On the growth of the thermally modified non-resonant streaming instability
arXiv:2010.10237 · doi:10.1093/mnras/staa3465
Abstract
The cosmic rays non-resonant streaming instability is believed to be the source of substantial magnetic field amplification. In this work we investigate the effects of the ambient plasma temperature on the instability and derive analytical expressions of its growth rate in the hot, demagnetized regime of interaction. To study its non-linear evolution we perform hybrid-PIC simulations for a wide range of temperatures. We find that in the cold limit about two-thirds of the cosmic rays drift kinetic energy is converted into magnetic energy. Increasing the temperature of the ambient plasma can substantially reduce the growth rate and the magnitude of the saturated magnetic field.
arXiv commentUnder review in MNRAS
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Cited by in corpus (6)
- Lepton-driven Non-resonant Streaming Instability
- Self-discharge by streaming cosmic rays
- Cosmic-ray current-driven instabilities -- revisiting environmental conditions
- Enhancement of the non-resonant streaming instability by particle collisions
- Interplay between the non-resonant streaming instability and self-generated pressure anisotropies
- Non-resonant Streaming Instability driven by Leptons