Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/122384
Title: A model for the repeating FRB 121102 in the AGN scenario
Author: Vieyro, F. L.
Romero, G. E.
Bosch i Ramon, Valentí
Marcote Martin, Benito
Valle, M. V. del
Keywords: Galàxies actives
Cosmologia
Active galaxies
Cosmology
Issue Date: 14-Jun-2017
Publisher: EDP Sciences
Abstract: Context. Fast radio bursts (FRBs) are transient sources of unknown origin. Recent radio and optical observations have provided strong evidence for an extragalactic origin of the phenomenon and the precise localization of the repeating FRB 121102. Observations using the Karl G. Jansky Very Large Array (VLA) and very-long-baseline interferometry (VLBI) have revealed the existence of a continuum non-thermal radio source consistent with the location of the bursts in a dwarf galaxy. All these new data rule out several models that were previously proposed, and impose stringent constraints to new models. Aims. We aim to model FRB 121102 in light of the new observational results in the active galactic nucleus (AGN) scenario. Methods. We propose a model for repeating FRBs in which a non-steady relativistic e±-beam, accelerated by an impulsive magnetohydrodynamic driven mechanism, interacts with a cloud at the centre of a star-forming dwarf galaxy. The interaction generates regions of high electrostatic field called cavitons in the plasma cloud. Turbulence is also produced in the beam. These processes, plus particle isotropization, the interaction scale, and light retardation effects, provide the necessary ingredients for short-lived, bright coherent radiation bursts. Results. The mechanism studied in this work explains the general properties of FRB 121102, and may also be applied to other repetitive FRBs. Conclusions. Coherent emission from electrons and positrons accelerated in cavitons provides a plausible explanation of FRBs.
Note: Reproducció del document publicat a: https://doi.org/10.1051/0004-6361/201730556
It is part of: Astronomy & Astrophysics, 2017, vol. 602, num. A64
URI: http://hdl.handle.net/2445/122384
Related resource: https://doi.org/10.1051/0004-6361/201730556
ISSN: 0004-6361
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Física Quàntica i Astrofísica)

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