The Temporal and Spatial Behaviors of CME Occurrence Rate at Different Latitudes
The Temporal and Spatial Behaviors of CME Occurrence Rate at Different Latitudes
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不同纬度日冕物质抛射发生率的时空行为
DOI：
10.3847/1538-4357/ac6f54
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Xie Yangfan
中科院分区：
文献类型：
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作者：
Lin Jiaqi;Wang Feng;Deng Linhua;Deng Hui;Mei Ying;Xie Yangfan
日冕物质抛射(CMES)的统计研究是太阳物理学的一个热点问题。为了进一步揭示日冕物质抛射在不同纬度和高度的时空行为，我们分析了日冕物质抛射出现率、日冕亮度指数(CBI)和10.7厘米太阳射电通量(F10.7)之间的相关和相位关系。我们发现日冕物质抛射的发生率与CBI的相关性在高纬度(>；=60)比在低纬度(<；=50)要强得多。在低纬地区，日冕物质抛射的发生率与CBI的相关性相对弱于F10.7。太阳活动周期24周(SC24)的CME、F10.7和CBI之间的相关关系比太阳周期23周(SC23)强。在SC23期间，高纬CME出现率比F10.7晚3个月，在SC24期间，低纬CME出现率导致低纬CBI滞后1个月。当从CDAW星表的样品中去掉非常微弱的CME时，相关系数值变得更大。根据我们的结果，我们可以推测，高低纬日冕物质抛射的源区高度可能不同，磁能的积累和耗散过程是从太阳低层大气向高层大气的过程。不同指标之间的时间偏移量可以帮助我们更好地理解导致日地相互作用的物理过程。
The statistical study of the Coronal Mass Ejections (CMEs) is a hot topic in solar physics. To further reveal the temporal and spatial behaviors of the CMEs at different latitudes and heights, we analyzed the correlation and phase relationships between the occurrence rate of CMEs, the Coronal Brightness Index (CBI), and the 10.7-cm solar radio flux (F10.7). We found that the occurrence rate of the CMEs correlates with CBI relatively stronger at high latitudes (>=60) than at low latitudes (<=50). At low latitudes, the occurrence rate of the CMEs correlates relatively weaker with CBI than F10.7. There is a relatively stronger correlation relationship between CMEs, F10.7, and CBI during Solar Cycle 24(SC24) than Solar Cycle 23 (SC23). During SC23, the high-latitude CME occurrence rate lags behind F10.7 by three months, and during SC24, the low-latitude CME occurrence rate leads to the low-latitude CBI by one month. The correlation coefficient values turn out to be larger when the very faint CMEsare removed from the samples of the CDAW catalog. Based on our results, we may speculate that the source regions of the high/low-latitude CMEs may vary in height, and the process of magnetic energy accumulation and dissipation is from the lower to the upper atmosphere of the Sun. The temporal offsets between different indicators could help us better understand the physical processes responsible for the solar-terrestrial interactions.