High-velocity evaporation during the impulsive phase of the 1984 April 24 flare

Details High-velocity evaporation during the impulsive phase of the 1984 April 24 flare High-velocity evaporation during the impulsive phase of the 1984 April 24 flare

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apjs...73..137a&link_type=abstract

(NASA and University of New Hampshire, Workshop on Impulsive Solar Flares, 2nd, Durham, NH, Sept. 26-28, 1988) Astrophysical Jou

Physics

Plasma Physics

22

Chromosphere, Plasma Physics, Solar Flares, Solar X-Rays, Emission Spectra, Evaporation, Plasma Temperature, Solar Maximum Mission, Spectrometers

Scientific paper

An analysis is given of the soft X-ray emission, detected with the bent crystal spectrometer of the SMM, during the initial part of the impulsive phase of the April 24, 1984 flare. In this period, soft X-rays are emitted uniquely by a moving source, which can be identified with plasma evaporating from the chromosphere with velocities between 100 and 800 km/s, and they can be characterized by temperatures between 1.5 x 10 to the 7th and 4 x 10 to the 7th K. Three successive injections of evaporating plasma can be clearly distinguished. A mass and energy balance analysis ensures that plasma is almost continuously injected in the flaring loops during the period of observation of upflows.

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