The spatial, spectral, and temporal character of the hard X-ray flare of 1982 February 3

Details The spatial, spectral, and temporal character of the hard X-ray flare of 1982 February 3 The spatial, spectral, and temporal character of the hard X-ray flare of 1982 February 3

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337.1003n&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 337, Feb. 15, 1989, p. 1003-1016.

Astronomy and Astrophysics

Astrophysics

13

Solar Flares, Solar Spectra, Solar X-Rays, Sunspots, H Alpha Line, Microwave Emission, Microwave Interferometers, Solar Magnetic Field, Solar Maximum Mission, X Ray Imagery

Scientific paper

This paper presents spatially resolved, hard and soft X-ray, 17 GHz microwave and H-alpha observations of an X1.1 flare which occurred on February 3, 1982. The bulk of the 25-50 keV hard X-ray emission during impulsive peaks is produced by two sources of differing brightness which are separated by about 50 arcsec. Soft X-ray images reveal a single component that resides between the two hard sources. On the decay of the event, X-ray spectra provide direct evidence for a hot component that dominates the less than 50 keV flux. Hard X-ray images obtained at these times show a single source that is nearly coincident with the soft X-ray source. Interferometric microwave observations obtained during impulsive peaks support the idea that microwave emission is produced in the vicinity of high magnetic fields near the sunspot. The influence of an asymmetric loop or system of asymmetric loops is essential to interpreting the observations.

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