Dynamics and structure of supergranulation
Dynamics and structure of supergranulation
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DOI：
10.1023/b:sola.0000033363.15641.8f
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发表时间：
2004-05-01
期刊：
影响因子：
2.8
通讯作者：
Kosovichev, AG
中科院分区：
文献类型：
--
作者：
Del Moro, D;Berrilli, F;Kosovichev, AG
本文研究了太阳超颗粒特征的时间演化和几何性质。为此，我们应用自动功能跟踪算法的6天的时间序列的18个近地表流图（杜瓦尔和Gizon，2000年）包含548个目标对象。生命期是通过测量每个目标的出生和死亡之间的时间来计算的。使用指数拟合的寿命分布的单个超颗粒，我们得出的平均寿命为22小时。基于分段数值方法的应用，我们估计了超颗粒细胞的面积分布等特征几何参数。我们还导出了超颗粒的测量寿命和面积之间的关系。
In this paper we investigate the temporal evolution and geometric properties of solar supergranular features. For this purpose we apply an automatic feature-tracking algorithm to a 6-day time series of 18 near-surface flowmaps (Duvall and Gizon, 2000) containing 548 target objects. Lifetimes are calculated by measuring the time elapsing between the birth and death of each target. Using an exponential fit on the lifetime distribution of single supergranules we derived a mean lifetime of 22 hours. Based on the application of segmentation numerical procedures, we estimated characteristic geometric parameters such as area distributions of supergranular cells. We also derive the relationship between measured lifetime and the area of the supergranules.