摘要
本文统计分析了国家天文台5.2～7.6GHz频段高时间分辨率频谱仪23周太阳活动峰年期间(1999.8～2002.1)观测到的87个Ⅲ型爆发,对这些事件的频率漂移、半功率持续时间、带宽和偏振及相关事件作了详细分析。认为这些Ⅲ型爆发可能是由非热电子束引起的谐波等离子体辐射和电子回旋脉泽辐射而产生。
87 groups of type Ⅲ bursts recorded with the dynamic spectrograph (from 5.7 to 7.6GHz) during the 23^(rd) solar cycle (from August 1999 to January 2002) at the National Astronomical Observatories are statistically analysed in this article,especially with the frequency drift,duration,bandwidth and polarization of each of these events being analysed in detail.From the observational characteristics the authors hold that the microwave type Ⅲ bursts may be caused by the harmonic plasma radiation nonthermal electronic beams and the electron gyro-maser radiation.
出处
《天文研究与技术》
CSCD
北大核心
2004年第2期84-91,共8页
Astronomical Research & Technology
