Mechanism for fast radio bursts

Fast radio bursts are mysterious transient sources likely located at cosmological distances. The derived brightness temperatures exceed by many orders of magnitude the self-absorption limit of incoherent synchrotron radiation, implying the operation of a coherent emission process. We propose a radia...

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Detalles Bibliográficos
Autores principales: Romero, Gustavo Esteban, Valle, María Victoria del, Vieyro, Florencia Laura
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Ciencias Exactas
Física
Physics
Fast radio bursts
Radiation mechanism
Astrophysical scenarios
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125837
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125837
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Physics
Fast radio bursts
Radiation mechanism
Astrophysical scenarios
spellingShingle Ciencias Exactas
Física
Physics
Fast radio bursts
Radiation mechanism
Astrophysical scenarios
Romero, Gustavo Esteban
Valle, María Victoria del
Vieyro, Florencia Laura
Mechanism for fast radio bursts
topic_facet Ciencias Exactas
Física
Physics
Fast radio bursts
Radiation mechanism
Astrophysical scenarios
description Fast radio bursts are mysterious transient sources likely located at cosmological distances. The derived brightness temperatures exceed by many orders of magnitude the self-absorption limit of incoherent synchrotron radiation, implying the operation of a coherent emission process. We propose a radiation mechanism for fast radio bursts where the emission arises from collisionless bremsstrahlung in strong plasma turbulence excited by relativistic electron beams. We discuss possible astrophysical scenarios in which this process might operate. The emitting region is a turbulent plasma hit by a relativistic jet, where Langmuir plasma waves produce a concentration of intense electrostatic soliton-like regions (cavitons). The resulting radiation is coherent and, under some physical conditions, can be polarized and have a power-law distribution in energy. We obtain radio luminosities in agreement with the inferred values for fast radio bursts. The time scale of the radio flare in some cases can be extremely fast, of the order of 10⁻³ s. The mechanism we present here can explain the main features of fast radio bursts and is plausible in different astrophysical sources, such as gamma-ray bursts and some active galactic nuclei.
format Articulo
Articulo
author Romero, Gustavo Esteban
Valle, María Victoria del
Vieyro, Florencia Laura
author_facet Romero, Gustavo Esteban
Valle, María Victoria del
Vieyro, Florencia Laura
author_sort Romero, Gustavo Esteban
title Mechanism for fast radio bursts
title_short Mechanism for fast radio bursts
title_full Mechanism for fast radio bursts
title_fullStr Mechanism for fast radio bursts
title_full_unstemmed Mechanism for fast radio bursts
title_sort mechanism for fast radio bursts
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/125837
work_keys_str_mv AT romerogustavoesteban mechanismforfastradiobursts
AT vallemariavictoriadel mechanismforfastradiobursts
AT vieyroflorencialaura mechanismforfastradiobursts
bdutipo_str Repositorios
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