PMO OpenIR
Particle Acceleration in Two Converging Shocks
Wang, Xin1,2,3,4,5; Giacalone, Joe2; Yan, Yihua3; Ding, Mingde4; Wang, Na1,5; Shan, Hao1,5
2017-06-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume842Issue:2Pages:10
Corresponding AuthorWang, Xin(wangxin@xao.ac.cn)
AbstractObservations by spacecraft such as ACE, STEREO, and others show that there are proton spectral "breaks" with energy E-br at 1-10 MeV in some large CME-driven shocks. Generally, a single shock with the diffusive acceleration mechanism would not predict the "broken" energy spectrum. The present paper focuses on two converging shocks to identify this energy spectral feature. In this case, the converging shocks comprise one forward CME-driven shock on 2006 December 13 and another backward Earth bow shock. We simulate the detailed particle acceleration processes in the region of the converging shocks using the Monte Carlo method. As a result, we not only obtain an extended energy spectrum with an energy "tail" up to a few 10 MeV higher than that in previous single shock model, but also we find an energy spectral "break" occurring on similar to 5.5 MeV. The predicted energy spectral shape is consistent with observations from multiple spacecraft. The spectral "break," then, in this case is caused by the interaction between the CME shock and Earth's bow shock, and otherwise would not be present if Earth were not in the path of the CME.
Keywordacceleration of particles methods: numerical scattering shock waves Sun: coronal mass ejections (CMEs) turbulence
DOI10.3847/1538-4357/aa750f
WOS KeywordCME-DRIVEN SHOCK ; COSMIC-RAYS ; COLLISIONLESS SHOCKS ; MAGNETIC-FIELD ; INJECTION ; SIMULATIONS ; DISSIPATION ; SCATTERING ; EVENT
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000403419400004
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23052
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, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Jiangsu, Peoples R China
5.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xin,Giacalone, Joe,Yan, Yihua,et al. Particle Acceleration in Two Converging Shocks[J]. ASTROPHYSICAL JOURNAL,2017,842(2):10.
APA Wang, Xin,Giacalone, Joe,Yan, Yihua,Ding, Mingde,Wang, Na,&Shan, Hao.(2017).Particle Acceleration in Two Converging Shocks.ASTROPHYSICAL JOURNAL,842(2),10.
MLA Wang, Xin,et al."Particle Acceleration in Two Converging Shocks".ASTROPHYSICAL JOURNAL 842.2(2017):10.
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