Imaging-polarimetric properties of the white-light inner corona during the 2017 total solar eclipse
文献类型:期刊论文
作者 | Liang Y(梁昱)1,2; Qu ZQ(屈中权)2,3; Hao, Lei1; Xu Z(徐稚)2; Zhong Y(钟悦)2 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
出版日期 | 2022-11-23 |
卷号 | 518期号:2页码:1776-1788 |
ISSN号 | 0035-8711 |
关键词 | techniques polarimetric - Sun corona - Sun magnetic fields |
DOI | 10.1093/mnras/stac3183 |
产权排序 | 第2完成单位 |
文献子类 | Article |
英文摘要 | We carried out the polarimetric observation of the white-light inner corona during the 2017 total solar eclipse in the United States. Degree of linear polarization (DLP) of the inner corona is obtained by the modulated polarized data. The electron density is inferred from the normalized white-light polarization brightness data. According to the observational results, we find that: (1) The DLP of the white-light corona increases with the height, peaking at approximately $1.3 \sim 1.35\, {\rm R}_{\odot }$ and then slightly decreases. In the coronal streamer region, DLP peaks at approximately 1.35 R-& ODOT; and its value is about 40 per cent, whereas in the coronal hole region, DLP peaks at approximately 1.3 R-& ODOT; and its value is about 35 per cent. (2) The azimuth angle of polarization sin (2 chi) is symmetrical around the solar disk center. It can be easily found that the gradients of the angle of polarization, representing the direction of oscillations of the electric vector E, are tangential. Above the active region, the DLP distribution changes significantly, whereas the azimuth distribution is stable. This proves that the polarization of white-light corona is mainly caused by scattering polarization. (3) The electron density and the K-corona have similar distributions of properties. Electron density decreases from 6 x 10(7)cm(-3) to 2 x 10(6)cm(-3), whereas the height increases from $1.1\, {\rm R}_{\odot }$ to $1.85\, {\rm R}_{\odot }$. (4) An interesting finding is that, in the cavity region, there may be other polarization-induced mechanisms besides scattering, which can affect the value of the white-light DLP. |
学科主题 | 天文学 ; 太阳与太阳系 ; 太阳物理学 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
WOS关键词 | ELECTRON-DENSITY ; MAGNETIC-FIELD ; PHYSICAL-PROPERTIES ; F-CORONA ; POLARIZATION ; DYNAMICS ; INVERSION ; MISSION ; IMAGES ; LINE |
资助项目 | National Natural Science Foundation of China ; [12003066] ; [11527804] ; [U1931206] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000893276800008 |
资助机构 | National Natural Science Foundation of China ; [12003066] ; [11527804] ; [U1931206] |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25694] |
专题 | 云南天文台_光纤阵列太阳光学望远镜研究组 |
通讯作者 | Liang Y(梁昱) |
作者单位 | 1.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China; 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China |
推荐引用方式 GB/T 7714 | Liang Y,Qu ZQ,Hao, Lei,et al. Imaging-polarimetric properties of the white-light inner corona during the 2017 total solar eclipse[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2022,518(2):1776-1788. |
APA | Liang Y,Qu ZQ,Hao, Lei,Xu Z,&Zhong Y.(2022).Imaging-polarimetric properties of the white-light inner corona during the 2017 total solar eclipse.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,518(2),1776-1788. |
MLA | Liang Y,et al."Imaging-polarimetric properties of the white-light inner corona during the 2017 total solar eclipse".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 518.2(2022):1776-1788. |
入库方式: OAI收割
来源:云南天文台
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