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On some statistical characteristics of radio-rich CMEs in the solar cycles 23 and 24

机译:关于太阳周期23和24中富含无线电的CME的一些统计特征

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In this paper we have presented the properties of radio-rich coronal mass ejections (CMEs), during the period 1997–2013. The CME event accompanied by the type II radio burst is referred to as radio-loud (RL), while the one lacking a type II burst is termed radio-quiet (RQ). These radio rich CMEs produce type II (1–14MHz), i.e. decametric–hectometric or DH radio burst. It is found that the average width of all DH CMEs during the study period is 235° and 75% of the DH CMEs are halo CMEs in solar cycle 24. The DH CMEs linear speeds distribution is in the range 112–3387km/s, with an average speed of 1043km/s; the acceleration varies between 434m/s2and ?179m/s2. About 62% of the DH CMEs are decelerated. A CME associated with a type II burst and originating close to the center of the solar disk typically results in a shock at Earth in 2–3days and hence can be used to predict shock arrival at Earth.
机译:在本文中,我们介绍了1997-2013年期间富含无线电的日冕物质抛射(CME)的特性。伴随II型无线电突发的CME事件被称为无线电响(RL),而缺乏II型突发的CME事件被称为无线电安静(RQ)。这些富含无线电的CME产生II型(1–14MHz),即十公尺至十公尺或DH无线电突发。结果发现,在研究期间,所有DH CME的平均宽度为235°,并且在太阳周期24中75%的DH CME为晕环CME。DHCME的线速度分布范围为112–3387km / s,平均速度为1043km / s;加速度在434m / s2和179m / s2之间变化。大约62%的DH CME减速。与II型爆发有关的CME通常起源于太阳盘中心附近,通常会在2-3天内对地球造成电击,因此可以用来预测电击到达地球的时间。

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