Shock-drift accelerated electrons and n-distribution
Abstract
Recently soft X-ray spectra observed during the impulsive phase of several solar flares have been explained by the presence of the n-distribution function of superthermal electrons. We examine if electrons with such a distribution function can be produced in a shock, e.g. in a flare termination shock. The distribution functions of reflected electrons at quasi-perpendicular shocks are analytically derived and compared with the n-distributions. We consider an influence of the electrostatic cross-shock potential, shock curvature, and a role of the upstream seed population on these distributions. We found that a high-energy part of the distribution of electrons reflected at a quasi-perpendicular shock could be very well fitted by the n-distribution. It gives a chance to detect the flare termination shock.
- Publication:
-
SDO 2016: Unraveling the Sun's Complexity
- Pub Date:
- October 2016
- Bibcode:
- 2016usc..confE.124V
- Keywords:
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- SDO;
- SDO 2016;
- Solar Dynamic Observatory;
- SDO-2016;
- SDO Workshop;
- SDO 2016: Unraveling the Sun's Complexity