Physical Roles of Interstellar-origin Pickup Ions at Heliospheric Termination Shock. II. Impact of the Front Nonstationary on the Energy Partition and Particle Velocity Distribution
文献类型：期刊论文
| 作者 | Lembege, Bertrand; Yang, Zhongwei; Lembege, B (reprint author), CNRS, UVSQ, IPSL, LATMOS, F-78280 Guyancourt, France. |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018 |
| 卷号 | 860期号:1页码:84 |
| 关键词 | Acceleration Of Particles Plasmas Shock Waves Sun: Heliosphere |
| ISSN号 | 0004-637X |
| 英文摘要 | The impact of the nonstationarity of the heliospheric termination shock in the presence of pickup ions (PUIs) on the energy partition between different plasma components is analyzed self-consistently by using a one-dimensional particle-in-cell simulation code. Solar wind ions (SWIs) and PUIs are introduced as Maxwellian and shell distributions, respectively. For a fixed time, (a) with a percentage of 25% PUIs, a large part of the downstream thermal pressure is carried by reflected PUIs, in agreement with previous hybrid simulations; (b) the total downstream distribution includes three main components: (i) a low-energy component dominated by directly transmitted (DT) SWIs, (ii) a high-energy component dominated by reflected PUIs, and (iii) an intermediate-energy component dominated by reflected SWIs and DT PUIs. Moreover, results show that the front nonstationarity (self-reformation) persists even in presence of 25% PUIs, and has some impacts on both SWIs and PUIs: (a) the rate of reflected ions suffers some time fluctuations for both SWIs and PUIs; (b) the relative percentage of downstream thermal pressure transfered to PUIs and SWIs also suffers some time fluctuations, but depends on the relative distance from the front; (c) the three components within the total downstream heliosheath distribution persist in time, but the contribution of the ion subpopulations to the low-and intermediate-energy components are redistributed by the front nonstationarity. Our results allow clarifying the respective roles of SWIs and PUIs as a viable production source of energetic neutral atoms and are compared with previous results. |
| 语种 | 英语 |
| 资助机构 | Centre National d'Etudes Spatiales (CNES) in France ; NFSC [41574140, 41374173] ; Open Research Program Key laboratory of Geospace Environment CAS ; Youth Innovation Promotion Association Funding [2017188] ; Strategic Priority Program on Space Science [XDA15011300] ; Beijing Excellent Talent Training Project Funding [2017000097607G049] ; Specialized Research Fund for State Key Laboratories of China |
| 源URL | [http://ir.nssc.ac.cn/handle/122/6361]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 通讯作者 | Lembege, B (reprint author), CNRS, UVSQ, IPSL, LATMOS, F-78280 Guyancourt, France. |
| 推荐引用方式 GB/T 7714 | Lembege, Bertrand,Yang, Zhongwei,Lembege, B . Physical Roles of Interstellar-origin Pickup Ions at Heliospheric Termination Shock. II. Impact of the Front Nonstationary on the Energy Partition and Particle Velocity Distribution[J]. ASTROPHYSICAL JOURNAL,2018,860(1):84. |
| APA | Lembege, Bertrand,Yang, Zhongwei,&Lembege, B .(2018).Physical Roles of Interstellar-origin Pickup Ions at Heliospheric Termination Shock. II. Impact of the Front Nonstationary on the Energy Partition and Particle Velocity Distribution.ASTROPHYSICAL JOURNAL,860(1),84. |
| MLA | Lembege, Bertrand,et al."Physical Roles of Interstellar-origin Pickup Ions at Heliospheric Termination Shock. II. Impact of the Front Nonstationary on the Energy Partition and Particle Velocity Distribution".ASTROPHYSICAL JOURNAL 860.1(2018):84. |
入库方式： OAI收割
来源：国家空间科学中心
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