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DOI | 10.1002/2017GL072692 |
Growth rate measurement of ULF waves in the ion foreshock | |
Dorfman, S.1; Hietala, H.2; Astfalk, P.1,3; Angelopoulos, V.2 | |
2017-03-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | We report the first satellite measurement of the ultralow frequency (ULF) wave growth rate in the upstream region of the Earth's bow shock. We employ the two identical ARTEMIS spacecraft orbiting the Moon to characterize crescent-shaped reflected ion beams and relatively monochromatic ULF waves. The event presented here features spacecraft separation of similar to 2.5 Earth radii (0.9 +/- 0.1 wavelengths) in the solar wind flow direction along a nearly radial interplanetary magnetic field. The ULF wave growth rate is estimated and found to fall within dispersion solver predictions during the initial growth time. Observed frequencies and wave numbers are also within the predicted range. Other ULF wave properties such as the phase speed, obliquity, and polarization are consistent with expectations from resonant beam instability theory and prior satellite measurements. These results will inform future missions near bow and interplanetary shocks as well as future nonlinear studies related to turbulence and dissipation in the heliosphere. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398183700009 |
WOS关键词 | 4-SPACECRAFT CLUSTER MISSION ; PLASMA REST FRAME ; BOW SHOCK ; TERRESTRIAL FORESHOCK ; MAGNETOSONIC WAVES ; UPSTREAM ; GENERATION ; ACCELERATION ; INSTABILITY ; PROTONS |
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/28457 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA; 2.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA; 3.Max Planck Inst Plasma Phys, Greifswald, Germany |
推荐引用方式 GB/T 7714 | Dorfman, S.,Hietala, H.,Astfalk, P.,et al. Growth rate measurement of ULF waves in the ion foreshock[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(5). |
APA | Dorfman, S.,Hietala, H.,Astfalk, P.,&Angelopoulos, V..(2017).Growth rate measurement of ULF waves in the ion foreshock.GEOPHYSICAL RESEARCH LETTERS,44(5). |
MLA | Dorfman, S.,et al."Growth rate measurement of ULF waves in the ion foreshock".GEOPHYSICAL RESEARCH LETTERS 44.5(2017). |
条目包含的文件 | 条目无相关文件。 |
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