Statistical Analysis of Whistler Precursors Upstream of Foreshock Transient Shocks: MMS Observations-Reference-Cited by-同舟云学术

Statistical Analysis of Whistler Precursors Upstream of Foreshock Transient Shocks: MMS Observations

Published:2024-04-23 Issue:8 Volume:51 Page:
ISSN:0094-8276
Container-title:Geophysical Research Letters
language:en
Short-container-title:Geophysical Research Letters

Author:

Wang Mengmeng¹²^ORCID,Liu Terry Z.³^ORCID,Zhang Hui¹^ORCID,Liu Kaijun²^ORCID,Shi Quanqi¹^ORCID,Guo Ruilong¹^ORCID,Tian Anmin¹^ORCID,Sun Weijie⁴^ORCID,Shen Xiao‐Chen⁵^ORCID,Wu Siyuan²⁶^ORCID,Degeling Alexander W.¹^ORCID,Wang Yan²^ORCID,Bai Shi‐Chen¹⁷^ORCID,Yao Zhonghua⁸^ORCID,Li Wenya⁹^ORCID,Zhang Shuai²^ORCID,Pitkänen Timo¹¹⁰^ORCID,Yao Shutao¹^ORCID,Liu Ji¹¹,Cheng Kun²,Ma Xiao¹^ORCID,Liu Yuqi²^ORCID

Affiliation:

1. Shandong Provincial Key Laboratory of Optical Astronomy and Solar‐Terrestrial Environment Institute of Space Sciences Shandong University Weihai China

2. Department of Earth and Space Sciences Southern University of Science and Technology Shenzhen China

3. Department of Earth, Planetary, and Space Sciences University of California, Los Angeles Los Angeles CA USA

4. Space Sciences Laboratory University of California, Berkeley Berkeley CA USA

5. Center for Space Physics Boston University Boston MA USA

6. LESIA Observatoire de Paris CNRS Université PSL Sorbonne Université Université Paris Cité CNRS Meudon France

7. School of Mathematics and Statistics Shandong University Weihai China

8. Department of Earth Sciences The University of Hong Kong Hong Kong China

9. State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Beijing China

10. Department of Physics Umeå University Umeå Sweden

11. Department of Physics University of Alberta Edmonton AB Canada

Abstract

AbstractUsing 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.

Publisher

American Geophysical Union (AGU)

Link

https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2023GL105617

Reference74 articles.

1. Experimental determination of the dispersion of waves observed upstream of a quasi-perpendicular shock

2. Physics of Collisionless Shocks

3. Observations of low-frequency electromagnetic plasma waves upstream from the Martian shock