How can large-scale twisted magnetic structures naturally emerge from buoyancy instabilities?
How can large-scale twisted magnetic structures naturally emerge from buoyancy instabilities?
We consider the 3D instability of a layer of horizontal magnetic field in a polytropic atmosphere where, contrary to previous studies, the field lines in the initial state are not unidirectional. We show that if the twist is initially concentrated inside the unstable layer, the modifications of the instability reported …