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Study on Two Methods for Nonlinear Force-Free Extrapolation Based on Semi-Analytical Field
Liu, S.1; Zhang, H. Q.1; Su, J. T.1; Song, M. T.2
2011-03-01
Source PublicationSOLAR PHYSICS
Volume269Issue:1Pages:41-57
AbstractIn this paper, two semi-analytical solutions of force-free fields (Low and Lou, Astrophys. J. 352, 343, 1990) have been used to test two nonlinear force-free extrapolation methods. One is the boundary integral equation (BIE) method developed by Yan and Sakurai (Solar Phys. 195, 89, 2000), and the other is the approximate vertical integration (AVI) method developed by Song et al. (Astrophys. J. 649, 1084, 2006). Some improvements have been made to the AVI method to avoid the singular points in the process of calculation. It is found that the correlation coefficients between the first semi-analytical field and extrapolated field using the BIE method, and also that obtained by the improved AVI method, are greater than 90% below a height 10 of the 64 x 64 lower boundary. For the second semi-analytical field, these correlation coefficients are greater than 80% below the same relative height. Although differences between the semi-analytical solutions and the extrapolated fields exist for both the BIE and AVI methods, these two methods can give reliable results for heights of about 15% of the extent of the lower boundary.
KeywordActive Regions Magnetic Fields Photosphere
DOI10.1007/s11207-010-9691-4
Indexed BySCI
Language英语
WOS IDWOS:000288626700003
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7922
Collection太阳物理研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing, Peoples R China
Recommended Citation
GB/T 7714
Liu, S.,Zhang, H. Q.,Su, J. T.,et al. Study on Two Methods for Nonlinear Force-Free Extrapolation Based on Semi-Analytical Field[J]. SOLAR PHYSICS,2011,269(1):41-57.
APA Liu, S.,Zhang, H. Q.,Su, J. T.,&Song, M. T..(2011).Study on Two Methods for Nonlinear Force-Free Extrapolation Based on Semi-Analytical Field.SOLAR PHYSICS,269(1),41-57.
MLA Liu, S.,et al."Study on Two Methods for Nonlinear Force-Free Extrapolation Based on Semi-Analytical Field".SOLAR PHYSICS 269.1(2011):41-57.
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