High-resolution X-ray spectra of solar flares. VIII - Mass upflow in the large flare of 1980 November 7

Details High-resolution X-ray spectra of solar flares. VIII - Mass upflow in the large flare of 1980 November 7 High-resolution X-ray spectra of solar flares. VIII - Mass upflow in the large flare of 1980 November 7

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...306..327k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 306, July 1, 1986, p. 327-339. NASA-supported research.

Astronomy and Astrophysics

Astronomy

25

Atmospheric Circulation, Mass Flow, Solar Atmosphere, Solar Flares, Solar X-Rays, X Ray Spectra, High Resolution, Spaceborne Astronomy

Scientific paper

The large flare of November 7, 1980 provides a unique opportunity to investigate the upward-moving plasma seen during the early stages of many flares. Soft X-ray spectroscopic data obtained by the Solar Flare X-ray (SOLFLEX) instruments on board the Air Force P78-1 satellite have been used to determine the spatial extent, turbulent velocity, temperature, and emission measure of the blueshifted and stationary plasmas, as well as the upward velocity of the blueshifted component alone. Two geometries are considered in calculating the resultant mass and energy balance. In addition, coincident hard X-ray data was acquired from the HXRBS instrument on board the SMM satellite to determine the relative timing and enertics of the hard and soft X-ray flare plasmas. These results are compared with the predictions of the chromospheric evaporation hypothesis. It is concluded that electron-induced evaporation plays a minor role in this flare, and that another mechanism must account for the observed blueshifted emission.

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