Positional characteristics of meter-decameter wavelength bursts associated with hard X-ray bursts

Details Positional characteristics of meter-decameter wavelength bursts associated with hard X-ray bursts Positional characteristics of meter-decameter wavelength bursts associated with hard X-ray bursts

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...79..107k&link_type=abstract

Solar Physics, vol. 79, July 1982, p. 107-119.

Astronomy and Astrophysics

Astronomy

4

Decametric Waves, Solar X-Rays, Type 3 Bursts, Type 4 Bursts, Centimeter Waves, Solar Corona, Type 2 Bursts, X Ray Astronomy

Scientific paper

Isolated and grouped type III bursts have been observed in temporal association with impulsive hard X-ray bursts in the 26-154 keV range, down to frequencies as low as 30 MHz and out to a distance of 3.1 solar radii from the disk center. The bursts occurred in regions whose electron density may have been as much as 20 times higher than that of the Newkirk-Saito model. The present observations indicate that electron acceleration/injection occurs over a region covering a wide range of magnetic field lines. It is noted that, of the two gradual hard X-ray bursts observed in association with type IV bursts, one was accompanied by a type II event, while the other was not, although both exhibited the same characteristics. It is suggested that the gradual burst associated with a type IV only involved electrons which are trapped in the plasmoid which produces the meter-decameter emission, while another fraction of the population is trapped in the low-lying loops which produce the hard X-ray and centimeter radiation.

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