Three-Dimensional Electron Density from Tomographic Analysis of LASCO-C2 Images of the K-Corona Total Brightness

被引:24
|
作者
Frazin, Richard A. [1 ]
Lamy, Philippe [2 ]
Llebaria, Antoine [2 ]
Vasquez, Alberto M. [3 ]
机构
[1] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA
[2] Univ Aix Marseille 1, Lab Astrophys Marseille, CNRS, F-13388 Marseille 13, France
[3] Univ Buenos Aires, Inst Astron & Fis Espacio, CONICET, Buenos Aires, DF, Argentina
基金
美国国家航空航天局;
关键词
Solar corona; Tomography; Electron density; Thomson scattering; WHITE-LIGHT IMAGES; SOLAR CORONA; OBJECTS; RECONSTRUCTION; INVERSION;
D O I
10.1007/s11207-010-9557-9
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the first quantitative three-dimensional (3D) tomographic reconstructions of electron density from coronagraph measurements of the K-corona's total brightness (B) made by LASCO-C2 on SOHO. This is possible because new calibrations of the LASCO-C2 images in both polarized brightness (pB) and B have now been made for the entire mission. The B and pB reconstructions are compared, and the differences are explained in terms of line of sight weighting functions in Thomson scattering. We conclude that the LASCO-C2 B archive, which is vastly larger than the pB archive, will be a very valuable resource for determining the 3D electron density throughout the SOHO mission which started taking data in 1996.
引用
收藏
页码:19 / 30
页数:12
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