Type II-IV radio bursts and compact and diffuse white-light clouds in the outer corona of December 14, 1971

Details Type II-IV radio bursts and compact and diffuse white-light clouds in the outer corona of December 14, 1971 Type II-IV radio bursts and compact and diffuse white-light clouds in the outer corona of December 14, 1971

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...48..339k&link_type=abstract

Solar Physics, vol. 48, June 1976, p. 339-356.

Astronomy and Astrophysics

Astronomy

16

Plasma Clouds, Solar Corona, Type 2 Bursts, Type 4 Bursts, H Alpha Line, Magnetohydrodynamics, Radio Astronomy

Scientific paper

Radio and optical observations are analyzed for a flare event in which type II, stationary type IV, and moving type IV radio bursts were jointly associated with a H-alpha spray or eruptive prominence and were followed by several compact moving white-light coronal plasma clouds ahead of an expanding diffuse cloud. Radio-interferometric observations at 160 MHz are compared with both the H-alpha observations and white-light observations of the outer corona. The compact plasma clouds are shown to be the optical counterparts of the moving-type-IV radio sources, suggesting that magnetic bubbles were produced during the flare process itself. It is found that the outward motion of the diffuse cloud apparently caused the flare-associated interplanetary shock, that the main type II shock was probably a blast-type MHD shock and had no direct relation to the expansion of the diffuse cloud, and that the type II and moving type IV bursts were relatively independent of the dominant mass-ejection process.

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