第23周不同角宽CME的分布及与太阳黑子数位相的比较

统计分析了1996-2008年期间CME数量随角宽的分布, 将几个典型角宽的CME数量随时间变化的特征与太阳黑子数随时间变化特征进行比较. 分析结果表明, 角宽为0°～ 180°的CME占CME总数的95%以上, 全晕CME占2.83%, 角宽301°～ 359°的CME数量非常少. 角宽0° ～ 60°的CME有三个峰值, 与太阳黑子数随时间变化的特征不吻合. 角宽为121°～ 180°CME的数量无双峰分布. 全晕CME的分布具有明显的双峰结构, 第一个峰值出现在2001年, 第二个峰值出现在2005年, 与太阳黑子数的变化不同步.

Distribution of CMEs in Different Angular Width and Its Relationship With the Phase of Sunspot Numbers in Solar Cycle 23

In this paper we statistically analyzed the distribution of the numbers of CME with different angle width during the period of 1996-2008. Then we obtained the relationship between the number of CME with some typical angle width varying with time and that the sunspot numbers varying with time. The analytical results indicate that the numbers of CME within angle width 0° ～ 180° make up 95%, full-halo CMEs make up 2.83%, and the quantities of CME within angle width 301° ～ 359° make up very little proportion of all CMEs. The CMEs of angle width 0° ～ 60° have three peaks, which doesn't match the characteristics of sunspot numbers varying with time. There is no two-peak distribution of the numbers of CME within angle width 121° ～ 180°. Moreover, the distribution of full-halo CMEs has a typical two-peak structure, with the first peak appearing in 2001 and the second peak appearing in 2005, which is not synchronized with the distribution of sunspot numbers.