Size of the X-Ray Kernel of the Large 1979 August 20 Solar Flare.
AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
Pagination or Media Count:
At the time of the intense Class X5 solar flare on 1979 August 20, monochromatic small raster maps near 7 A were recorded of the flaring active region with 20-in. resolution FWHM by the SOLEX Solar X-Ray SpectrometerSpectroheliograph. From these maps, the spatial extent of the x-ray kernel during the rise of this flare at about 0912 UT was determined to be less than 28 inches. The electron density in the hot flare plasma was estimated to be above 10 to the 11th powercu cm. This is the first soft x-ray measurement of the angular size of such an intense flare.