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The Structure of Solar Coronal Mass Ejections in the Extreme-ultraviolet Passbands
Alternative TitleWOS:000506012000018
Song, H. Q.; Zhang, J.; Li, L. P.; Liu, Y. D.; Zhu, B.; Wang, B.; Zheng, R. S.; Chen, Y.
Source PublicationASTROPHYSICAL JOURNAL
2019
Volume887Issue:2Pages:124
DOI10.3847/1538-4357/ab50b6
ISSN0004-637X
Language英语
KeywordRECONNECTION BRIGHTNESS ORIGIN
AbstractSo far, most studies on the structure of coronal mass ejections (CMEs) are conducted through white-light coronagraphs, demonstrating that about one third of CMEs exhibit the typical three-part structure in the high corona (e.g., beyond 2 R-circle dot), i.e., the bright front, the dark cavity, and the bright core. In this paper, we address the CME structure in the low corona (e.g., below 1.3 R-circle dot) through extreme-ultraviolet (EUV) passbands and find that the three-part CMEs in the white-light images can possess a similar three-part appearance in the EUV images, i.e., a leading edge, a low-density zone, and a filament or hot channel. The analyses identify that the leading edge and the filament or hot channel in the EUV passbands evolve into the front and the core later within several solar radii in the white-light passbands, respectively. What is more, we find that the CMEs without an obvious cavity in the white-light images can also exhibit the clear three-part appearance in the EUV images, which means that the low-density zone in the EUV images (observed as the cavity in white-light images) can be compressed and/or transformed gradually by the expansion of the bright core and/or the reconnection of the magnetic field surrounding the core during the CME propagation outward. Our study suggests that more CMEs can possess the clear three-part structure in their early eruption stage. The nature of the low-density zone between the leading edge and the filament or hot channel is discussed.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7641
Collection中国科学院国家空间科学中心
Affiliation1.[Song, H. Q.
2.Wang, B.
3.Zheng, R. S.
4.Chen, Y.] Shandong Univ, Shandong Prov Key Lab Opt Astron & Solar Terrestr, Weihai 264209, Shandong, Peoples R China
5.[Song, H. Q.
6.Wang, B.
7.Zheng, R. S.
8.Chen, Y.] Shandong Univ, Inst Space Sci, Weihai 264209, Shandong, Peoples R China
9.[Zhang, J.] George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA
10.[Li, L. P.] Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100101, Peoples R China
11.[Liu, Y. D.
12.Zhu, B.] Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Song, H. Q.,Zhang, J.,Li, L. P.,et al. The Structure of Solar Coronal Mass Ejections in the Extreme-ultraviolet Passbands[J]. ASTROPHYSICAL JOURNAL,2019,887(2):124.
APA Song, H. Q..,Zhang, J..,Li, L. P..,Liu, Y. D..,Zhu, B..,...&Chen, Y..(2019).The Structure of Solar Coronal Mass Ejections in the Extreme-ultraviolet Passbands.ASTROPHYSICAL JOURNAL,887(2),124.
MLA Song, H. Q.,et al."The Structure of Solar Coronal Mass Ejections in the Extreme-ultraviolet Passbands".ASTROPHYSICAL JOURNAL 887.2(2019):124.
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