A comparison of nonrelativistic electron escape efficiencies for solar flares with and without coronal mass ejections

Details A comparison of nonrelativistic electron escape efficiencies for solar flares with and without coronal mass ejections A comparison of nonrelativistic electron escape efficiencies for solar flares with and without coronal mass ejections

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...422..394k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 422, no. 1, p. 394-399

Physics

9

Electron Flux Density, Solar Corona, Solar Flares, Solar Physics, Stellar Mass Ejection, Radiation Counters, Scintillation Counters, Spectrometers, Venera Satellites, X Ray Detectors

Scientific paper

We have calculated ratios of peak E greater than 70 keV interplanetary electron fluxes to E greater than 55 keV hard X-ray fluences from solar flares observed in 1981-1983 by the Venera 13 and Venera 14 spacecraft to determine the escape efficiencis for nonrelativistic electrons. We used observations from the Solwind coronagraph to determine whether a coronal mass ejection (CME) accompanied each flare. We find that the escape efficiencies of nine events associated with CMEs are similar to those of the eight events not associated with CMEs. This indicates that the population of nonrelativistic electrons produced by a CME-driven shock is at most comparable to the population of nonrelativistic electrons escaping from the associated flare. However, an extended electron injection phase is not considered, and there is at least one well-observed counterexample of an electron event produced in a coronal shock.

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