Electron precipitation in solar flares - Collisionless effects

Details Electron precipitation in solar flares - Collisionless effects Electron precipitation in solar flares - Collisionless effects

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...139..263v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 139, no. 2, Oct. 1984, p. 263-270.

Astronomy and Astrophysics

Astrophysics

19

Electron Precipitation, Plasma Radiation, Solar Flares, Solar X-Rays, Doppler Effect, Relaxation (Mechanics), Velocity Distribution

Scientific paper

A large fraction of the electrons which are accelerated during the impulsive phase of solar flares stream towards the chromosphere and are unstable to the growth of plasma waves. The linear and non-linear evolution of plasma waves as a function of time is analyzed with the use of a set of rate equations that follow in time the nonlinearly coupled system of plasma waves - ion fluctuations. As an outcome of the fast transfer of wave energy from the beam to the ambient plasma, non-thermal electron tails are formed which can stabilize the anomalous Doppler resonance instability that is responsible for the pitch angle scattering of the beam electrons. The authors estimate the non-collisional losses of the precipitating electrons and discuss the observational implications of their results.

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