Fine structures in solar radio bursts at a 21 cm wavelength and pulsation modulation

✍ Scribed by Qi-Jun Fu; Yuan-Fang Gong; Sheng-Zhen Jin; Ren-Yang Zhao

• Publisher: Springer
• Year: 1990
• Tongue: English
• Weight: 597 KB
• Volume: 130
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00156787

✦ Synopsis

The solar burst of 13 July, 1986 at 2I cm wavelength was recorded with a time constant of 8 ms. In the course of the burst lasting for about 40 min there appeared distinct stages of the burst's evolution. They consisted of the pattern of energy release in flares which was proposed by Sturrock et al. (1984). There were pulsations with periodicities of 0.178 and 4 s superimposed on the flux density. The pulsations were quasiperiodical with features of almost unchanged mean periods. The relative amplitude of the pulsation modulation changed with the phase of the burst; in general, it reached 10-20% in the rising phase. The possible mechanisms of pulsations are discussed and some plasma parameters of oscillation sources are deduced.