Kavli Affiliate: Feng Wang
| First 5 Authors: Jiaqi Lin, Feng Wang, Linhua Deng, Hui Deng, Ying Mei
| Summary:
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.
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