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On the influence of magnetic fields on level populations
Qu ZQ(屈中权)1,2; Xu CL(胥成林)1,3; Zhang XY(张霄宇)1; Yan XL(闫晓理)1,3; Jin CL(金春兰)1,3; Qu, ZQ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China.
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2006-08-21
Volume370Issue:4Pages:1790-1796
DOI10.1111/j.1365-2966.2006.10598.x
Contribution Rank第1完成单位
Indexed BySCI
KeywordAtomic Processes Line : Formation Polarization Radiation Mechanisms : Non-thermal Radiative Transfer Sun : Magnetic Fields
AbstractThe influence of magnetic fields on the energy level populations of atoms is firstly studied by analysing the Stokes profiles of Fe I 6302.5 forming in the solar magnetized atmosphere, with the aid of a departure factor defined to evaluate the deviation from the normal Boltzmann distribution without a magnetic field. This factor is directly related to the ratio of line-source function to the continuum one. The relationship between the departure and the magnetic field reveals an effect that the magnetic field induces an exponential increase in the level population of the lower level of Fe I 6302.5 (Lande factor g = 2.5) with the field strength. This indicates that the magnetic field can cause the redistribution of populations of those levels whose Land e factors are non-zero. Therefore, this effect should be included in the calculation of the statistical equilibrium. Secondly, an experiment utilizing the Hg5461 line in the laboratory on the Earth is carried out to reveal that the exponential relation is independent of variations in temperature, and the excitation is completely magneto-induced. Finally, the exponential relation is explained by taking account of the magnetic energy in the Boltzmann distribution.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0035-8711
URL查看原文
Archive Date2006-09-07
WOS IDWOS:000239517300017
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSTOKES PROFILE ANALYSIS ; OPTICAL TOMOGRAPHY ; WILSON DEPRESSION ; INVERSION ; SUNSPOT ; LINES ; STRATIFICATION
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6088
Collection太阳物理研究组
Corresponding AuthorQu, ZQ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China.
Affiliation1.Yunnan Astronomical Observatory/National Astronomical Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Max-Planck-Institute for Solar System Research (MPS), Max-Planck Street 2, D-37191 Katlenburg-Lindau, Germany
3.Graduate School of the Chinese Academy of Sciences, Zhongguancun, Beijing 100036, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qu ZQ,Xu CL,Zhang XY,et al. On the influence of magnetic fields on level populations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2006,370(4):1790-1796.
APA Qu ZQ,Xu CL,Zhang XY,Yan XL,Jin CL,&Qu, ZQ .(2006).On the influence of magnetic fields on level populations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,370(4),1790-1796.
MLA Qu ZQ,et al."On the influence of magnetic fields on level populations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 370.4(2006):1790-1796.
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