Particle Acceleration in Two Converging Shocks
文献类型：期刊论文
| 作者 | Wang, Xin1,2,3,4,5; Giacalone, Joe2; Yan, Yihua3; Ding, Mingde4; Wang, Na1,5; Shan, Hao1,5 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017-06-20 |
| 卷号 | 842期号:2页码:10 |
| ISSN号 | 0004-637X |
| 关键词 | acceleration of particles methods: numerical scattering shock waves Sun: coronal mass ejections (CMEs) turbulence |
| DOI | 10.3847/1538-4357/aa750f |
| 通讯作者 | Wang, Xin(wangxin@xao.ac.cn) |
| 英文摘要 | Observations 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. |
| WOS关键词 | CME-DRIVEN SHOCK ; COSMIC-RAYS ; COLLISIONLESS SHOCKS ; MAGNETIC-FIELD ; INJECTION ; SIMULATIONS ; DISSIPATION ; SCATTERING ; EVENT |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000403419400004 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23051]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Wang, Xin |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：紫金山天文台
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