Back to Volume
Paper: Simulations of Chromospheric Heating by Ambipolar Diffusion
Volume: 463, 2nd ATST-EAST Workshop in Solar Physics: Magnetic Fields from the Photosphere to the Corona
Page: 281
Authors: Khomenko, E.; Collados Vera, M.
Abstract: We propose a mechanism for efficient heating of the solar chromosphere based on non-ideal plasma effects. Three ingredients are needed for the work of this mechanism: (1) presence of neutral atoms; (2) presence of a non-potential magnetic field; (3) decrease of the collisional coupling of the plasma. Due to the decrease of collisional coupling, a net relative motion appears between the neutral and ionized components, usually referred to as “ambipolar diffusion.” This results in a significant enhancement of current dissipation as compared to the classical MHD case. We propose that the current dissipation in this situation is able to provide enough energy to heat the chromosphere by several kK on the time scale of minutes, or even seconds. In this paper, we show that this energy supply might be sufficient to balance the radiative energy losses of the chromosphere.
Back to Volume