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ROTATIONAL TOMOGRAPHY OF THE SOLAR CORONA - CALCULATION OF THE ELECTRON DENSITY AND TEMPERATURE

机译:太阳日冕的旋转层析成像-电子密度和温度的计算。

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To know the morphology of the structures appearing in the solar corona is essential to help us understand their physical origin and their behavior. For instance, two types of polar plumes, each having a different geometry could exist : “bright points” plumes and “network” plumes (Gabriel, 2006). The study of plumes morphology and physical properties will probably help us to understand the heating and the acceleration of the fast solar wind. The tomography theory is a powerful mathematical tool which could allow us to reach these goals. Having a number of projections (I.e. images) of the Sun, it is possible under several assumptions to reconstruct its 3 dimensional structure. In this paper, we present our first results on tomographic inversion of the inner solar corona (lower than 1.5 solar radii) with the Inverse Radon Transform, using EIT/SOHOmeasurements. From the inverted intensities, we retrieve the electron density and temperature for each volume element (voxel).
机译:了解太阳日冕中出现的结构的形态对于帮助我们了解它们的物理起源和行为至关重要。例如,可以存在两种类型的极性羽,每种羽具有不同的几何形状:“亮点”羽和“网络”羽(Gabriel,2006)。对羽状形态和物理性质的研究可能会帮助我们了解快速太阳风的加热和加速。层析成像理论是一种强大的数学工具,可以使我们达到这些目标。具有许多太阳的投影(即图像),可以在几种假设下重建其3维结构。在本文中,我们使用EIT / SOHO测量方法,利用反Rad变换,对内部太阳电晕(小于1.5太阳半径)的层析成像反演提出了第一个结果。从反向强度中,我们获取每个体积元素(体素)的电子密度和温度。

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