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A Statistical Study on Force-Freeness of Solar Magnetic Fields in the Photosphere
Liu, S.1,2; Su, J. T.1,2; Zhang, H. Q.1,2; Deng, Y. Y.1,2; Gao, Y.1,2; Yang, X.1,2; Mao, X. J.1,2,3
2013-01-24
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
Volume30
AbstractIt is an indisputable fact that solar magnetic fields are force-free in the corona, where force-free fields mean that current and magnetic fields are parallel and there is no Lorentz force in the fields. While the force-free extent of photospheric magnetic fields remains open, in this paper, we give its statistical results. Vector magnetograms (namely, Bx, By, and Bz in heliocentric coordinates) employed are observed by the Solar Magnetic Field Telescope at Huairou Solar Observing Station. We study and calibrate 925 magnetograms calibrated by two sets of calibration coefficients, which indicate the relation between magnetic fields and the strength of the Stokes spectrum and can be calculated either theoretically or empirically. The statistical results show that the majority of active region magnetic fields are not consistent with the force-free model.
KeywordSun: Magnetic Fields Sun: Corona Sun: Photosphere
DOI10.1017/pasa.2012.005
Indexed BySCI
Language英语
WOS IDWOS:000320233400003
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8900
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Key Lab Solar Act, Beijing 100012, Peoples R China
3.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
Recommended Citation
GB/T 7714
Liu, S.,Su, J. T.,Zhang, H. Q.,et al. A Statistical Study on Force-Freeness of Solar Magnetic Fields in the Photosphere[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,2013,30.
APA Liu, S..,Su, J. T..,Zhang, H. Q..,Deng, Y. Y..,Gao, Y..,...&Mao, X. J..(2013).A Statistical Study on Force-Freeness of Solar Magnetic Fields in the Photosphere.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,30.
MLA Liu, S.,et al."A Statistical Study on Force-Freeness of Solar Magnetic Fields in the Photosphere".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA 30(2013).
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