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Reconstruction of the 2007 May 22 magnetic cloud: How much can we trust the flux-rope geometry of CMES?
Liu, Y; Luhmann, JG; Huttunen, KEJ; Lin, RP; Bale, SD; Russell, CT; Galvin, AB; Liu, Y (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2008
Volume677Issue:2Pages:L133-L136
ISSN2041-8205
Language英语
KeywordMagnetic Fields Solar Wind Sun : Coronal Mass Ejections (Cmes)
AbstractCoronal mass ejections (CMEs) are often assumed to be magnetic flux ropes, but direct proof has been lacking. A key feature, resulting from the translational symmetry of a flux rope, is that the total transverse pressure as well as the axial magnetic field has the same functional form over the vector potential along any crossing of the flux rope. We test this feature ( and hence the flux-rope structure) by reconstructing the 2007 May 22 magnetic cloud ( MC) observed at STEREO B, Wind/ACE, and possibly STEREO A with the Grad-Shafranov (GS) method. The model output from reconstruction at STEREO B agrees fairly well with the magnetic field and thermal pressure observed at ACE/Wind; the separation between STEREO B and ACE/Wind is about 0.06 AU, almost half of the MC radial width. For the first time, we reproduce observations at one spacecraft with data from another well-separated spacecraft, which provides compelling evidence for the flux-rope geometry and is of importance for understanding CME initiation and propagation. We also discuss the global configuration of the MC at different spacecraft on the basis of the reconstruction results.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5170
Collection空间科学部
Corresponding AuthorLiu, Y (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
Recommended Citation
GB/T 7714
Liu, Y,Luhmann, JG,Huttunen, KEJ,et al. Reconstruction of the 2007 May 22 magnetic cloud: How much can we trust the flux-rope geometry of CMES?[J]. ASTROPHYSICAL JOURNAL LETTERS,2008,677(2):L133-L136.
APA Liu, Y.,Luhmann, JG.,Huttunen, KEJ.,Lin, RP.,Bale, SD.,...&Liu, Y .(2008).Reconstruction of the 2007 May 22 magnetic cloud: How much can we trust the flux-rope geometry of CMES?.ASTROPHYSICAL JOURNAL LETTERS,677(2),L133-L136.
MLA Liu, Y,et al."Reconstruction of the 2007 May 22 magnetic cloud: How much can we trust the flux-rope geometry of CMES?".ASTROPHYSICAL JOURNAL LETTERS 677.2(2008):L133-L136.
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