Horizontal and Vertical Flow Structure in Emerging Flux Regions
Horizontal and Vertical Flow Structure in Emerging Flux Regions
复制标题
新兴通量区域的水平和垂直流结构
DOI：
10.1093/pasj/58.2.407
复制
发表时间：
2006
影响因子：
2.3
通讯作者：
T. Berger
中科院分区：
文献类型：
--
作者：
H. Kozu;R. Kitai;D. Brooks;H. Kurokawa;K. Yoshimura;T. Berger
为了全面了解出射通量区对流气体的流动结构，我们对NOAA 8218和NOAA 10774两个太阳活动区的三个出射通量区进行了研究。利用局部相关跟踪方法，我们发现了几个水平发散的流动结构，这是稳定的一个小时内，在NOAA 8218的2个EFR。水平流速约为500 ms −1，结构半径约为4 Mm。我们用光谱方法分析了NOAA 10774的另一个数据集，发现在EFR的中心部分有暂时稳定的向上气流。视线速度约为150 ms −1，流斑的半径为2至5 Mm。这些结果支持了我们以前的研究结果，对流细胞样流出现在EFR的中央部分。根据这些结果，我们估计EFR中流动池的深度约为600 km，并且池的翻转时间约为2小时。
In order to obtain an overall view of the flow structure of convective gas in emerging flux regions (EFRs), we studied three EFRs in two solar active regions, NOAA 8218 and NOAA 10774. Using the Local Correlation Tracking method, we found several horizontally divergent flow structures, which were stable over a period of 1 hour, in 2 EFRs in NOAA 8218. The horizontal flow velocities and the sizes of the structures were around 500ms−1 and about 4Mm in radius, respectively. We analyzed another dataset of NOAA 10774 using spectroscopic methods and found temporarily stable up-ward gas flows in the central part of the EFR. The line-of-sight velocities were around 150ms−1 and the size of the flow patch was 2 to 5Mm in radius. These results support our previous findings that convective-cell-like flow appears in the central part of an EFR. We estimated from these results that the depth of the flow cell in EFRs is about 600 km, and the turn-over time of the cell is about 2 hours.