论文标题
2022年5月月食的光学极化
Optical Polarimetry of the May 2022 Lunar Eclipse
论文作者
论文摘要
在月食期间，从月球中反射出的阳光已经通过地球大气层传播到月球的途中。在该传播过程中，多个散射和不均匀大气特征的结合可以使光线极化。从传播系外行星的大气中也可以观察到类似（尽管要小得多）的效果。我们介绍了在2022年5月16日的月球月食的前15分钟内进行极化观测结果。我们发现BB中的极化程度为2.1 +/- 0.4％，V，V，V，0.5 +/- 0.5 +/- 0.5 +/- 0.5 +/- 0.5 +/- 0.2％在R和0.2 +/- 0.2 +/- 0.2 +/- 0.2 +/- 0.2 +/- 0.2中的范围内，这些范围内的范围均在范围内占据范围。两极分化可能会因事件而变化。我们发现，由于发生率的不同角度，我们发现深色母马和附近的明亮高地或附近的明亮山地区域或靠近磁盘中心的区域之间没有显着的极化差异（<0.02％）。这进一步增强了对极化的起源的解释，这是由于地球大气中的散射而不是月球岩石所致。
The sunlight reflected from the Moon during a total lunar eclipse has been transmitted through the Earth's atmosphere on the way to the Moon. The combination of multiple scattering and inhomogeneous atmospheric characteristics during that transmission can potentially polarize that light. A similar (although much smaller) effect should also be observable from the atmosphere of a transiting exoplanet. We present the results of polarization observations during the first 15 minutes of totality of the lunar eclipse of 2022 May 16. We find degrees of polarization of 2.1 +/- 0.4 per cent in B, 1.2 +/- 0.3 per cent in V, 0.5 +/- 0.2 per cent in R and 0.2 +/- 0.2 per cent in I. Our polarization values lie in the middle of the range of those reported for previous eclipses, providing further evidence that the induced polarization can change from event to event. We found no significant polarization difference (<0.02 per cent) between a region of dark Mare and nearby bright uplands or between the lunar limb and regions closer to the disk centre due to the different angle of incidence. This further strengthens the interpretation of the polarization's origin being due to scattering in the Earth's atmosphere rather than by the lunar regolith.
