Abstract

The lifetimes and length-scales for supergranular cells in active and quiescent regions of the solar chromosphere, and the relation between the two, were studied using a time series of Ca II K filtergrams. The lifetimes, in contrast to supergranular length scale and fractal dimension, show no significant dependence on solar latitude, suggesting that cell lifetimes are independent of the differential rotation and a possible supergranular super-rotation. The functional form of the relation was obtained guided by a comparison of the distributions of the two supergranular parameters. We infer a linear dependence of cell lifetime on area, which can be understood by the assumption of the network’s evolution via a diffusion of the magnetic field. Our analysis suggests that the diffusion rate in quiet regions is about 10\(\%\) greater than in active regions.

中文翻译：

---

太阳超颗粒寿命对表面磁活动和旋转的依赖性

摘要

使用 Ca II K 滤波器图的时间序列研究了太阳色球层活动和静止区域中超颗粒细胞的寿命和长度尺度，以及两者之间的关系。与超颗粒长度尺度和分形维数相比，寿命对太阳纬度没有显着依赖性，这表明电池寿命与微分旋转和可能的超颗粒超级旋转无关。通过比较两个超粒参数的分布，获得了该关系的函数形式。我们推断细胞寿命与面积的线性相关性，这可以通过网络通过磁场扩散演化的假设来理解。我们的分析表明，安静区域的扩散速率比活跃区域的扩散速率大约高 10 \(\%\) 。