Three-Dimensional Reconstruction of Active Regions
Three-Dimensional Reconstruction of Active Regions
复制标题
活动区域的三维重建
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
M. Mierla
中科院分区：
文献类型：
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作者：
L. Rodriguez;A. Zhukov;S. Gissot;M. Mierla
STEREO任务为重建太阳特征的三维结构提供了前所未有的机会。在这项工作中，我们通过局部相关跟踪方法结合了来自两个航天器的SECCHI/EUVI数据。该技术允许自动（无需用户干预）匹配两个图像中的像素。然后使用这些信息对每个像素的3D坐标进行三角测量。我们使用该方法来重建和分析活动区域的三维结构。特别是，我们专注于提取在171,195和284 Å通带几乎同时观测到的日冕环高度。我们比较了不同波长环路的性质，并提取了有关其几何形状的有价值的信息。特别是，我们证明了在171 Å和195 Å图像中看起来共空间的一些循环实际上具有不同的高度，因此占用不同的体积。我们的结果对日冕环的多波长研究具有重要意义，特别是对使用滤波比技术的计算。
The STEREO mission provides an unprecedented opportunity to reconstruct the 3D configuration of solar features. In this work, we combine SECCHI/EUVI data from both spacecraft by means of a local correlation tracking method. The technique allows an automatic (without user intervention) matching of pixels in both images. This information is then used to triangulate the 3D coordinates of each pixel. We use the method in order to reconstruct and analyze the 3D structure of active regions. In particular, we focus on the extraction of coronal loop heights, observed nearly simultaneously in the 171, 195 and 284 Å passbands. We compare the properties of loops in the different wavelengths and extract valuable information regarding their geometry. In particular, we demonstrate that some loops that look co-spatial in the 171 Å and 195 Å images have in fact different heights and thus occupy different volumes. Our results have important implications for multi-wavelength studies of coronal loops, especially for calculations using filter-ratio techniques.