High spectral resolution, high sensitivity microwave and associated hard X-ray bursts

Details High spectral resolution, high sensitivity microwave and associated hard X-ray bursts High spectral resolution, high sensitivity microwave and associated hard X-ray bursts

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13..191s&link_type=abstract

Advances in Space Research, Volume 13, Issue 9, p. 191-194.

Physics

4

Scientific paper

We have carried out mm-wavelength (18 - 23) GHz observations of solar bursts in June 1989, in Brazil. Nine of the bursts were observed simultaneously with the Hard X-ray Burst Spectrometer (HXRBS) on the Solar Maximum Mission (SMM). The Owens Valley Radio Observatory (OVRO) observed five of these events from 1 to 18 GHz. To date, we have analyzed six of these events and the preliminary results are: (i) The turnover frequency of all of these bursts were in the frequency range of 7 - 11 GHz and the radio spectral index ranged from -0.3 to -5.3 (ii) In three bursts, dominant features of high energy (>= 200 keV) X-rays coincided in time with mm-wavelength peaks, suggesting that the high energy electrons are responsible for the mm-wavelength emission.

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