Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313..440o&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 313, Feb. 1, 1987, p. 440-448.
Astronomy and Astrophysics
Astrophysics
29
Magnetoacoustic Waves, Particle Acceleration, Shock Wave Propagation, Solar Flares, Solar Protons, Solar Wind, Ion Cyclotron Radiation, Plasma-Electromagnetic Interaction, Stellar Models
Scientific paper
Theoretical and numerical analyses are carried out for plasma heating and proton acceleration (V x B) due to magnetosonic shock waves (MSW) in the solar plasma. A simple model is developed for V x B acceleration by examining a single-particle orbit in a high-amplitude monochromatic electrostatic wave moving in a direction perpendicular to an external magnetic field. The particle can attain the E x B drift velocity. The model is used to derive the maximum velocity a particle can attain when driven by quasi-parallel and quasi-perpendicular MSW. Acceleration is found to be significantly stronger witn the latter, as is demonstrated with results of a 2.5 dimension simulation of acceleration by a quasi-perpendicular MSW. Implications of the results for modeling coronal heating and proton acceleration by MSWs produced by solar flares are discussed.
Ohsawa Yukiharu
Sakai Jun-Ichi
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