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Journal Article

Scattering of ultrastrong electromagnetic waves by magnetized particles


Beloborodov,  Andrei M.
Galaxy Formation, Cosmology, MPI for Astrophysics, Max Planck Society;

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Beloborodov, A. M. (2022). Scattering of ultrastrong electromagnetic waves by magnetized particles. Physical Review Letters, 128(25): 255003. doi:10.1103/PhysRevLett.128.255003.

Cite as: https://hdl.handle.net/21.11116/0000-000B-58F7-C
Observations of powerful radio waves from neutron star magnetospheres raise the question of how strong waves interact with particles in a strong background magnetic field Bbg. This problem is examined by solving the particle motion in the wave. Remarkably, waves with amplitudes E0>Bbg pump particle energy via repeating resonance events, quickly reaching the radiation reaction limit. As a result, the wave is scattered with a huge cross section. This fact has implications for models of fast radio bursts and magnetars. Particles accelerated in the wave emit γ rays, which can trigger an e± avalanche and, instead of silent escape, the wave will produce x-ray fireworks.