Accession Number : AD0713112

Title :   VARIATION IN OVII X-RAY LINE EMISSION FROM THE SOLAR CORONA.

Descriptive Note : Rept. for Feb-Jul 70,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Rugge,Hugo R. ; Walker,Arthur B. C. , Jr

Report Date : 15 OCT 1970

Pagination or Media Count : 23

Abstract : The variation in intensity of the solar x-ray resonance intercombination and forbidden lines of helium-like OVII with 2800 MHz solar radio flux is presented for three solar rotations. A high correlation ( r approximately equal to 0.80) exists between the intensities of all three x-ray lines and the 2800 MHz solar flux. The ratio of the forbidden to the intercombination line intensities is found to be essentially independent of long term solar activity. This ratio is used to determine upper limits on the coronal electron density and to make inferences concerning the change in density with solar activity. (Author)

Descriptors :   (*SOLAR CORONA, ELECTRON DENSITY), (*SOLAR SPECTRUM, X RAYS), LINE SPECTRA, SELECTION RULES(PHYSICS), INTENSITY

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE