Polarization of Coronal Forbidden Lines

CORC > 云南天文台 > 中国科学院云南天文台 > 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 Landi 3; Qu ZQ(屈中权)1
刊名	ASTROPHYSICAL JOURNAL
	2017-03-20
卷号	838 期号:1
关键词	Sun: corona magnetic fields polarization
ISSN号	0004-637X
通讯作者	Li, Hao(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China)
产权排序	第1完成单位
英文摘要	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.
学科主题	天文学
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	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
收录类别	SCI
原文出处	http://stacks.iop.org/0004-637X/838/i=1/a=69?key=crossref.a48b2f106c34377450a8ca01abbcea05
语种	英语
WOS记录号	WOS:000397896600002
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9983]
专题	云南天文台_光纤阵列太阳光学望远镜研究组
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
推荐引用方式 GB/T 7714	Li H,Degl'Innocenti, Egidio Landi,Qu ZQ. Polarization of Coronal Forbidden Lines[J]. ASTROPHYSICAL JOURNAL,2017,838(1).
APA	Li H,Degl'Innocenti, Egidio Landi,&Qu ZQ.(2017).Polarization of Coronal Forbidden Lines.ASTROPHYSICAL JOURNAL,838(1).
MLA	Li H,et al."Polarization of Coronal Forbidden Lines".ASTROPHYSICAL JOURNAL 838.1(2017).