Synchrotron masers and fast radio bursts

Journal
Date Issued
2017
Author(s)
DOI
Abstract
Fast radio bursts, with a typical duration of 1 ms and 1 Jy flux density at gigahertz frequencies, have brightness temperatures exceeding 1033 K, requiring a coherent emission process. This can be achieved by bunching particles in volumes smaller than the typical wavelength, but this may be challenging. Maser emission is a possibility. Under certain conditions, the synchrotron-stimulated emission process can be more important than true absorption, and a synchrotron maser can be created. This occurs when the emitting electrons have a very narrow distribution of pitch angles and energies. This process overcomes the difficulties of having extremely dense bunches of particles and relaxes the light-crossing time limits, since there is no simple relation between the actual size of the source and the observed variability time-scale.
Volume
465
Issue
1
Start page
L30
Uri
Url
Issn Identifier
0035-8711
Ads BibCode
2017MNRAS.465L..30G
Rights
open.access
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