GSTDTAP  > 气候变化
DOI10.1002/2017GL072692
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
ISSN0094-8276
EISSN1944-8007
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
被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
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
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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).
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