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Global Non-Potential Magnetic Models of the Solar Corona During the March 2015 Eclipse
Yeates, Anthony R.; Amari, Tahar; Contopoulos, Ioannis; Feng, Xueshang; Mackay, Duncan H.; Mikic, Zoran; Wiegelmann, Thomas; Hutton, Joseph; Lowder, Christopher A.; Morgan, Huw; Petrie, Gordon; Rachmeler, Laurel A.; Upton, Lisa A.; Canou, Aurelien; Chopin, Pierre; Downs, Cooper; Druckmueller, Miloslav; Linker, Jon A.; Seaton, Daniel B.; Torok, Tibor; Yeates, AR (reprint author), Univ Durham, Dept Math Sci, Sci Labs, South Rd, Durham DH1 3LE, England.
作者部门空间科学部
发表期刊SPACE SCIENCE REVIEWS
2018
卷号214期号:5页码:UNSP 99
ISSN0038-6308
语种英语
关键词Magnetic Fields Sun: Surface Magnetism Sun: Corona
摘要Seven different models are applied to the same problem of simulating the Sun's coronal magnetic field during the solar eclipse on 2015 March 20. All of the models are non-potential, allowing for free magnetic energy, but the associated electric currents are developed in significantly different ways. This is not a direct comparison of the coronal modelling techniques, in that the different models also use different photospheric boundary conditions, reflecting the range of approaches currently used in the community. Despite the significant differences, the results show broad agreement in the overall magnetic topology. Among those models with significant volume currents in much of the corona, there is general agreement that the ratio of total to potential magnetic energy should be approximately 1.4. However, there are significant differences in the electric current distributions; while static extrapolations are best able to reproduce active regions, they are unable to recover sheared magnetic fields in filament channels using currently available vector magnetogram data. By contrast, time-evolving simulations can recover the filament channel fields at the expense of not matching the observed vector magnetic fields within active regions. We suggest that, at present, the best approach may be a hybrid model using static extrapolations but with additional energization informed by simplified evolution models. This is demonstrated by one of the models.
收录类别SCI ; EI
文献类型期刊论文
条目标识符http://ir.nssc.ac.cn/handle/122/6395
专题空间科学部
通讯作者Yeates, AR (reprint author), Univ Durham, Dept Math Sci, Sci Labs, South Rd, Durham DH1 3LE, England.
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Yeates, Anthony R.,Amari, Tahar,Contopoulos, Ioannis,et al. Global Non-Potential Magnetic Models of the Solar Corona During the March 2015 Eclipse[J]. SPACE SCIENCE REVIEWS,2018,214(5):UNSP 99.
APA Yeates, Anthony R..,Amari, Tahar.,Contopoulos, Ioannis.,Feng, Xueshang.,Mackay, Duncan H..,...&Yeates, AR .(2018).Global Non-Potential Magnetic Models of the Solar Corona During the March 2015 Eclipse.SPACE SCIENCE REVIEWS,214(5),UNSP 99.
MLA Yeates, Anthony R.,et al."Global Non-Potential Magnetic Models of the Solar Corona During the March 2015 Eclipse".SPACE SCIENCE REVIEWS 214.5(2018):UNSP 99.
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