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Correlation between Angular Widths of CMEs and Characteristics of Their Source Regions
Zhao, X. H.; Feng, X. S.; Feng, H. Q.; Li, Z.; Zhao, XH (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.; Zhao, XH (reprint author), HIT Inst Space Sci & Appl Technol, Shenzhen 518055, Peoples R China.
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL
2017
Volume849Issue:1Pages:79
ISSN0004-637X
Language英语
KeywordSolar-terrestrial Relations Sun: Coronal Mass Ejections (Cmes) Sun: Flares Sunspots
AbstractThe angular width of a coronal mass ejection (CME) is an important factor in determining whether the corresponding interplanetary CME (ICME) and its preceding shock will reach Earth. However, there have been very few studies of the decisive factors of the CME's angular width. In this study, we use the three-dimensional (3D) angular width of CMEs obtained from the Graduated Cylindrical Shell model based on observations of Solar Terrestrial Relations Observatory (STEREO) to study the relations between the CME's 3D width and characteristics of the CME's source region. We find that for the CMEs produced by active regions (ARs), the CME width has some correlations with the AR's area and flux, but these correlations are not strong. The magnetic flux contained in the CME seems to come from only part of the AR's total flux. For the CMEs produced by flare regions, the correlations between the CME angular width and the flare region's area and flux are strong. The magnetic flux within those CMEs seems to come from the whole flare region or even from a larger region than the flare. Our findings show that the CME's 3D angular width can be generally estimated based on observations of Solar Dynamics Observatory for the CME's source region instead of the observations from coronagraphs on board the Solar and Heliospheric Observatory and STEREO if the two foot points of the CME stay in the same places with no expansion of the CME in the transverse direction until reaching Earth.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6066
Collection空间科学部
Corresponding AuthorZhao, XH (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.; Zhao, XH (reprint author), HIT Inst Space Sci & Appl Technol, Shenzhen 518055, Peoples R China.
Recommended Citation
GB/T 7714
Zhao, X. H.,Feng, X. S.,Feng, H. Q.,et al. Correlation between Angular Widths of CMEs and Characteristics of Their Source Regions[J]. ASTROPHYSICAL JOURNAL,2017,849(1):79.
APA Zhao, X. H.,Feng, X. S.,Feng, H. Q.,Li, Z.,Zhao, XH ,&Zhao, XH .(2017).Correlation between Angular Widths of CMEs and Characteristics of Their Source Regions.ASTROPHYSICAL JOURNAL,849(1),79.
MLA Zhao, X. H.,et al."Correlation between Angular Widths of CMEs and Characteristics of Their Source Regions".ASTROPHYSICAL JOURNAL 849.1(2017):79.
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