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The Deflection of Coronal Mass Ejections by the Ambient Coronal Magnetic Field Configuration
Alternative TitleWOS:000577125000060
Wang, Jingjing1; Hoeksema, J. Todd; Liu, Siqing1,3
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2020
Volume125Issue:8Pages:e2019JA027530
DOI10.1029/2019JA027530
ISSN2169-9380
Language英语
Keywordmagnetic fields coronal mass ejections INTERPLANETARY SOHO PROPAGATION MODEL
AbstractSolar coronal mass ejections (CMEs) are sometimes deflected during their propagation. This deflection may be the consequence of an interaction between the CME and the ambient coronal field, for example, a coronal hole, or the solar wind. The coronal magnetic field configuration is computed from daily synoptic maps of magnetic field from SOHO/MDI and SDO/HMI using a Potential Field Source Surface model. We analyze 30 halo-CMEs whose deflection angle exceeds 90 degrees by comparing the ambient magnetic field configuration and the measurement position angles of the CMEs. We find that the deflection of 87% of the CMEs (26 of 30) is consistent with the ambient magnetic field configuration, agreeing with previous studies. Of these 26, 69% are deflected toward the heliospheric current sheet, the boundary between the magnetic field polarities, and 31% toward a pseudo-streamer, the boundary between same-polarity magnetic field regions. This implies that the ambient coronal magnetic field configuration plays an important role in the deflection of CMEs and that the current sheet configuration is more important than a pseudo-streamer. Of the 26 CMEs, the average and standard deviation of the minimum values of the deflection angle in three dimensions relative to an initially radial trajectory are 28 degrees and 14 degrees, respectively.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7636
Collection中国科学院国家空间科学中心
Affiliation1.Chinese Acad Sci, Natl Space Sci Ctr, Beijing, Peoples R China
2.Chinese Acad Sci, Key Lab Sci & Technol Environm Space Situat Awar, Beijing, Peoples R China
3.Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA
4.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Jingjing,Hoeksema, J. Todd,Liu, Siqing. The Deflection of Coronal Mass Ejections by the Ambient Coronal Magnetic Field Configuration[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2020,125(8):e2019JA027530.
APA Wang, Jingjing,Hoeksema, J. Todd,&Liu, Siqing.(2020).The Deflection of Coronal Mass Ejections by the Ambient Coronal Magnetic Field Configuration.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,125(8),e2019JA027530.
MLA Wang, Jingjing,et al."The Deflection of Coronal Mass Ejections by the Ambient Coronal Magnetic Field Configuration".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 125.8(2020):e2019JA027530.
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