Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-04T18:00:24.428Z Has data issue: false hasContentIssue false
  • English
  • Français

Differential Rotation in Two RS CVn Systems: σ Gem and ζ And

Published online by Cambridge University Press:  23 April 2012

Zsolt Kővári ,
János Bartus ,
Levente Kriskovics ,
Katalin Oláh ,
Krisztián Vida ,
Orsolya Ribárik  and
Klaus G. Strassmeier
Zsolt Kővári
Affiliation:
Konkoly Observatory, Konkoly Thege út 15-17., H-1121 Budapest, Hungary email: kovari@konkoly.hu, kriskovics@konkoly.hu, olah@konkoly.hu, vida@konkoly.hu, wennot@konkoly.hu
János Bartus
Affiliation:
Konkoly Observatory, Konkoly Thege út 15-17., H-1121 Budapest, Hungary email: kovari@konkoly.hu, kriskovics@konkoly.hu, olah@konkoly.hu, vida@konkoly.hu, wennot@konkoly.hu Leibniz Institute for Astrophysics Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany email: jbartus@aip.de, kstrassmeier@aip.de
Levente Kriskovics
Affiliation:
Konkoly Observatory, Konkoly Thege út 15-17., H-1121 Budapest, Hungary email: kovari@konkoly.hu, kriskovics@konkoly.hu, olah@konkoly.hu, vida@konkoly.hu, wennot@konkoly.hu
Katalin Oláh
Affiliation:
Konkoly Observatory, Konkoly Thege út 15-17., H-1121 Budapest, Hungary email: kovari@konkoly.hu, kriskovics@konkoly.hu, olah@konkoly.hu, vida@konkoly.hu, wennot@konkoly.hu
Krisztián Vida
Affiliation:
Konkoly Observatory, Konkoly Thege út 15-17., H-1121 Budapest, Hungary email: kovari@konkoly.hu, kriskovics@konkoly.hu, olah@konkoly.hu, vida@konkoly.hu, wennot@konkoly.hu
Orsolya Ribárik
Affiliation:
Konkoly Observatory, Konkoly Thege út 15-17., H-1121 Budapest, Hungary email: kovari@konkoly.hu, kriskovics@konkoly.hu, olah@konkoly.hu, vida@konkoly.hu, wennot@konkoly.hu
Klaus G. Strassmeier
Affiliation:
Leibniz Institute for Astrophysics Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany email: jbartus@aip.de, kstrassmeier@aip.de
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The differentially rotating convective envelope is an indispensable element of the magnetic dynamo working in RS CVn-systems. Tidal coupling is responsible for maintaining fast rotation, and also the observed high level of magnetic activity. In this work, we compare the physical properties of two well known RS CVn-type binaries, that is the long-period system σ Gem and the ellipsoidal variable ζ And. For the comparison, we use the results obtained from processing time-series Doppler images. We also aim at understanding how differential rotation could be affected by tidal forces in such close binaries.

Keywords

stars: activitystars: imagingstars: individual (σ Gem, ζ And)stars: spotsstars: late-type
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S282: From Interacting Binaries to Exoplanets: Essential Modeling Tools , July 2011 , pp. 197 - 198
Copyright
Copyright © International Astronomical Union 2012

References

Holzwarth, V. & Schüssler, M. 2000, AN, 321, 175Google Scholar
Holzwarth, V. & Schüssler, M. 2002, AN, 323, 399Google Scholar
Korhonen, H., Wittkowski, M., Kővári, Zs., et al. , 2010, A&A, 515, A14Google Scholar
Kővári, Zs., Strassmeier, K. G., Bartus, J., et al. , 2001, A&A, 373, 199Google Scholar
Kővári, Zs., Strassmeier, K. G., Granzer, T., et al. , 2004, A&A, 417, 1047Google Scholar
Kővári, Zs., Bartus, J., Strassmeier, K. G., et al. , 2007a, A&A, 463, 1071Google Scholar
Kővári, Zs., Bartus, J., Strassmeier, K. G., et al. , 2007b, A&A, 474, 165Google Scholar
Scharlemann, E. T. 1981, ApJ, 246, 292CrossRefGoogle Scholar
Scharlemann, E. T. 1982, ApJ, 253, 298CrossRefGoogle Scholar
Schrijver, C. J. & Zwaan, C. 1991, A&A, 251, 183Google Scholar