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Polarization of Coronal Forbidden Lines
Li H(李昊)1,2; Degl'Innocenti, Egidio Landi3; Qu ZQ(屈中权)1; Li, Hao(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-03-20
卷号838期号:1页码:69-59
DOI10.3847/1538-4357/aa6625
产权排序第1完成单位
收录类别SCI
关键词Sun: Corona Magnetic Fields Polarization
摘要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.
项目资助者NASA ; National Science Foundation of China (NSFC)(11373065, 11527804, 11078005, 10943002) ; Natural Scientific Foundation of Yunnan province(2010CD113) ; Chinese Academy of Sciences President's International Fellowship Initiative(2016VMA056)
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2017-04-25
WOS记录号WOS:000397896600002
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]VECTOR MAGNETIC-FIELDS ; EMISSION-LINE ; SOLAR CORONA ; SPECTRAL-LINES ; FE-XIV ; POLAR-REGION ; STATISTICAL EQUILIBRIUM ; RESONANCE POLARIZATION ; COLLISIONLESS REGIME ; IMAGING-POLARIMETRY
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9983
专题光纤阵列太阳光学望远镜研究组
通讯作者Li, Hao(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China)
作者单位1.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
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GB/T 7714
Li H,Degl'Innocenti, Egidio Landi,Qu ZQ,et al. Polarization of Coronal Forbidden Lines[J]. ASTROPHYSICAL JOURNAL,2017,838(1):69-59.
APA Li H,Degl'Innocenti, Egidio Landi,Qu ZQ,&Li, Hao.(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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