The role of supernovae inside AGN jets in UHECR acceleration

Context. Jets of active galactic nuclei are potential accelerators of ultra high-energy cosmic rays. Supernovae can occur inside these jets and contribute to cosmic ray acceleration, particularly of heavy nuclei, but that contribution has been hardly investigated so far. Aims. We carried out a first...

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Detalles Bibliográficos
Autor: Bosch i Ramon, Valentí
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/210204
Acceso en línea:https://hdl.handle.net/2445/210204
Access Level:acceso abierto
Palabra clave:Raigs còsmics
Nucli galàctic actiu
Galàxies
Cosmic rays
Active galactic nuclei
Galaxies
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spelling The role of supernovae inside AGN jets in UHECR accelerationBosch i Ramon, ValentíRaigs còsmicsNucli galàctic actiuGalàxiesCosmic raysActive galactic nucleiGalaxiesContext. Jets of active galactic nuclei are potential accelerators of ultra high-energy cosmic rays. Supernovae can occur inside these jets and contribute to cosmic ray acceleration, particularly of heavy nuclei, but that contribution has been hardly investigated so far. Aims. We carried out a first dedicated exploration of the role of supernovae inside extragalactic jets in the production of ultra high-energy cosmic rays. Methods. We characterized the energy budget of supernova-jet interactions, and the maximum possible energies of the particles accelerated in those events, likely dominated by heavy nuclei. This allowed us to assess whether these interactions can be potential acceleration sites of ultra high-energy cosmic rays, or at least of their seeds. For that, we estimated the cosmic ray luminosity for different galaxy types, and compared the injection rate of cosmic ray seeds into the jet with that due to galactic cosmic ray entrainment. Results. Since the supernova is fueled for a long time by the luminosity of the jet, the energy of a supernova-jet interaction can be several orders of magnitude greater than that of an isolated supernova. Thus, despite the low rate of supernovae expected to occur in the jet, they could still provide more seeds for accelerating ultra high-energy particles than cosmic ray entrainment from the host galaxy. Moreover, these interactions can create sufficiently efficient accelerators to be a source of cosmic rays with energies ≳10 EeV. Conclusions. Supernova-jet interactions can contribute significantly to the production of ultra high-energy cosmic rays, either directly by accelerating these particles themselves or indirectly by providing pre-accelerated seeds.EDP Sciences2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/210204Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1051/0004-6361/202347554Astronomy & Astrophysics, 2023, vol. 677, p. 14-17https://doi.org/10.1051/0004-6361/202347554(c) The European Southern Observatory (ESO), 2023info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2102042026-05-27T06:46:51Z
dc.title.none.fl_str_mv The role of supernovae inside AGN jets in UHECR acceleration
title The role of supernovae inside AGN jets in UHECR acceleration
spellingShingle The role of supernovae inside AGN jets in UHECR acceleration
Bosch i Ramon, Valentí
Raigs còsmics
Nucli galàctic actiu
Galàxies
Cosmic rays
Active galactic nuclei
Galaxies
title_short The role of supernovae inside AGN jets in UHECR acceleration
title_full The role of supernovae inside AGN jets in UHECR acceleration
title_fullStr The role of supernovae inside AGN jets in UHECR acceleration
title_full_unstemmed The role of supernovae inside AGN jets in UHECR acceleration
title_sort The role of supernovae inside AGN jets in UHECR acceleration
dc.creator.none.fl_str_mv Bosch i Ramon, Valentí
author Bosch i Ramon, Valentí
author_facet Bosch i Ramon, Valentí
author_role author
dc.subject.none.fl_str_mv Raigs còsmics
Nucli galàctic actiu
Galàxies
Cosmic rays
Active galactic nuclei
Galaxies
topic Raigs còsmics
Nucli galàctic actiu
Galàxies
Cosmic rays
Active galactic nuclei
Galaxies
description Context. Jets of active galactic nuclei are potential accelerators of ultra high-energy cosmic rays. Supernovae can occur inside these jets and contribute to cosmic ray acceleration, particularly of heavy nuclei, but that contribution has been hardly investigated so far. Aims. We carried out a first dedicated exploration of the role of supernovae inside extragalactic jets in the production of ultra high-energy cosmic rays. Methods. We characterized the energy budget of supernova-jet interactions, and the maximum possible energies of the particles accelerated in those events, likely dominated by heavy nuclei. This allowed us to assess whether these interactions can be potential acceleration sites of ultra high-energy cosmic rays, or at least of their seeds. For that, we estimated the cosmic ray luminosity for different galaxy types, and compared the injection rate of cosmic ray seeds into the jet with that due to galactic cosmic ray entrainment. Results. Since the supernova is fueled for a long time by the luminosity of the jet, the energy of a supernova-jet interaction can be several orders of magnitude greater than that of an isolated supernova. Thus, despite the low rate of supernovae expected to occur in the jet, they could still provide more seeds for accelerating ultra high-energy particles than cosmic ray entrainment from the host galaxy. Moreover, these interactions can create sufficiently efficient accelerators to be a source of cosmic rays with energies ≳10 EeV. Conclusions. Supernova-jet interactions can contribute significantly to the production of ultra high-energy cosmic rays, either directly by accelerating these particles themselves or indirectly by providing pre-accelerated seeds.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/210204
url https://hdl.handle.net/2445/210204
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1051/0004-6361/202347554
Astronomy & Astrophysics, 2023, vol. 677, p. 14-17
https://doi.org/10.1051/0004-6361/202347554
dc.rights.none.fl_str_mv (c) The European Southern Observatory (ESO), 2023
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The European Southern Observatory (ESO), 2023
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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