太阳射电爆发中Spike辐射的准周期振荡

本文介绍了在1981年5月16日微波大爆发中毫秒级时间轮廓Spike辐射中发生的准周期振荡现象。这种准周期振荡可能与日面活动区磁杯中的阿尔芬波运动有关,由此我们可以得到爆发源区一些基本物理条件。最后对于准周期振荡现象对Spike辐射的作用和影响作了简单的讨论。

THE QUASI-PERIODIC OSCILLATION OF SPIKE RADIATION OCCURRED IN SOLAR RADIO BURST

In this paper some rapid quasi-periodic oscillations in the millisecond spike radiationoccurred on May 16, 1981, are discussed. The quasi-period of the oscillation is about 1.5second, and the time profile of its autocorrelation function is about 0.2 second. Such anoscillation might be associated with Alven wave that traverses the magnetic loop of the lowercorona. Some coronal conditions such as the speed of the Alven wave, the radius of themagnetic loop and the plasma density are deduced. The results are in good agreement with those by other observers and theoretical nalysis.