Center-to-limb variation of the enigmatic NaI D1 and D2 polarization profiles

被引：0
|
作者：
Stenflo, JO [1 ]
Gandorfer, A
Keller, CU
机构：
[1] ETH Zentrum, Inst Astron, CH-8092 Zurich, Switzerland
[2] Natl Solar Observ, Tucson, AZ 85726 USA
来源：
ASTRONOMY & ASTROPHYSICS | 2000年 / 355卷 / 02期
关键词：
polarization; scattering; Sun : magnetic fields; atomic processes; techniques : polarimetric;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The remarkable polarization structure of the Na I D(1) and D(2) lines that is due to coherent scattering has remained an enigma, since it has not yet been possible to find an explanation that is consistent with both current understanding of quantum mechanics and the astrophysical properties of the Sun's atmosphere. To guide future theoretical efforts we have here explored the detailed center-to-limb variation of the linearly polarized profiles in non-magnetic regions. In particular we find that the unexplained narrow polarization peaks in the Doppler cores of the two lines become even more pronounced with respect to the relative profile shape as we move away from the limb towards the center of the solar disk.
引用
收藏
页码：781 / 788
页数：8
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