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SYGP: Symposium Gemeinsame Probleme in Fusions- und astrophysikalischen Plasmen

SYGP 1: Invited Talks

SYGP 1.6: Hauptvortrag

Montag, 12. März 2012, 12:35–13:00, V55.22

Small-scale vortices and shocks in the solar atmosphere — •Manfred Schüssler, Robert H. Cameron, and Rainer Moll — Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany

We report on the occurrence of vortices and shocks in realistic simulations of solar surface convection. In regions of weak magnetic field, the top layers of the photosphere are dominated by shocks driven by convective upflows. A completely different mechanism for local heating occurs in areas threaded by a sizeable vertical magnetic field: viscous dissipation associated with vortex flows extending high into the photosphere. These results are relevant for understanding the different temperature structure in weakly and strongly magnetized regions of the solar atmosphere.