Abstract

The regularities in the formation of coronal holes in the growth phase of cycle 23 are studied. The period from January 1, 1997, to March 1, 2000 (Carrington rotations 1918–2059), is considered in detail. The evolution of the global magnetic field of the Sun from a zonal to a sectorial structure of the field distribution is analyzed. The zonal structure is shown to be quasi-stable. The sum of zonal harmonics dominates until Carrington rotation 1941, although a stable four-sector structure of the global magnetic field is formed in rotation 1932. In Carrington rotations 1941–1950, the contribution of the zonal and sectorial components becomes approximately equal, and, starting with Carrington rotation 1950, the sectorial structure of the global magnetic field is dominant. The sectorial structure undergoes sharp changes, from four-sector at the beginning of the growth of sector harmonics (Carrington rotation 1926) to two-sector, then back to four-sector, and then again to the two-sector structure. Coronal holes unambiguously trace all evolutionary changes in the global magnetic field. The structure of the polarity of the global magnetic field uniquely determines the zones of photospheric magnetic fields in which coronal holes form.

中文翻译：

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第23周期生长阶段冠状孔的形成和演化变化

摘要

研究了周期23的生长期冠状孔形成的规律。详细介绍了从1997年1月1日到2000年3月1日（卡林顿轮流1918-2059）的时期。分析了太阳的整体磁场从区域分布的区域结构向区域结构的演变。区域结构显示为准稳定的。尽管在1932年旋转中形成了稳定的全球磁场四扇区结构，但直到1941年卡林顿旋转时，区域谐波总和才占主导地位。在1941年至1950年卡林顿旋转中，区域分量和扇区分量的贡献变得大致相等，并且，从1950年卡林顿旋转开始，全球磁场的扇形结构占主导地位。部门结构发生了急剧变化，从四倍频起初的扇区谐波（Carrington旋转1926年）增长到二倍频，然后又回到四倍频，再到二倍频结构。日冕孔清楚地描绘了整体磁场中的所有演化变化。整体磁场的极性的结构唯一地确定其中冠状孔形成的光球磁场的区域。