The correlation of solar flare hard X-ray bursts with Doppler blueshifted soft X-ray flare emission

Details The correlation of solar flare hard X-ray bursts with Doppler blueshifted soft X-ray flare emission The correlation of solar flare hard X-ray bursts with Doppler blueshifted soft X-ray flare emission

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...421l..55b&link_type=abstract

Astrophysical Journal, Part 2 (ISSN 0004-637X), vol. 421, no 1, p. L55-L58

Astronomy and Astrophysics

Astrophysics

41

Chromosphere, Data Processing, Fourier Transformation, Gamma Rays, Solar Flares, X Ray Spectra, Gamma Ray Observatory, Solar Maximum Mission, Spectrometers, Wavelengths

Scientific paper

We have investigated the temporal correlation between hard X-ray bursts and the intensity of Doppler blueshifted soft X-ray spectral line emission. We find a strong correlation for many events that have intense blueshifted spectral signatures and some correlation in events with modest blueshifts. The onset of hard X-rays frequently coincides to within a few seconds with the onset of blueshifted emission. The peak intensity of blueshifted emission is frequently close in time to the peak of the hard X-ray emission. Decay rates of the blueshifted and hard X-ray emission are similar, with the decay of the blueshifted emission tending to lag behind the hard X-ray emission in some cases. There are, however, exceptions to these conclusions, and, therefore, the results should not be generalized to all flares. Most of the data for this work were obtained from instruments flown on the Japanese Yohkoh solar spacecraft.

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