J
Jaan Pelt
Researcher at Tartu Observatory
Publications - 63
Citations - 1571
Jaan Pelt is an academic researcher from Tartu Observatory. The author has contributed to research in topics: Differential rotation & Light curve. The author has an hindex of 23, co-authored 63 publications receiving 1394 citations. Previous affiliations of Jaan Pelt include University of Oslo & University of California, Los Angeles.
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Journal ArticleDOI
Magnetically controlled stellar differential rotation near the transition from solar to anti-solar profiles
Bidya Binay Karak,Petri J. Käpylä,Petri J. Käpylä,Maarit J. Käpylä,Axel Brandenburg,Axel Brandenburg,N. Olspert,Jaan Pelt +7 more
TL;DR: In this paper, the effect of a dynamo-generated magnetic field on the large-scale flows, particularly on the possibility of bistable behaviour of differential rotation, was studied. But the results were limited to a rotating spherical shell with a set of different radiative conductivities.
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Magnetic activity in the young solar analog LQ hydrae. I. Active longitudes and cycles
TL;DR: In this article, the authors present the first evidence that a single active dwarf of solar type can show a long-lived, nonaxisymmetric spot distribution - active longitudes on opposite hemispheres, similar to evolved, rapidly rotating RS CVn-type binary stars.
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Multiple dynamo modes as a mechanism for long-term solar activity variations
Maarit J. Käpylä,Petri J. Käpylä,Petri J. Käpylä,Petri J. Käpylä,N. Olspert,Axel Brandenburg,Jörn Warnecke,Jörn Warnecke,Bidya Binay Karak,Bidya Binay Karak,Jaan Pelt,Jaan Pelt +11 more
TL;DR: In this paper, the authors analyze a solution of a solar-like DNS that was evolved for roughly 80 magnetic cycles of 4.9 years and where epochs of irregular behavior are detected.
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An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434*
I. Burud,Jens Hjorth,Andreas O. Jaunsen,M. I. Andersen,H. Korhonen,J. W. Clasen,Jaan Pelt,Frank P. Pijpers,Pierre Magain,R. Østensen +9 more
TL;DR: In this paper, the authors present optical I-band light curves of the gravitationally lensed double QSO B1600+434 from observations obtained at the Nordic Optical Telescope (NOT) between 1998 April and 1999 November.
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Identification and classification of textile fibres using ATR-FT-IR spectroscopy with chemometric methods.
TL;DR: It was found that approximate quantitative composition is obtainable if for the mixed fibre sample a number of spectra are averaged in order to minimize the effect of structural inhomogeneity, and semi-quantitative analysis of mixed fibres with PCA were investigated.