论文标题
与太阳能肢体上的冠状质量弹出相关的冠状凹痕
Coronal dimmings associated with coronal mass ejections on the solar limb
论文作者
论文摘要
我们介绍了43个冠状动脉调查事件的统计分析，该事件与SDO和立体声卫星的准季度期间发生的地球定向的CME有关。我们研究了立体/euvi在肢体上方观察到的冠状凹痕，并将其性质与相关CME的质量和速度进行了比较。卫星的独特位置使我们能够将我们的发现与Dissauer等人的结果进行比较。 （2018b，2019年），研究了SDO/AIA对太阳能磁盘观察到的相同事件。此类统计数据是第一次完成，并确认冠状斑点和CME参数的关系对于LIMB观点。来自不同视线的调度区域的观察结果表明，总EUV强度相似（$ c = 0.60 \ pm0.14 $）。 We find that the (projected) dimming areas are typically larger for off-limb observations (mean value of $1.24\pm1.23\times10^{11}$ km$^2$ against $3.51\pm0.71\times10^{10}$ km$^2$ for on-disk), with a correlation of $c=0.63\pm0.10$.这种系统的差异可以通过对电晕中较高的调光区的（较弱）贡献来解释，这在盘中观测中无法检测到。 LIMB调度区域和亮度与CME质量的相关性非常强（$ c = 0.82 \ pm0.06 $，$ c = 0.75 \ pm0.08 $），而调度区域和亮度变化率与CME速度相关（$ C \ sim0.6 $）。我们的发现表明，对于L1和L5处的卫星位置，冠状斑块有潜力提供与太空天气预测相关的地球定向CME的质量和速度的早期估计。
We present a statistical analysis of 43 coronal dimming events, associated with Earth-directed CMEs that occurred during the period of quasi-quadrature of the SDO and STEREO satellites. We studied coronal dimmings that were observed above the limb by STEREO/EUVI and compared their properties with the mass and speed of the associated CMEs. The unique position of satellites allowed us to compare our findings with the results from Dissauer et al. (2018b, 2019), who studied the same events observed against the solar disk by SDO/AIA. Such statistics is done for the first time and confirms the relation of coronal dimmings and CME parameters for the off-limb viewpoint. The observations of dimming regions from different lines-of-sight reveal a similar decrease in the total EUV intensity ($c=0.60\pm0.14$). We find that the (projected) dimming areas are typically larger for off-limb observations (mean value of $1.24\pm1.23\times10^{11}$ km$^2$ against $3.51\pm0.71\times10^{10}$ km$^2$ for on-disk), with a correlation of $c=0.63\pm0.10$. This systematic difference can be explained by the (weaker) contributions to the dimming regions higher up in the corona, that cannot be detected in the on-disk observations. The off-limb dimming areas and brightnesses show very strong correlations with the CME mass ($c=0.82\pm0.06$ and $c=0.75\pm0.08$), whereas the dimming area and brightness change rate correlate with the CME speed ($c\sim0.6$). Our findings suggest that coronal dimmings have the potential to provide early estimates of mass and speed of Earth-directed CMEs, relevant for space weather forecasts, for satellite locations both at L1 and L5.
