Magnetogenesis by Wave-Driven Momentum Exchange
arXiv:2008.03384 · doi:10.3847/1538-4357/abc4e8
Abstract
When multiple species interact with an electrostatic ion acoustic wave, they can exchange momentum, despite the lack of momentum in the field itself. The resulting force on the electrons can have a curl, and thus give rise to compensating electric fields with curl on magnetohydrodynamic timescales. As a result, a magnetic field can be generated. Surprisingly, in some astrophysical settings, this mechanism can seed magnetic fields with growth rates even larger than through the traditional Biermann battery.
9 pages, 1 figure
References in corpus (5)
- Current status of turbulent dynamo theory: From large-scale to small-scale dynamos
- Fluctuation dynamo in a weakly collisional plasma
- Electromagnetic field generation in the downstream of electrostatic shocks due to electron trapping
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Cited by in corpus (5)
- Suppression of Bremsstrahlung losses from relativistic plasma with energy cutoff
- Wave propagation in rotating magnetised plasmas
- Momentum Conservation in Current Drive and Alpha-Channeling-Mediated Rotation Drive
- Wave-Driven Torques to Drive Current and Rotation
- Ponderomotive Recoil for Electromagnetic Waves