No Sun-like dynamo on the active star ζ Andromedae from starspot asymmetry

R. M. Roettenbacher (), J. D. Monnier, H. Korhonen, A. N. Aarnio, F. Baron, X. Che, R. O. Harmon, Zs. Kővári, S. Kraus, G. H. Schaefer, G. Torres, M. Zhao, T. A. ten Brummelaar, J. Sturmann and L. Sturmann
Additional contact information
R. M. Roettenbacher: University of Michigan
J. D. Monnier: University of Michigan
H. Korhonen: Finnish Centre for Astronomy with ESO (FINCA), University of Turku
A. N. Aarnio: University of Michigan
F. Baron: University of Michigan
X. Che: University of Michigan
R. O. Harmon: Ohio Wesleyan University
Zs. Kővári: Konkoly Observatory, Research Center for Astronomy and Earth Sciences, Hungarian Academy of Sciences
S. Kraus: University of Michigan
G. H. Schaefer: Center for High Angular Resolution Astronomy, Georgia State University
G. Torres: Harvard-Smithsonian Center for Astrophysics
M. Zhao: University of Michigan
T. A. ten Brummelaar: Center for High Angular Resolution Astronomy, Georgia State University
J. Sturmann: Center for High Angular Resolution Astronomy, Georgia State University
L. Sturmann: Center for High Angular Resolution Astronomy, Georgia State University

Nature, 2016, vol. 533, issue 7602, 217-220

Abstract: Infrared interferometry imaging of the old, magnetically active star ζ Andromedae reveals an asymmetric distribution of starspots, unlike the north–south starspot symmetry observed on the Sun, meaning the underlying dynamo mechanisms must be different.

Date: 2016
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DOI: 10.1038/nature17444

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