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arXiv 2205.05908astro-ph.SRastro-ph.IMphysics.space-ph
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CME在不同季节发生率的时空变化

The Temporal and Spatial Behaviors of CME Occurrence Rate at Different Latitudes

Jiaqi Lin, Feng Wang, Linhua Deng, Hui Deng, Ying Mei, Yangfan Xie

摘要:

日冕物质抛射(CME)的统计研究是太阳物理学中的一个热点。为了进一步揭示CME在不同纬度和高度的时空行为,我们分析了CME发生率、日冕亮度指数(CBI)和10.7厘米太阳射电通量(F10.7)之间的相关性和相位关系。我们发现,CME的发生率与CBI的相关性在高纬度(>=60)比在低纬度(<=50)相对较强。在低纬地区,CME的发生率与CBI的相关性比F10.7弱。太阳活动24周(SC 24)CME、F10.7和CBI之间的相关关系比太阳活动23周(SC 23)强。在SC23期间,高纬度CME发生率滞后于F10.7三个月,在SC24期间,低纬度CME发生率导致低纬度CBI一个月。当从CMEs星表的样品中除去非常微弱的CMEs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进行的。不同指标之间的时间偏移可以帮助我们更好地理解负责日地相互作用的物理过程。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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