The impulsive and gradual phases of a solar limb flare as observed from the solar maximum mission satellite

Details The impulsive and gradual phases of a solar limb flare as observed from the solar maximum mission satellite The impulsive and gradual phases of a solar limb flare as observed from the solar maximum mission satellite

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...78..201p&link_type=abstract

Solar Physics, vol. 78, June 1982, p. 201-213. Research supported by the Lockheed Independent Research Program;

Astronomy and Astrophysics

Astronomy

34

Satellite Observation, Solar Flares, Solar Limb, Solar Maximum Mission, Ultraviolet Spectra, X Ray Spectra, Chromosphere, Photosphere, Solar Corona, Solar Spectra, Spatial Resolution, Spectral Resolution, Stellar Models, Temporal Resolution, Ultraviolet Astronomy, X Ray Astronomy

Scientific paper

Simultaneous observations of a solar limb flare in the X-ray and ultraviolet regions of the spectrum are presented. Temporal and spectral X-ray observations were obtained for the 25-300 keV range while temporal, spectral, and spatial X-ray observations were obtained for the 30-0.3 keV range. The ultraviolet observations were images with a 10 arcsec spatial resolution in the line of O V and Fe XXI. The hard X-ray and O V data indicate that the impulsive phase began in the photosphere or chromosphere and continued for several minutes as materials was ejected into the corona. Impulsive excitation was observed up to 30,000 km above the solar surface at specific points in the flare loop. The Fe XXI observations indicate a preheating before the impulsive phase and showed the formation of hot post-flare loops. This later formation was confirmed by soft X-ray observations. These observations provide limitations for current flare models and will provide the data needed for initial conditions in modeling the concurrent coronal transient.

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