Average height of hard X-ray sources in solar flares

Details Average height of hard X-ray sources in solar flares Average height of hard X-ray sources in solar flares

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44l..89m&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 5, p. L89-L93.

Astronomy and Astrophysics

Astronomy

26

Electron Acceleration, Solar Flares, Solar X-Rays, Spaceborne Telescopes, Statistical Analysis, Japanese Spacecraft, X Ray Telescopes

Scientific paper

The average height of hard X-ray sources in solar flares and the average-height variation as a function of X-ray energy are statistically derived from results of the first five months of observations with the Yohkoh Hard X-ray Telescope. It was found (from a comparison with the H-alpha flare location from NOAA flare reports) that the average height in the HXT L-band of hard X-ray sources is (9.7 +/- 2.0) x 10 exp 3 km above the photosphere. The average height was found to decrease with increasing X-ray energy: (-1.0 +/- 0.3) x 10 exp 3 km, (-2.0 +/- 0.5) x 10 exp 3 km, and (-3.2 +/- 0.7) x 10 exp 3 km for the M1 band, M2-band, and H-band, respectively, with respect to the L-band height.

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