The role of betatron acceleration in complex solar bursts

Details The role of betatron acceleration in complex solar bursts The role of betatron acceleration in complex solar bursts

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...77..205k&link_type=abstract

Solar Physics, vol. 77, Apr. 1982, p. 205-230.

Physics

4

Betatrons, Bursts, Electron Acceleration, Solar Activity Effects, Solar X-Rays, Astronomical Models, Microwave Emission, Solar Flares, Solar Magnetic Field

Scientific paper

An explanation in terms of betatron acceleration is attempted for two prominent features of solar hard X-ray emission profiles: the multiplicity manifested by complex impulsive events, and the intense, long-enduring radiation typical of two-stage or extended events. The model employs the basic characteristics of a simple magnetic trap. The observed spectral evolution can be represented effectively by a set of characteristics derived in a thick-target representation. The application to multiple-spike and two-stage bursts is studied, and it is found that impulsive events show no signs of betatron acceleration. However, during the first few minutes of the second stage, the nonimpulsive X-ray emission appears to be consistent with the predictions of the model. Several intense extended events are analyzed and the betatron process is established as a viable candidate for producing the early second-stage emission.

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