Second-stage acceleration in a limb-occulted flare

Details Second-stage acceleration in a limb-occulted flare Second-stage acceleration in a limb-occulted flare

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...75..245h&link_type=abstract

Solar Physics, vol. 75, Jan. 1982, p. 245-261.

Astronomy and Astrophysics

Astronomy

38

Energetic Particles, Particle Acceleration, Radio Astronomy, Shock Waves, Solar Flares, Solar Limb, Bursts, Electron Acceleration, Electron Energy, Interplanetary Medium, Occultation, Spectrum Analysis, X Ray Sources

Scientific paper

From radio observations it is known that two distinct groups of phenomena occur in large solar flares. The phenomena are related to an impulsive phase of approximately 100 s duration in the early stage of a flare and a following second phase lasting for tens of minutes. A study is presented of the limb-occulted flare event of July 22, 1972, giving particular attention to the second stage particle acceleration. The study takes into account hard X-ray, energetic particle, and radio observations. The conducted analysis shows that second stage acceleration is physically distinct from the impulsive phase, and is characterized by continuous and widespread electron acceleration to high energies, most likely by the type II burst shock wave.

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