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Statistical analysis of whistler precursors upstream of foreshock transient shocks : MMS observations

Wang, Mengmeng (författare)
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China; Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China
Liu, Terry Z. (författare)
Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, Los Angeles, United States
Zhang, Hui (författare)
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
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Liu, Kaijun (författare)
Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China
Shi, Quanqi (författare)
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Guo, Ruilong (författare)
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Tian, Anmin (författare)
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Sun, Weijie (författare)
Space Sciences Laboratory, University of California, Berkeley, CA, Berkeley, United States
Shen, Xiao-Chen (författare)
Center for Space Physics, Boston University, MA, Boston, United States
Wu, Siyuan (författare)
Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China; LESIA, Observatoire de Paris, CNRS, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
Degeling, Alexander W. (författare)
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Wang, Yan (författare)
Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China
Bai, Shi-Chen (författare)
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China; School of Mathematics and Statistics, Shandong University, Weihai, China
Yao, Zhonghua (författare)
Department of Earth Sciences, The University of Hong Kong, Hong Kong
Li, Wenya (författare)
State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China
Zhang, Shuai (författare)
Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China
Pitkänen, Timo, 1979- (författare)
Umeå universitet,Institutionen för fysik,Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Yao, Shutao (författare)
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Liu, Ji (författare)
Department of Physics, University of Alberta, AB, Edmonton, Canada
Cheng, Kun (författare)
Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China
Ma, Xiao (författare)
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Liu, Yuqi (författare)
Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China
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 (creator_code:org_t)
American Geophysical Union (AGU), 2024
2024
Engelska.
Ingår i: Geophysical Research Letters. - : American Geophysical Union (AGU). - 0094-8276 .- 1944-8007. ; 51:8
Relaterad länk:
https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Using the high-time-resolution data from the Magnetospheric Multiscale mission, precursor waves upstream of foreshock transient (FT) shocks are statistically investigated using the four-spacecraft timing method. The wave frequencies and wave vectors determined in the plasma rest frame (PRF) are shown to follow the cold plasma dispersion relation for whistler waves. Combining with the feature of the right-hand polarization in the PRF, the precursors are identified as whistler-mode waves around the lower hybrid frequency. The occurrence of whistler precursors is independent of the Alfvén Mach number and the FT shock normal angle. More importantly, all the whistler precursors have group velocities pointing upstream in the shock frame, suggesting the dispersive radiation to be a possible generation mechanism. The study improves the understanding of not only the whistler precursors but also the overall FT shock dynamics.

Ämnesord

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
NATURVETENSKAP  -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)

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