论文标题
从太空观察太阳能F-Corona
Observations of the Solar F-corona from Space
论文作者
论文摘要
审查了太阳能F-Corona的观察结果，强调了Lasco-C2和C3 Coronagraph所实现的25年的连续监测。我们的作品包括克莱门汀相机获得的图像，以及立体声/secchi/hi-1a和PSP/WISPR Heliospheric成像器。沿赤道和极性方向的特征辐射轮廓遵循5°-50°延长范围的功率定律，恒定功率指数为-2.33和-2.55。这两个轮廓都与黄道带光的相应标准曲线非常好。 LASCO赤道剖面表现出肩膀，这意味着10RSUN内的辐射降低了17％，这可能是通过0.3 AU中有机材料消失来解释的。 LASCO首次检测到F-Corona的世俗变化，在LASCO-C3 FOV中以每年0.46％的速度增长。这很可能是碰撞内部黄道云中作用的第一个观察证据。 C2和C3图像的复合材料产生了F-Corona辐射的LASCO参考图，从2到30RSUN，并通过与地面测量结果结合使用，Lasco将LASCO从1到6个RSUN扩展。内部黄道云的对称性平面强烈扭曲，其倾向朝着内行星的平面及其最终太阳赤道的平面增加。相反，发现其上升节点的经度恒定且等于87.6°。 LASCO未检测到任何小规模的结构，例如在太阳能日食期间偶尔报告的假定环。耗尽区的外部边界在19rsun开始受到升华的影响，在19rsun上开始受到升华的影响。该区域延伸至5RSUN，从而定义了无尘区域的边界，在该区域中，最难治性的材料（可能中度吸收的硅酸盐）消失了。
The observations of the solar F-corona from space are reviewed emphasizing the 25 years of continuous monitoring achieved by the LASCO-C2 and C3 coronagraphs. Our work includes images obtained by the Clementine cameras, and the STEREO/SECCHI/HI-1A and PSP/WISPR heliospheric imagers. The characteristic radiance profiles along the equatorial and polar directions follow power laws in the 5°-50° range of elongation, with constant power exponents of -2.33 and -2.55. Both profiles connect extremely well to the corresponding standard profiles of the zodiacal light. The LASCO equatorial profile exhibits a shoulder implying a 17% decrease of the radiance within 10Rsun that may be explained by the disappearance of organic materials within 0.3 AU. LASCO detected for the first time a secular variation of the F-corona, an increase at a rate of 0.46% per year of the integrated radiance in the LASCO-C3 FoV. This is likely the first observational evidence of the role of collisions in the inner zodiacal cloud. A composite of C2 and C3 images produced the LASCO reference map of the radiance of the F-corona from 2 to 30Rsun and, by combining with ground-based measurements, the LASCO extended map from 1 to 6 Rsun. The plane of symmetry of the inner zodiacal cloud is strongly warped, its inclination increasing towards the planes of the inner planets and ultimately the solar equator. In contrast, its longitude of ascending node is found to be constant and equal to 87.6°. LASCO did not detect any small-scale structures such as putative rings occasionally reported during solar eclipses. The outer border of the depletion zone where interplanetary dust particles start to be affected by sublimation appears well constrained at 19Rsun. This zone extends down to 5Rsun, thus defining the boundary of the dust-free zone where the most refractory materials, likely moderately absorbing silicates, disappear.
