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| 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. |
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