Radio evidence for a delayed acceleration process in solar flares

Details Radio evidence for a delayed acceleration process in solar flares Radio evidence for a delayed acceleration process in solar flares

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986soph..105..383k&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 105, June 1986, p. 383-398.

Physics

21

Particle Acceleration, Solar Flares, Solar Radio Bursts, Solar X-Rays, Temporal Distribution, High Energy Electrons, Solar Magnetic Field

Scientific paper

Evidence for a delayed acceleration process in solar flares is presented in the form of an analysis of simultaneous observations in microwaves, decimetre and metrewaves, and hard X-rays of six "delayed" gradual bursts which appear 0.5 - 1 hr after the strong main bursts have faded. From these observations it is suggested that (1) electrons are accelerated up to ≡MeV even some tens of minutes after the impulsive phase acceleration has almost ceased, (2) the delayed acceleration occurs in a large magnetic structure extending to a height of at least 2×105km, and (3) the radio source has columnar structure with the microwave source predominantly near a leg or legs and the metrewave source near the top of the magnetic structure.

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