Observation of electron acceleration at widely separated altitudes in the solar corona

Details Observation of electron acceleration at widely separated altitudes in the solar corona Observation of electron acceleration at widely separated altitudes in the solar corona

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13s.295k&link_type=abstract

Advances in Space Research, Volume 13, Issue 9, p. 295-298.

Physics

5

Scientific paper

Spectrographic and imaging observations of meter wave fast drift bursts are presented which imply the quasi-simultaneous particle acceleration at two different sites in the corona: one below 0.5 Rsolar, where electron beams rising in the corona are produced, and one above 1.0 Rsolar from which electron beams propagate downward as revealed by reverse drift bursts. This configuration produces three groups of bursts with a similar spatial brightness distribution during 2.5 hours, demonstrating the overall stability of the large-scale magnetic field structure. The source structure of the reverse drift bursts is consistent with particle acceleration in a coronal helmet streamer neutral sheet. The same kind of high coronal acceleration sites is necessary for explaining the energy spectrum observed in interplanetary electron events.

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