Various scenarios for the equatorward migration of sunspots
- Resource Type
- Working Paper
- Authors
- Elstner, Detlef; Fournier, Yori; Arlt, Rainer
- Source
- Proc. IAU 15 (2019) 134-137
- Subject
- Astrophysics - Solar and Stellar Astrophysics
- Language
The profile of the differential rotation together with the sign of the alpha-effect determine the dynamo wave direction. In early models of the solar dynamo the dynamo wave often leads to a poleward migration of the activity belts. Flux transport by the meridional flow or the effect of the surface shear layer are possible solutions. In a model including the corona, we show that various migrations can be obtained by varying the properties of the corona. A new dynamo of Babcock-Leighton type also leads to the correct equatorward migration by the non-linear relation between flux density and rise time of the flux.
Comment: 4 pages, 4 figures