Study of supergranules
Study of supergranules
复制标题
超颗粒的研究
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
H. Zirin
中科院分区：
文献类型：
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作者：
Haimin Wang;H. Zirin
给出了超颗粒寿命和速度场的详细研究结果。给出了宁静太阳上观测到的下沉气流速度与网络磁通量元素之间的相关性。在排除了磁通量密度≥ 25 G的区域后，我们发现，无论是下沉气流还是上升气流，超颗粒垂直速度的上限都是0.1 km s-1，r.m.s.速度为0.03 km s-1。通过观察单个超颗粒的演化，我们发现超颗粒的平均寿命可能大于50小时。我们描述了超颗粒细胞的形成和衰变的不同方式。新的细胞通常形成在一个区域不包含预先存在的超颗粒速度场。细胞可能以两种方式消失：分裂和消失。
Results of a detailed study on supergranule lifetime and velocity fields are presented. We show the correlation between the observed downdraft velocity and the network magnetic flux elements on the quiet sun. After excluding areas with magnetic flux density ≥ 25 G, we find that the upper limit of the supergranule vertical speed is 0.1 km s−1 for both downdraft and updraft, and the r.m.s. speed is 0.03 km s−1. By observing the evolution of individual supergranules, we find that the average lifetime of supergranules might be ≥ 50 hours. We describe different ways of formation and decay of supergranular cells. New cells usually form in an area containing no pre-existing supergranule velocity fields. Cells may disappear in two ways: fragmentation and fading away.