Betatron Cooling of Electrons in Martian Magnetotail
文献类型：期刊论文
| 作者 | Guo, Z. Z.3,4; Fu, H. S.3,4; Cao, J. B.3,4; Fan, K.1 ; Yao, Z. H.1; Liu, Y. Y.3,4; Chen, Z. Z.3,4; Wang, Z.3,4; Liu, X. Y.3,4; Xu, Y.3,4
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| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2021-07-16 |
| 卷号 | 48期号:13页码:10 |
| 关键词 | betatron cooling electron dynamics Martian magnetosphere transient magnetic structure |
| ISSN号 | 0094-8276 |
| DOI | 10.1029/2021GL093826 |
| 英文摘要 | Betatron cooling, a plasma process losing particle energy in the perpendicular direction but reserving particle energy in the field-aligned direction, is a consequence of magnetic depression under the conservation of magnetic moment. Such process has been widely studied in the Earth's magnetosphere but has never been reported in other planetary environment. Here, by utilizing the Mars Atmosphere and Volatile EvolutioN (MAVEN) measurements, we report two events of betatron cooling in the Martian magnetotail. In one of the events, betatron cooling occurs in the suprathermal and energetic ranges of electrons, whereas in the other event, it occurs in the thermal-energy range. We quantitatively reproduce these two processes by using an analytical model. Gratifyingly, the cooling factor derived from the analytical model agrees well with the observation of magnetic depression. These results, for the first time demonstrating the betatron-cooling effect beyond the Earth, are useful to understand the electron dynamics in the planetary magnetosphere. |
| WOS关键词 | ROLLING-PIN DISTRIBUTION ; MAVEN OBSERVATIONS ; DIPOLARIZATION FRONTS ; MAGNETIC RECONNECTION ; ACCELERATION ; WAVES ; DISTRIBUTIONS ; WHISTLER |
| 资助项目 | NSFC[41821003] ; NSFC[41874188] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000694024600022 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | NSFC ; NSFC ; NSFC ; NSFC ; NSFC ; NSFC ; NSFC ; NSFC |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102641]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Fu, H. S. |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Univ Toulouse, CNRS, IRAP, UPS,CNES, Toulouse, France 3.Beihang Univ, Sch Space & Environm, Beijing, Peoples R China 4.Minist Ind & Informat Technol, Key Lab Space Environm Monitoring & Informat Proc, Beijing, Peoples R China 5.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA |
| 推荐引用方式 GB/T 7714 | Guo, Z. Z.,Fu, H. S.,Cao, J. B.,et al. Betatron Cooling of Electrons in Martian Magnetotail[J]. GEOPHYSICAL RESEARCH LETTERS,2021,48(13):10. |
| APA | Guo, Z. Z..,Fu, H. S..,Cao, J. B..,Fan, K..,Yao, Z. H..,...&Mitchell, D. L..(2021).Betatron Cooling of Electrons in Martian Magnetotail.GEOPHYSICAL RESEARCH LETTERS,48(13),10. |
| MLA | Guo, Z. Z.,et al."Betatron Cooling of Electrons in Martian Magnetotail".GEOPHYSICAL RESEARCH LETTERS 48.13(2021):10. |
入库方式： OAI收割
来源：地质与地球物理研究所
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