Size of the x-ray kernel of the large 1979 august 20 solar flare. Interim report

Technical Report · Fri Nov 28 00:00:00 EST 1980

OSTI ID:5625647

Landecker, P B; McKenzie, D L

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 Spectrometer/Spectroheliograph. 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 power/cu cm. This is the first soft x-ray measurement of the angular size of such an intense flare.

• Research Organization: Aerospace Corp., El Segundo, CA (USA)
• DOE Contract Number: F04701-80-C-0081
• OSTI ID: 5625647
• Report Number(s): AD-A-093764
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SOLAR FLARES
X RADIATION
ELECTRON DENSITY
X-RAY SPECTRA
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
RADIATIONS
SOLAR ACTIVITY
SPECTRA
640104* - Astrophysics & Cosmology- Solar Phenomena