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Short Hard Gamma Ray Bursts And Their Afterglows

Long duration gamma ray bursts (GRBs) and X-ray flashes (XRFs) are produced by highly- relativistic jets ejected in core-collapse supernova explosions. The origin of short hard gamma-ray bursts (SHBs) has not been established. They may be produced by highly relativistic jets ejected in various proce...

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Detalles Bibliográficos
Autores principales: Dado, Shlomo, Dar, Arnon
Lenguaje:eng
Publicado: 2008
Materias:
Acceso en línea:https://dx.doi.org/10.1088/0004-637X/693/1/311
http://cds.cern.ch/record/1115118
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author Dado, Shlomo
Dar, Arnon
author_facet Dado, Shlomo
Dar, Arnon
author_sort Dado, Shlomo
collection CERN
description Long duration gamma ray bursts (GRBs) and X-ray flashes (XRFs) are produced by highly- relativistic jets ejected in core-collapse supernova explosions. The origin of short hard gamma-ray bursts (SHBs) has not been established. They may be produced by highly relativistic jets ejected in various processes: mergers of compact stellar objects; large-mass accretion episodes onto compact stars in close binaries or onto intermediate-mass black holes in dense stellar regions; phase transition of compact stars. Natural environments of such events are the dense cores of globular clusters, superstar clusters and young supernova remnants. We have used the cannonball model of GRBs to analyze all Swift SHBs with a well-sampled X-ray afterglow. We show that their prompt gamma-ray emission can be explained by inverse Compton scattering (ICS) of the progenitor's glory light, and their extended soft emission component by ICS of high density light or synchrotron radiation (SR) in a high density interstellar medium within the cluster. The mechanism generating the afterglow is synchrotron radiation outside the cluster. No associated supernova could be detected in the low luminosity nearby GRBs 060614 and 060505. We interpret them as SHBs seen relatively far off axis.
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spelling cern-11151182019-09-30T06:29:59Zdoi:10.1088/0004-637X/693/1/311http://cds.cern.ch/record/1115118engDado, ShlomoDar, ArnonShort Hard Gamma Ray Bursts And Their AfterglowsAstrophysics and AstronomyLong duration gamma ray bursts (GRBs) and X-ray flashes (XRFs) are produced by highly- relativistic jets ejected in core-collapse supernova explosions. The origin of short hard gamma-ray bursts (SHBs) has not been established. They may be produced by highly relativistic jets ejected in various processes: mergers of compact stellar objects; large-mass accretion episodes onto compact stars in close binaries or onto intermediate-mass black holes in dense stellar regions; phase transition of compact stars. Natural environments of such events are the dense cores of globular clusters, superstar clusters and young supernova remnants. We have used the cannonball model of GRBs to analyze all Swift SHBs with a well-sampled X-ray afterglow. We show that their prompt gamma-ray emission can be explained by inverse Compton scattering (ICS) of the progenitor's glory light, and their extended soft emission component by ICS of high density light or synchrotron radiation (SR) in a high density interstellar medium within the cluster. The mechanism generating the afterglow is synchrotron radiation outside the cluster. No associated supernova could be detected in the low luminosity nearby GRBs 060614 and 060505. We interpret them as SHBs seen relatively far off axis.arXiv:0807.1962oai:cds.cern.ch:11151182008-07-15
spellingShingle Astrophysics and Astronomy
Dado, Shlomo
Dar, Arnon
Short Hard Gamma Ray Bursts And Their Afterglows
title Short Hard Gamma Ray Bursts And Their Afterglows
title_full Short Hard Gamma Ray Bursts And Their Afterglows
title_fullStr Short Hard Gamma Ray Bursts And Their Afterglows
title_full_unstemmed Short Hard Gamma Ray Bursts And Their Afterglows
title_short Short Hard Gamma Ray Bursts And Their Afterglows
title_sort short hard gamma ray bursts and their afterglows
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1088/0004-637X/693/1/311
http://cds.cern.ch/record/1115118
work_keys_str_mv AT dadoshlomo shorthardgammarayburstsandtheirafterglows
AT dararnon shorthardgammarayburstsandtheirafterglows