Chromospheric Dynamics and Line Formation

Details Chromospheric Dynamics and Line Formation Chromospheric Dynamics and Line Formation

2007-07-14

arxiv.org/abs/0707.2166v1

Astronomy and Astrophysics

Astrophysics

Lecture notes and review, held at Kodaikanal Winter School on Solar Physics, Dec 2006. This version contains corrected page nu

Scientific paper

10.1063/1.2756786

The solar chromosphere is very dynamic, due to the presence of large amplitude hydrodynamic waves. Their propagation is affected by NLTE radiative transport in strong spectral lines, which can in turn be used to diagnose the dynamics of the chromosphere. We give a basic introduction into the equations of NLTE radiation hydrodynamics and describe how they are solved in current numerical simulations. The comparison with observation shows that one-dimensional codes can describe strong brightenings quite well, but the overall chromospheric dynamics appears to be governed by three-dimensional shock propagation.

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