1201.4990 (Yurii V. Dumin)

Heating the Solar Atmosphere by the Self-Enhanced Thermal Waves Caused by the Dynamo Processes    [PDF]

Yurii V. Dumin

We discuss a possible mechanism for heating the solar chromosphere and lower part of the transition region by the ensemble of thermal waves, generated by the photospheric dynamo and propagating upwards with increasing magnitudes. These waves are self-sustained and amplified due to the specific dependence of the efficiency of heat release by Ohmic dissipation on the ratio of the collisional to gyro- frequencies, which in its turn is determined by the temperature profile formed in the wave. In the case of sufficiently strong driving, such a mechanism can increase the plasma temperature by an order of magnitude, i.e. it may be responsible for heating the chromosphere and the lower part of the transition region.

View original: http://arxiv.org/abs/1201.4990