期刊
PHYSICAL REVIEW LETTERS
卷 126, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.095101
关键词
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资金
- Narodowe Centrum Nauki [2019/33/B/ST9/02569]
- DFG [PO 1508/10-1]
- PLGrid Infrastructure
- North-German Supercomputing Alliance (HLRN) [bbp00014, bbp00033]
The study investigates the amplification of magnetic field within nonrelativistic perpendicular shocks through large-scale particle-in-cell simulations. It is found that the magnetic field is amplified at the shock transition due to ion-ion two-stream Weibel instability and strongly correlates with the Alfvenic Mach number. Measurements derived from particle-in-cell simulations are consistent with those taken at Saturn's bow shock by the Cassini spacecraft.
Collisionless shocks are ubiquitous in the Universe and often associated with a strong magnetic field. Here, we use large-scale particle-in-cell simulations of nonrelativistic perpendicular shocks in the high-Mach-number regime to study the amplification of the magnetic field within shocks. The magnetic field is amplified at the shock transition due to the ion-ion two-streamWeibel instability. The normalized magnetic field strength strongly correlates with the Alfvenic Mach number. Mock spacecraft measurements derived from particle-in-cell simulations are fully consistent with those taken in situ at Saturn's bow shock by the Cassini spacecraft.
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