Recommended Citation
Lyutikov, Maxim, "The escape of fast radio burst emission from magnetars" (2024). Purdue University Libraries Open Access Publishing Fund. Paper 198.
http://dx.doi.org/10.1093/mnras/stae591
DOI
10.1093/mnras/stae591
Date of this Version
3-15-2024
Keywords
stars, magnetars, fast radio bursts
Abstract
We reconsider the escape of high-brightness coherent emission of fast radio bursts (FRBs) from magnetars’ magnetospheres, and conclude that there are numerous ways for the powerful FRB pulse to avoid non-linear absorption. Sufficiently strong surface magnetic fields, more than or equal to 10 percent of the quantum field, limit the waves’ non-linearity to moderate values. For weaker fields, the electric field experienced by a particle is limited by a combined ponderomotive and parallel-adiabatic forward acceleration of charges by the incoming FRB pulse along the magnetic field lines newly opened during FRB/coronal mass ejection. As a result, particles surf the weaker front part of the pulse, experiencing low radiative losses, and are cleared from the magnetosphere for the bulk of the pulse to propagate. We also find that initial mildly relativistic radial plasma flow further reduces losses.
Comments
This is the publisher PDF of Maxim Lyutikov, The escape of fast radio burst emission from magnetars, Monthly Notices of the Royal Astronomical Society, Volume 529, Issue 3, April 2024, Pages 2180–2190. This article is distributed under a CC-BY license, and is available at DOI: 10.1093/mnras/stae591.