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Solar Cycle Dependence of ICME Composition
Song, Hongqiang1,2; Li, Leping2; Sun, Yanyan1; Lv, Qi1; Zheng, Ruisheng1; Chen, Yao1
2021-07-01
Source PublicationSOLAR PHYSICS
ISSN0038-0938
Volume296Issue:7Pages:18
AbstractCoronal mass ejections (CMEs) belong to the most energetic explosions in the solar atmosphere, and their occurrence rates exhibit obvious solar cycle dependence with more events taking place around solar maximum. Composition of interplanetary CMEs (ICMEs), referring to the charge states and elemental abundances of ions, opens an important avenue to investigate CMEs. In this paper, we conduct a statistical study on the charge states of five elements (Mg, Fe, Si, C, and O) and the relative abundances of six elements (Mg/O, Fe/O, Si/O, C/O, Ne/O, and He/O) within ICMEs from 1998 to 2011, and find that all the ICME compositions possess a solar cycle dependence. All of the ionic charge states and most of the relative elemental abundances are positively correlated with sunspot numbers (SSNs), and only the C/O ratios are inversely correlated with the SSNs. The compositions (except the C/O) increase with the SSNs during the ascending phase (1998-2000 and 2009-2011) and remain elevated during solar maximum and descending phase (2000-2005) compared to solar minimum (2007-2009). The charge states of low-FIP (first ionization potential) elements (Mg, Fe, and Si) and their relative abundances are correlated well, while no clear correlation is observed between the C6+/C5+ or C6+/C4+ and C/O. Most interestingly, we find that the Ne/O ratios of ICMEs and slow solar wind have the opposite solar cycle dependence.
KeywordSun coronal mass ejections (CMEs) Sun flares Sun abundances
Funding OrganizationNSFC ; NSFC ; CAS ; CAS ; open research program of the CAS Key Laboratory of Solar Activity ; open research program of the CAS Key Laboratory of Solar Activity ; NSFC ; NSFC ; CAS ; CAS ; open research program of the CAS Key Laboratory of Solar Activity ; open research program of the CAS Key Laboratory of Solar Activity ; NSFC ; NSFC ; CAS ; CAS ; open research program of the CAS Key Laboratory of Solar Activity ; open research program of the CAS Key Laboratory of Solar Activity ; NSFC ; NSFC ; CAS ; CAS ; open research program of the CAS Key Laboratory of Solar Activity ; open research program of the CAS Key Laboratory of Solar Activity
DOI10.1007/s11207-021-01852-y
WOS KeywordCORONAL MASS EJECTIONS ; MAGNETIC-FLUX ROPE ; ION CHARGE STATES ; WIND ; ABUNDANCES ; ACCELERATION ; RECONNECTION ; EVOLUTION ; FLARES ; MODEL
Language英语
Funding ProjectNSFC[U2031109] ; NSFC[11790303] ; NSFC[11790300] ; NSFC[12073042] ; CAS[XDA-17040507] ; open research program of the CAS Key Laboratory of Solar Activity[KLSA202107]
Funding OrganizationNSFC ; NSFC ; CAS ; CAS ; open research program of the CAS Key Laboratory of Solar Activity ; open research program of the CAS Key Laboratory of Solar Activity ; NSFC ; NSFC ; CAS ; CAS ; open research program of the CAS Key Laboratory of Solar Activity ; open research program of the CAS Key Laboratory of Solar Activity ; NSFC ; NSFC ; CAS ; CAS ; open research program of the CAS Key Laboratory of Solar Activity ; open research program of the CAS Key Laboratory of Solar Activity ; NSFC ; NSFC ; CAS ; CAS ; open research program of the CAS Key Laboratory of Solar Activity ; open research program of the CAS Key Laboratory of Solar Activity
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000691569000002
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75407
Collection中国科学院国家天文台
Corresponding AuthorSong, Hongqiang
Affiliation1.Shandong Univ, Inst Space Sci, Shandong Key Lab Opt Astron & Solar Terr Environm, Weihai 264209, Shandong, Peoples R China
2.Chinese Acad Sci, CAS Key Lab Solar Act, Natl Astron Observ, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Song, Hongqiang,Li, Leping,Sun, Yanyan,et al. Solar Cycle Dependence of ICME Composition[J]. SOLAR PHYSICS,2021,296(7):18.
APA Song, Hongqiang,Li, Leping,Sun, Yanyan,Lv, Qi,Zheng, Ruisheng,&Chen, Yao.(2021).Solar Cycle Dependence of ICME Composition.SOLAR PHYSICS,296(7),18.
MLA Song, Hongqiang,et al."Solar Cycle Dependence of ICME Composition".SOLAR PHYSICS 296.7(2021):18.
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