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http://hdl.handle.net/20.500.12386/26882
Titolo: | Synchrotron masers and fast radio bursts | Autori: | GHISELLINI, Gabriele | Data pubblicazione: | 2017 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 465 | Fascicolo: | 1 | Da pagina:: | L30 | Abstract: | Fast radio bursts, with a typical duration of 1 ms and 1 Jy flux density at gigahertz frequencies, have brightness temperatures exceeding 10<SUP>33</SUP> 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. | URI: | http://hdl.handle.net/20.500.12386/26882 | URL: | https://academic.oup.com/mnrasl/article/465/1/L30/2404603 | ISSN: | 0035-8711 | DOI: | 10.1093/mnrasl/slw202 | Bibcode ADS: | 2017MNRAS.465L..30G | Fulltext: | open |
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