The X flare of 1991 November 15 - Coordinated Mees/Yohkoh observations

Details The X flare of 1991 November 15 - Coordinated Mees/Yohkoh observations The X flare of 1991 November 15 - Coordinated Mees/Yohkoh observations

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44l.111c&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 5, p. L111-L115.

Astronomy and Astrophysics

Astronomy

24

Japanese Spacecraft, Solar Flares, Solar Observatories, Solar X-Rays, Spaceborne Astronomy, X Ray Spectra, Current Density, H Alpha Line, Solar Magnetic Field

Scientific paper

This is a preliminary report on two unique new results from coordinated observations at Mees Solar Observatory and Yohkoh of the X1.5 flare of November 15, l991 using vector magnetograms, H-alpha imaging spectra, X-ray images, and X-ray spectra. First, we find a close spatial relationship between H-alpha redshifts and X-rays from a flare loop and its footpoints at a time of large X-ray blueshifts. Second, we find that impulsive-phase hard X-rays originate in regions that are new, but not coincident with, the peaks of the vertical electrical current density distribution in AR 6919.

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