Polarization of Coronal Forbidden Lines
文献类型：期刊论文
| 作者 | Li H(李昊)1,2 ; Degl'Innocenti, Egidio Landi3; Qu ZQ(屈中权)1
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2017-03-20 |
| 卷号 | 838期号:1 |
| 关键词 | Sun: corona magnetic fields polarization |
| ISSN号 | 0004-637X |
| 产权排序 | 第1完成单位 |
| 通讯作者 | Li, Hao(Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China) |
| 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | 天文学 |
| 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 |
| 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). |
入库方式： OAI收割
来源：云南天文台
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