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Particle Acceleration at the Pileup Collision of the Twin Shock
Wang, Xin1,2,3,4,5; Giacalone, Joe2; Yan, Yihua3; Ding, Mingde4; Li, Chuan4; Lu, Hong6; Shan, Hao1,5
2019-11-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume885Issue:1Pages:14
Corresponding AuthorWang, Xin(wangxin@xao.ac.cn)
AbstractGround-level enhancement (GLE) events are often associated with large gradual solar events such as fast coronal mass ejections (CMEs), but not all fast CMEs lead to GLE events. Is there a type of coordinated CME that could produce GLEs with larger intensity and higher energies than those in the normal fast isolated CMEs? Here we propose a twin-shock scenario driven by the twin CME coordinately, in which the posterior shock catches up with the preceding shock and has a pileup collision. In the present study, we chose the first GLE event of the solar cycle 24 occurring on 2012 May 17 as an example to investigate the probable association with the twin-shock scenario. We use a dynamic Monte Carlo method to examine the energy spectrum with relevance to the GLE event. In the twin-shock scenario, the seed energetic particles produced by the normal preceding shock can be injected into the posterior shock for reacceleration efficiently. As a result, we obtain the detailed energy spectrum of the solar energetic particles (SEPs) with different behaviors at the related episodes of the twin-shock evolution. Therefore, we predict that the pileup collision of the twin shock would dominate a concave energy spectral slope in the 2012 May 17 SEP event.
Keywordacceleration of particles shock waves solar wind Sun: coronal mass ejections (CMEs)
DOI10.3847/1538-4357/ab4655
WOS KeywordHYDROMAGNETIC WAVE EXCITATION ; EJECTION-DRIVEN SHOCKS ; CORONAL MASS EJECTIONS ; SOLAR ENERGETIC PARTICLES ; EARTHS BOW SHOCK ; ION-ACCELERATION ; MONTE-CARLO ; RADIATION ; TRANSPORT ; UPSTREAM
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000498641700002
PublisherIOP PUBLISHING LTD
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/36611
Collection中国科学院紫金山天文台
Corresponding AuthorWang, Xin
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
2.Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA
3.Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100012, Peoples R China
4.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China
5.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
6.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xin,Giacalone, Joe,Yan, Yihua,et al. Particle Acceleration at the Pileup Collision of the Twin Shock[J]. ASTROPHYSICAL JOURNAL,2019,885(1):14.
APA Wang, Xin.,Giacalone, Joe.,Yan, Yihua.,Ding, Mingde.,Li, Chuan.,...&Shan, Hao.(2019).Particle Acceleration at the Pileup Collision of the Twin Shock.ASTROPHYSICAL JOURNAL,885(1),14.
MLA Wang, Xin,et al."Particle Acceleration at the Pileup Collision of the Twin Shock".ASTROPHYSICAL JOURNAL 885.1(2019):14.
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