太阳射电米波准周期振荡事件分析  

Analysis of the Quasi-periodically Oscillatory Event of Solar Radio Metric Wave

作　　者：马媛[1,2] 郑向明[1,2] 黄光力[3,2] 

机构地区：[1]中国科学院云南天文台,云南昆明650011 [2]中国科学院国家天文观测中心,北京100012 [3]中国科学院紫金山天文台,江苏南京210008

出　　处：《云南天文台台刊》1999年第3期10-16,共7页Publications of the Yunnan Observatoty

摘　　要：对云南天文台高分辨率频谱仪在２２ 周峰年期间观测到的米波准周期振荡事件， 与光学活动及相关事件作了统计分析，s Some significant results are obtained from the statistic analysis of the metric wave oscillatory events , optic activities and correlative events, recorded with the acousto-optic spectrograph at the Yunnan Observatory during Solar Cycle of 22. It is believed that the events are possibly a new type of bursts at metric wavelength. From their morphologies and chracteristics it can be considered that the first sort of the events may be caused by the non—linear longitudinal self-modulation instability produced during the propagation of the lower frequency electromagnetic waves in the corona and the other two events may stem from the periodicity of the high energy released at the inital period of the flare that causes the accelerated energetic electrons.The injection of the high energy electron periodicity into the radio radiation source region makes the radiative events as the periodic pulsation, and the Langmuir wave produced by the plasma is stimulated by the electronic beams in the electromagnetic wave.

关 键 词：太阳射电米波 准周期振荡事件 日冕 太阳活动 

分 类 号：P162.1[天文地球—天文学] P182.9