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DOI | 10.1002/2016GL072419 |
Rosetta measurements of lower hybrid frequency range electric field oscillations in the plasma environment of comet 67P | |
Karlsson, T.1; Eriksson, A. I.2; Odelstad, E.2; Andre, M.2; Dickeli, G.1; Kullen, A.1; Lindqvist, P. -A.1; Nilsson, H.3; Richter, I.4 | |
2017-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Germany |
英文摘要 | Electric field measurements from cometary environments are very rare but can provide important information on how plasma waves help fashion the plasma environment. The long dwelling time of the Rosetta spacecraft close to comet 67P/Churyumov-Gerasimenko promises to improve this state. We here present the first electric field measurements from 67P, performed by the Rosetta dual Langmuir probe instrument LAP. Measurements of the electric field from cometocentric distances of 149 and 348 km are presented together with estimates of plasma density changes. Persistent wave activity around the local H2O+ lower hybrid frequency is observed, with the largest amplitudes observed at sharp plasma gradients. We demonstrate that the necessary requirements for the lower hybrid drift instability to be operating are fulfilled. We suggest that lower hybrid waves are responsible for the creation of a warm electron population, the origins of which have been unknown so far, by heating ambient electrons in the magnetic field-parallel direction. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396411100004 |
WOS关键词 | DRIFT INSTABILITY ; MAGNETIC-FIELD ; SPACECRAFT OBSERVATIONS ; WAVE TURBULENCE ; RPC ; REGION ; MAGNETOPAUSE ; VICINITY ; PROBE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27216 |
专题 | 气候变化 |
作者单位 | 1.KTH Royal Inst Technol, Sch Elect Engn, Dept Space & Plasma Phys, Stockholm, Sweden; 2.Swedish Inst Space Phys, Uppsala, Sweden; 3.Swedish Inst Space Phys, Kiruna, Sweden; 4.Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterrestrial Phys, Braunschweig, Germany |
推荐引用方式 GB/T 7714 | Karlsson, T.,Eriksson, A. I.,Odelstad, E.,et al. Rosetta measurements of lower hybrid frequency range electric field oscillations in the plasma environment of comet 67P[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(4). |
APA | Karlsson, T..,Eriksson, A. I..,Odelstad, E..,Andre, M..,Dickeli, G..,...&Richter, I..(2017).Rosetta measurements of lower hybrid frequency range electric field oscillations in the plasma environment of comet 67P.GEOPHYSICAL RESEARCH LETTERS,44(4). |
MLA | Karlsson, T.,et al."Rosetta measurements of lower hybrid frequency range electric field oscillations in the plasma environment of comet 67P".GEOPHYSICAL RESEARCH LETTERS 44.4(2017). |
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