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The new age of spotted star research using Kepler and CHARA

Published online by Cambridge University Press:  07 August 2014

Rachael M. Roettenbacher ,
John D. Monnier ,
Robert O. Harmon  and
Heidi H. Korhonen
Rachael M. Roettenbacher
Affiliation:
Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI, United States email: rmroett@umich.edu
John D. Monnier
Affiliation:
Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI, United States email: monnier@umich.edu
Robert O. Harmon
Affiliation:
Department of Physics and Astronomy, Ohio Wesleyan University, 61 S. Sandusky Street, Delaware, OH, United States email: roharmon@owu.edu
Heidi H. Korhonen
Affiliation:
Finnish Center for Astronomy with ESO, University of Turku, Väisälänti 20, FI-21500 Piikkiö, Finland email: heidi.h.korhonen@utu.fi
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Abstract

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With the precise, nearly-continuous photometry from the Kepler satellite and the sub-milliarcsecond resolving capabilities of the CHARA Array, astronomy is entering a new age for the imaging and understanding of stellar magnetic activity. We present first results from our Guest Observer Program, where 180 single-epoch surface image reconstructions of KIC 5110407 have revealed differential rotation and hints of magnetic activity cycles based on both spot and flare variations. Analysis of our larger, full dataset will establish in unprecedented detail how surface magnetic activity correlates with stellar age and spectral type. In addition to Kepler work, we have harnessed the power of the world's largest infrared interferometer to “directly” image the spotted surfaces of a few of the closest RS CVn systems, allowing a comparison of contemporaneous Doppler and light-curve inversion imaging techniques.

Keywords

stars: spotsstars: activitystars: imagingstars: low-mass
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 212 - 215
Copyright
Copyright © International Astronomical Union 2014 

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