IGGCAS OpenIR  > 地球与行星物理院重点实验室
Multiple-point Modeling the Parker Spiral Configuration of the Solar Wind Magnetic Field at the Solar Maximum of Solar Cycle 24
Chang,Qing1; Xu,Xiaojun1; Xu,Qi1; Zhong,Jun2; Xu,Jiaying1; Wang,Jing1; Zhang,Tielong3,4
2019-10-15
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume884Issue:2
AbstractAbstract By assuming that the solar wind flow is spherically symmetric and that the flow speed becomes constant beyond some critical distance r?=?R0 (neglecting solar gravitation and acceleration by high coronal temperature), the large-scale solar wind magnetic field lines are distorted into a Parker spiral configuration, which is usually simplified to an Archimedes spiral. Using magnetic field observations near Mercury, Venus, and Earth during solar maximum of Solar Cycle 24, we statistically surveyed the Parker spiral angles and obtained the empirical equations of the Archimedes and Parker spirals by fitting the multiple-point results. We found that the solar wind magnetic field configurations are slightly different during different years. Archimedes and Parker spiral configurations are quite different from each other within 1 au. Our results provide empirical Archimedes and Parker spiral equations that depend on the solar wind velocity and the critical distance (R0). It is inferred that R0 is much larger than that previously assumed. In the near future, the statistical survey of the near-Sun solar wind velocity by Parker Solar Probe can help verify this result.
Keywordplanets and satellites: magnetic fields Sun: activity Sun: magnetic fields solar wind
DOI10.3847/1538-4357/ab412a
Language英语
WOS IDIOP:0004-637X-884-2-ab412a
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93870
Collection地球与行星物理院重点实验室
Affiliation1.State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macao, People's Republic of China; xjxu@must.edu.mo
2.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, People’s Republic of China
3.Harbin Institute of Technology, Shenzhen, People’s Republic of China
4.Space Research Institute, Austrian Academy of Sciences, Graz, Austria
Recommended Citation
GB/T 7714
Chang,Qing,Xu,Xiaojun,Xu,Qi,et al. Multiple-point Modeling the Parker Spiral Configuration of the Solar Wind Magnetic Field at the Solar Maximum of Solar Cycle 24[J]. The Astrophysical Journal,2019,884(2).
APA Chang,Qing.,Xu,Xiaojun.,Xu,Qi.,Zhong,Jun.,Xu,Jiaying.,...&Zhang,Tielong.(2019).Multiple-point Modeling the Parker Spiral Configuration of the Solar Wind Magnetic Field at the Solar Maximum of Solar Cycle 24.The Astrophysical Journal,884(2).
MLA Chang,Qing,et al."Multiple-point Modeling the Parker Spiral Configuration of the Solar Wind Magnetic Field at the Solar Maximum of Solar Cycle 24".The Astrophysical Journal 884.2(2019).
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