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首页> 外文期刊>The Astrophysical journal >May Day! Coronal Loop Temperatures From The Hin0de Euv Imaging Spectrometer
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May Day! Coronal Loop Temperatures From The Hin0de Euv Imaging Spectrometer

机译：劳动节！ Hin0de Euv成像光谱仪的冕环温度

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Data from the EUV Imaging Spectrometer on Hinode taken on 2007 May 1 (May Day) are used to investigate the thermal properties of a coronal loop in AR 10953. For background subtraction, we have taken cuts across the loop near the apex and the footpoint where the background is relatively simple. Three density-sensitive line ratios give statistically different answers, and emission measure loci plots indicate that the loop plasma in not isothermal. Therefore, we have done differential emission measure analysis on these data and found a two-component model that can reproduce the background-subtracted intensities. Since both of these components are broadened, they cannot simply represent two isothermal strands of the EIS loop or two isothermal loops along the line of sight. They could, however, represent either two dominant ensembles of strands for the observed EIS loop or the dominant ensemble of strands for two individual loops along the line of sight. The TRACE image of the active region can help us determine which of these models best describes the data. It shows what appears to be two distinct loops that cross, one behind the other, at the approximate position of our cut near the EIS loop apex. It seemed natural to conclude, therefore, that the two-component DEM distribution represents two ensembles of strands, one for each of the loops seen in the TRACE image.
机译：2007年5月1日（五月天）从Hinode的EUV成像光谱仪获得的数据用于研究AR 10953中日冕环的热学性质。为了进行背景减法，我们在顶点和脚点附近的环上进行了切割背景比较简单。三种密度敏感线比在统计上给出了不同的答案，并且发射测量位点图表明回路等离子体不是等温的。因此，我们对这些数据进行了差分排放量度分析，发现了一个可以重现背景扣除强度的两成分模型。由于这两个组件都加宽了，因此它们不能简单地代表EIS回路的两个等温线或沿视线的两个等温线。但是，它们可以代表观察到的EIS回路的两个主导合股，也可以代表沿视线的两个单独回路的主导合股。活动区域的TRACE图像可以帮助我们确定以下哪个模型最能描述数据。它显示了在EIS环形顶点附近我们切割的大致位置处似乎有两个交叉的环形线圈，一个交叉另一个。因此，得出这样的结论似乎很自然，即两组分DEM分布代表两个股线集合，一个用于TRACE图像中看到的每个环。

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