论文标题
汤姆森（Thomson）散射在太阳活动区域上方和临时极化校正方法
Thomson scattering above solar active regions and an ad-hoc polarization correction method for the emissive corona
论文作者
论文摘要
汤森散射的光闪光是在光波长处观察到的下limb的下部太阳电晕连续体的主要组成部分。它被称为K-Corona，也是线性两极化的。我们研究了使用K-Corona的A先验极化特性以及偏振发射线的可能性，以测量和纠正仪器诱导的极化串扰。首先，我们得出了不可还原的球形张量形式主义中未极光光的汤森散射的stokes参数。这允许向前合成汤姆森散射信号，以实现入射辐射场中对称性特征更复杂的情况，这可能会限制我们提出的技术的准确性。为此，我们利用高级的3D辐射磁流体动力冠状动脉模型。在Fe XIII 10746 Angstrom发射线中的合成极化信号一起，我们发现在非偏度光学系统的假设下，可以对望远镜和仪器诱导的极化串扰进行临时校正。
Thomson scattered photospheric light is the dominant constituent of the lower solar corona's spectral continuum viewed off-limb at optical wavelengths. Known as the K-corona, it is also linearly polarized. We investigate the possibility of using the a priori polarized characteristics of the K-corona, together with polarized emission lines, to measure and correct instrument-induced polarized crosstalk. First, we derive the Stokes parameters of Thomson scattering of unpolarized light in an irreducible spherical tensor formalism. This allows forward synthesis of the Thomson scattered signal for the more complex scenario of symmetry-breaking features in the incident radiation field, which could limit the accuracy of our proposed technique. For this, we make use of an advanced 3D radiative magnetohydrodynamic coronal model. Together with synthesized polarized signals in the Fe XIII 10746 Angstrom emission line, we find that an ad hoc correction of telescope and instrument-induced polarization crosstalk is possible under the assumption of a non-depolarizing optical system.
