Conveners
Plenary 1
- Eduard Kontar (University of Glasgow)
In global dynamo models, the process of magnetic flux emergence through the stellar convection zone is thought to be crucial. In the Sun, it is the strong toroidal structures built at the base of the convection zone which are assumed to be unstable to a buoyancy instability and rise through the convection zone to produce sunspots. The details of how these buoyant structures are formed, evolve...
Mean-field dynamo theory is a rich field that tries to reproduce and often predict the large-scale behavior of a turbulent system. Numerical simulations play the same role as astronomical observations, except that the former ones can be done under controlled conditions while the latter ones have the advantage of being more in the asymptotic regime of large magnetic and fluid Reynolds numbers....
What sets the 11-year period of the solar activity cycle? Why do sunspots appear in the butterfly wings which propagate equatorward over the course of a cycle? The Babcock-Leighton flux-transport model attempts to answer these questions but has free paramters. Some of these free parameters have recently been observationally constrained. In particular, the meridional flow has recently been...
The results of helioseismological inferences of subsurface flow velocities by time–distance techniques are used to analyse the spatial structure of subphotospheric convection. The source data are obtained from the Helioseismic and Magnetic Imager onboard the Solar Dynamics Observatory from May 2010 to September 2020. The helioseismic-inversion results produce the three-dimensional flow fields...
