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14 papers · 2 filters
Three-dimensional evolution of erupted flux ropes from the Sun (2-20 Rs) to 1 AU
A. Isavnin, A. Vourlidas, E. K. J. Kilpua
Studying the evolution of magnetic clouds entrained in coronal mass ejections using in-situ data is a difficult task since only a limited number of observational points is availabl…
Role of longitudinal activity complexes for solar and stellar dynamos
M. J. Mantere, Petri J. Käpylä, Jaan Pelt
In this paper we first discuss observational evidence of longitudinal concentrations of magnetic activity in the Sun and rapidly rotating late-type stars with outer convective enve…
Flux concentrations in turbulent convection
P. J. Käpylä, A. Brandenburg, N. Kleeorin +2
We present preliminary results from high resolution magneto-convection simulations where we find the formation of flux concentrations from an initially uniform magnetic field. We c…
Solar-like differential rotation and equatorward migration in a convective dynamo with a coronal envelope
Jörn Warnecke, Petri J. Käpylä, Maarit. J. Mantere +1
We present results of convective turbulent dynamo simulations including a coronal layer in a spherical wedge. We find an equatorward migration of the radial and azimuthal fields si…
Flip-flops of FK Comae Berenices
Thomas Hackman, Jaan Pelt, Maarit J. Mantere +6
FK Comae is a rapidly rotating magnetically active star, the light curve of which is modulated by cool spots on its surface. It was the first star where the "flip-flop" phenomenon…
Multi-point shock and flux rope analysis of multiple interplanetary coronal mass ejections around 2010 August 1 in the inner heliosphere
C. Möstl, C. J. Farrugia, E. K. J. Kilpua +20
We present multi-point in situ observations of a complex sequence of coronal mass ejections (CMEs) which may serve as a benchmark event for numerical and empirical space weather pr…