GREGOR Workshop, 24-26 July 2002, Göttingen, Germany
AN 324, No.4, 410-411 (2003)

Sven Wedemeyer (Institut für Theoretische Physik und Astrophysik, Universität Kiel, 24098 Kiel, Germany),
Bernd Freytag (Department for Astronomy and Space Physics, Uppsala University, Box 515, 75120 Uppsala, Sweden),
Matthias Steffen (Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany),
Hans-Günter Ludwig ( Lund Observatory, Box 43, 22100 Lund, Sweden),
Hartmut Holweger (Institut für Theoretische Physik und Astrophysik, Universität Kiel, 24098 Kiel, Germany),

3-D hydrodynamic simulations of the solar chromosphere


We present first results of three-dimensional numerical simulations of the non-magnetic solar chromosphere, computed with the radiation hydrodynamics code CO5BOLD. Acoustic waves which are excited at the top of the convection zone propagate upwards into the chromosphere where the waves steepen into shocks. The interaction of the waves leads to the formation of complex structures which evolve on short time scales. Consequently, the model chromosphere is highly dynamical, inhomogeneous, and thermally bifurcated.


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