YNAO OpenIR  > 光纤阵列太阳光学望远镜研究组
Polarization of Coronal Forbidden Lines
Li H(李昊)1,2; Degl'Innocenti, Egidio Landi3; Qu ZQ(屈中权)1
Source PublicationASTROPHYSICAL JOURNAL
2017-03-20
Volume838Issue:1Pages:69-59
DOI10.3847/1538-4357/aa6625
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Corona Magnetic Fields Polarization
Abstract

Since the magnetic field is responsible for most manifestations of solar activity, one of the most challenging problems in solar physics is the diagnostics of solar magnetic fields, particularly in the outer atmosphere. To this end, it is important to develop rigorous diagnostic tools to interpret polarimetric observations in suitable spectral lines. This paper is devoted to analyzing the diagnostic content of linear polarization imaging observations in coronal forbidden lines. Although this technique is restricted to off-limb observations, it represents a significant tool to diagnose the magnetic field structure in the solar corona, where the magnetic field is intrinsically weak and still poorly known. We adopt the quantum theory of polarized line formation developed in the framework of the density matrix formalism, and synthesize images of the emergent linear polarization signal in coronal forbidden lines using potential-field source-surface magnetic field models. The influence of electronic collisions, active regions, and Thomson scattering on the linear polarization of coronal forbidden lines is also examined. It is found that active regions and Thomson scattering are capable of conspicuously influencing the orientation of the linear polarization. These effects have to be carefully taken into account to increase the accuracy of the field diagnostics. We also found that linear polarization observation in suitable lines can give valuable information on the long-term evolution of the magnetic field in the solar corona.

Funding ProjectNASA ; National Science Foundation of China (NSFC)[11373065] ; National Science Foundation of China (NSFC)[11527804] ; National Science Foundation of China (NSFC)[11078005] ; National Science Foundation of China (NSFC)[10943002] ; Natural Scientific Foundation of Yunnan province[2010CD113] ; Chinese Academy of Sciences President's International Fellowship Initiative[2016VMA056]
Funding OrganizationNASA ; National Science Foundation of China (NSFC)[11373065, 11527804, 11078005] ; National Science Foundation of China (NSFC)[10943002] ; Natural Scientific Foundation of Yunnan province[2010CD113] ; Chinese Academy of Sciences President's International Fellowship Initiative[2016VMA056]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
Archive Date2017-04-25
WOS IDWOS:000397896600002
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordVECTOR MAGNETIC-FIELDS ; EMISSION-LINE ; SOLAR CORONA ; SPECTRAL-LINES ; FE-XIV ; POLAR-REGION ; STATISTICAL EQUILIBRIUM ; RESONANCE POLARIZATION ; COLLISIONLESS REGIME ; IMAGING-POLARIMETRY
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9983
Collection光纤阵列太阳光学望远镜研究组
Corresponding AuthorLi H(李昊)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011, China
2.University of Chinese Academy of Sciences, Yuquan Road, Shijingshang District, Beijing 100049, China
3.Dipartimento di Astronomia e Scienza dello Spazio, Università di Firenze, Largo E. Fermi 2, I-50125 Firenze, Italy
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li H,Degl'Innocenti, Egidio Landi,Qu ZQ. Polarization of Coronal Forbidden Lines[J]. ASTROPHYSICAL JOURNAL,2017,838(1):69-59.
APA Li H,Degl'Innocenti, Egidio Landi,&Qu ZQ.(2017).Polarization of Coronal Forbidden Lines.ASTROPHYSICAL JOURNAL,838(1),69-59.
MLA Li H,et al."Polarization of Coronal Forbidden Lines".ASTROPHYSICAL JOURNAL 838.1(2017):69-59.
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