Abstract

Based on the data obtained with the CHIMERA algorithm, we consider the evolution of a long-lived low-latitude coronal hole during its central meridian passage over the period from February 15, 2012, to October 14, 2012. The correlation coefficient between the photospheric magnetic field strength of the coronal hole and its area in nine Carrington rotations is \(R={-}0.55\). It differs noticeably from \(R={-}0.82\) given in Heinemann et al. The results suggest a significant dependence of the area of coronal holes on the method of determining their boundaries. This can have a noticeable effect both on the prediction of geomagnetic activity and on the understanding of the nature of solar phenomena related to these structures.

中文翻译：

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低纬度日冕孔的磁场与其面积的关系

摘要

根据使用CHIMERA算法获得的数据，我们考虑了2012年2月15日至2012年10月14日期间长寿命低纬度日冕孔在其中央子午线通道中的演变。光球之间的相关系数卡林顿旋转9次后，冠孔及其区域的磁场强度为\（R = {-} 0.55 \）。它与Heinemann等人给出的\（R = {-} 0.82 \）明显不同。结果表明，冠状孔的面积在确定其边界的方法上有很大的依赖性。这对地磁活动的预测以及对与这些结构有关的太阳现象的性质的理解都可以产生明显的影响。