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Astrophysics > High Energy Astrophysical Phenomena

arXiv:2108.05464 (astro-ph)
[Submitted on 11 Aug 2021 (v1), last revised 7 Apr 2022 (this version, v2)]

Title:Scattering of ultrastrong electromagnetic waves by magnetized particles

Authors:Andrei M. Beloborodov
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Abstract: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 $B_{bg}$. This problem is examined by solving the particle motion in the wave. Remarkably, waves with amplitudes $E_0>B_{bg}$ 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 gamma-rays, which can trigger an $e^\pm$ avalanche and, instead of silent escape, the wave will produce X-ray fireworks.
Comments: 5 pages, PRL, in press
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE); Plasma Physics (physics.plasm-ph)
Cite as: arXiv:2108.05464 [astro-ph.HE]
  (or arXiv:2108.05464v2 [astro-ph.HE] for this version)
  https://doi.org/10.48550/arXiv.2108.05464
Related DOI: https://doi.org/10.1103/PhysRevLett.128.255003

Submission history

From: Andrei M. Beloborodov [view email]
[v1] Wed, 11 Aug 2021 22:31:16 UTC (1,056 KB)
[v2] Thu, 7 Apr 2022 16:12:27 UTC (1,070 KB)
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