Correlations Between CME Parameters and Sunspot Activity

	Correlations Between CME Parameters and Sunspot Activity
	Du, Zhanle
刊名	SOLAR PHYSICS
	2012-05-01
卷号	278 期号:1 页码:203-215
关键词	Coronal mass ejections (CMEs) Solar cycle Sunspots Time variations, secular and long term
英文摘要	Smoothed monthly mean coronal mass ejection (CME) parameters (speed, acceleration, central position angle, angular width, mass, and kinetic energy) for Cycle 23 are cross-analyzed, showing that there is a high correlation between most of them. The CME acceleration (a) is highly correlated with the reciprocal of its mass (M), with a correlation coefficient r = 0.899. The force (Ma) to drive a CME is found to be well anti-correlated with the sunspot number (R-z), r = -0.750. The relationships between CME parameters and R-z can be well described by an integral response model with a decay time scale of about 11 months. The correlation coefficients of CME parameters with the reconstructed series based on this model ((r) over bar (f1) = 0.886) are higher than the linear correlation coefficients of the parameters with R-z ((r) over bar (0) = 0.830). If a double decay integral response model is used (with two decay time scales of about 6 and 60 months), the correlations between CME parameters and R-z improve ((r) over bar (f2) = 0.906). The time delays between CME parameters with respect to R-z are also well predicted by this model (19/22 = 86%); the average time delays are 19 months for the reconstructed and 22 months for the original time series. The model implies that CMEs are related to the accumulation of solar magnetic energy. These relationships can help in understanding the mechanisms at work during the solar cycle.
收录类别	SCI
语种	英语
WOS记录号	WOS:000303395600012
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6281]
专题	国家天文台_太阳物理研究部
作者单位	Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Du, Zhanle. Correlations Between CME Parameters and Sunspot Activity[J]. SOLAR PHYSICS,2012,278(1):203-215.
APA	Du, Zhanle.(2012).Correlations Between CME Parameters and Sunspot Activity.SOLAR PHYSICS,278(1),203-215.
MLA	Du, Zhanle."Correlations Between CME Parameters and Sunspot Activity".SOLAR PHYSICS 278.1(2012):203-215.