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Activity on a Li-rich giant: DI Psc revisited

Published online by Cambridge University Press:  07 August 2014

Levente Kriskovics ,
Zsolt Kővári ,
Krisztián Vida  and
Katalin Oláh
Levente Kriskovics
Affiliation:
Konkoly Observatory, Konkoly Thege út 15-17., H-1121, Budapest, Hungary email: kriskovics@konkoly.hu, kovari@konkoly.hu, vidakris@konkoly.hu, olah@konkoly.hu
Zsolt Kővári
Affiliation:
Konkoly Observatory, Konkoly Thege út 15-17., H-1121, Budapest, Hungary email: kriskovics@konkoly.hu, kovari@konkoly.hu, vidakris@konkoly.hu, olah@konkoly.hu
Krisztián Vida
Affiliation:
Konkoly Observatory, Konkoly Thege út 15-17., H-1121, Budapest, Hungary email: kriskovics@konkoly.hu, kovari@konkoly.hu, vidakris@konkoly.hu, olah@konkoly.hu
Katalin Oláh
Affiliation:
Konkoly Observatory, Konkoly Thege út 15-17., H-1121, Budapest, Hungary email: kriskovics@konkoly.hu, kovari@konkoly.hu, vidakris@konkoly.hu, olah@konkoly.hu
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Abstract

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We present a new Doppler imaging study for the Li-rich single K-giant DI Psc. Surface temperature maps are reconstructed for two subsequent rotation cycles. From the time evolution of the spot distribution antisolar-type differential rotation pattern is revealed. We show marks of non-uniform Li-abundance as well. The possible connection between the current evolutionary phase of the star and its magnetic activity is briefly discussed.

Keywords

stars: activitystars: imagingstars: individual (DI Psc)stars: spotsstars: late-type
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 383 - 384
Copyright
Copyright © International Astronomical Union 2014 

References

Charbonnel, C. & Balachadran, S. 2000, A&A, 309, 563Google Scholar
Kitchatinov, L. L. & Rüdiger, G. 2004, AN, 325, 496Google Scholar
Kővári, Zs., Korhonen, H., Strassmeier, K. G., et al. 2013, A&A, 551, 2Google Scholar
Rice, J. B., Wehlau, W. H., & Khokhlova, V. L. 1989, A&A, 208, 179Google Scholar