Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.220..279a&link_type=abstract
In ESA The Hydromagnetics of the Sun p 279-280 (SEE N85-25091 14-92)
Astronomy and Astrophysics
Astronomy
Solar Corona, Solar Flares, Solar Heating, Solar Maximum Mission, X Ray Astronomy, Chromosphere, Energy Transfer, Magnetohydrodynamic Flow, Solar X-Rays
Scientific paper
The presence of chromospheric material evaporating in response to localized heating to coronal temperatures is inferred from Solar Maximum Mission observations of systematic plasma upflows during the rise of the soft X-ray emission in solar flares. This period corresponds also to the interval during which energy is deposited in the chromosphere, as inferred from the impuslive hard X-ray emission. The analysis of the soft X-ray emission from the coronal source and the plasma upflows suggests that chromospheric evaporation can be considered as the main mechanism responsible for the formation of the coronal thermal plasma during a flare. This occurs by accumulation of the evaporated plasma in a magnetically confined coronal region, provided the upflows have an electron density of the order of 100 billion cc, and an electron temperature of 10 to 20 million K.
Antonucci Ester
Gabriel Alan H.
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