406 citations · 4.4k across the 115 of their papers we have counts for
5 papers · 2 filters
Compensating Faraday depolarization by magnetic helicity in the solar corona
Axel Brandenburg, Mohira B. Ashurova, Sarah Jabbari
A turbulent dynamo in spherical geometry with an outer corona is simulated to study the sign of magnetic helicity in the outer parts. In agreement with earlier studies, the sign in…
A new look at sunspot formation using theory and observations
Illa R. Losada, Jörn Warnecke, Kolja Glogowski +4
Sunspots are of basic interest in the study of the Sun. Their relevance ranges from them being an activity indicator of magnetic fields to being the place where coronal mass ejecti…
Evolution of coexisting long and short period stellar activity cycles
Axel Brandenburg, Savita Mathur, Travis S. Metcalfe
The magnetic activity of the Sun becomes stronger and weaker over roughly an 11 year cycle, modulating the radiation and charged particle environment experienced by the Earth as "s…
Extended subadiabatic layer in simulations of overshooting convection
Petri J. Käpylä, Matthias Rheinhardt, Axel Brandenburg +5
We present numerical simulations of hydrodynamic overshooting convection in local Cartesian domains. We find that a substantial fraction of the lower part of the convection zone (C…
Spontaneous flux concentrations from the negative effective magnetic pressure instability beneath a radiative stellar surface
Barbara Perri, Axel Brandenburg
The formation of sunspots requires the concentration of magnetic flux near the surface. The negative magnetic pressure instability (NEMPI) might be a possible mechanism for accompl…