Prompt simultaneous acceleration of protons and electrons to relativistic energies by shock waves in solar flares

Details Prompt simultaneous acceleration of protons and electrons to relativistic energies by shock waves in solar flares Prompt simultaneous acceleration of protons and electrons to relativistic energies by shock waves in solar flares

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...332..439o&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 332, Sept. 1, 1988, p. 439-446.

Astronomy and Astrophysics

Astrophysics

24

Particle Acceleration, Relativistic Particles, Shock Waves, Solar Electrons, Solar Flares, Solar Protons, Collisionless Plasmas, Ion Cyclotron Radiation, Particle Energy

Scientific paper

It is shown by theory and fully relativistic, electromagnetic particle simulation that a collisionless fast magnetosonic shock wave can promptly accelerate protons and electrons to relativistic energies; proton energies greater than about 10 to the 9th eV and electron energies greater than about 10 to the 6th eV. The time needed for the proton acceleration is of the order of the ion cyclotron period and is quite short (much less than 1 s for solar plasmas). The electron acceleration time is shorter than the ion cyclotron period. The present shock acceleration mechanism can explain important features of observed particle acceleration in the impulsive phase of solar flares; simultaneous and prompt acceleration of protons and electrons to relativistic energies.

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