astrophysique et Planétologie, Toulouse, France
T. Ceillier
Affiliation:
Space Science Institute, Boulder, CO, USA, email: smathur@spacescience.org
D. Salabert
Affiliation:
Laboratoire AIM, CEA Saclay, Gif-sur-Yvette, France
T. S. Metcalfe
Affiliation:
Space Science Institute, Boulder, CO, USA, email: smathur@spacescience.org
C. Régulo
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife, Spain
A. Jiménez
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife, Spain
S. Bloemen
Affiliation:
Radboud University Nijmegen, The Netherlands
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Abstract

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The dynamo process is believed to drive the magnetic activity of stars like the Sun that have an outer convection zone. Large spectroscopic surveys showed that there is a relation between the rotation periods and the cycle periods: the longer the rotation period is, the longer the magnetic activity cycle period will be. We present the analysis of F stars observed by Kepler for which individual p modes have been measure and with surface rotation periods shorter than 12 days. We defined magnetic indicators and proxies based on photometric observations to help characterise the activity levels of the stars. With the Kepler data, we investigate the existence of stars with cycles (regular or not), stars with a modulation that could be related to magnetic activity, and stars that seem to show a flat behaviour.

Keywords

Stellar activitySeismologyF stars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 222 - 223
Copyright
Copyright © International Astronomical Union 2014 

References

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