Prompt proton and electron acceleration to relativistic energies in solar flares

Details Prompt proton and electron acceleration to relativistic energies in solar flares Prompt proton and electron acceleration to relativistic energies in solar flares

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988soph..116..157o&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 116, no. 1, 1988, p. 157-162.

Physics

4

Magnetic Field Configurations, Solar Flares, Solar Magnetic Field, Coronal Loops, Magnetic Field Reconnection, Magnetic Flux

Scientific paper

As a possible mechanism for particle acceleration in the impulsive phase of solar flares, a new particle acceleration mechanism in shock waves is proposed; a collisionless fast magnetosonic shock wave can promptly accelerate protons and electrons to relativistic energies, which was found by theory and relativistic particle simulation. The simultaneous acceleration of protons and electrons takes place in a rather strong magnetic field such that ωce ⪆ ωpe. For a weak magnetic field (ωce very low ωpe), strong acceleration occurs to protons only. Resonant protons gain relativistic energies within the order of the ion cyclotron period (much less than 1 s for solar plasma parameters). The electron acceleration time is shorter than the ion-cyclotron period.

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