Elementary loop structures in the solar corona analyzed from TRACE triple-filter images
Elementary loop structures in the solar corona analyzed from TRACE triple-filter images
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DOI：
10.1086/452630
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发表时间：
2005-11-01
影响因子：
4.9
通讯作者：
Nightingale, RW
中科院分区：
文献类型：
--
作者：
Aschwanden, MJ;Nightingale, RW
这项研究首次对冕环的多线程结构进行了定量分析。我们分析了一组用171、195和284埃波长的踪迹三滤波图像观察到的234条细环线。利用同空间高斯函数和线性背景函数的叠加，在所有三个滤光片中同时正演了横截面通量分布。对于每个截面，我们拟合出一般的多温差分发射测量(DEM)分布，以及单温或等温DEM的特殊情况。我们在大约18,000个循环位置执行这些正向拟合，并发现这个几何模型可以在大约3500个案例中拟合(在一个卡红范围内
This study represents the first quantitative analysis of the multithread structure of coronal loops. We analyzed a set of 234 fine loop threads observed with TRACE triple-filter images at wavelengths of 171, 195, and 284 angstrom. The cross-sectional flux profiles are simultaneously forward fitted in all three filters with the superposition of a cospatial Gaussian and linear background functions. We fit a general multitemperature differential emission measure (DEM) distribution to each cross section, aswell as the special case of a single-temperature or isothermal DEM. We perform these forward fits at approximate to 18,000 loop positions and find that this geometric model could be fitted in approximate to 3500 cases (within a chi red