Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime

Autores
Mollerach, Maria Silvia; Roulet, Esteban
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We study the effects that the diffusion of cosmic rays in the magnetic field of the Local Supercluster can have on the spectrum of a nearby extragalactic source at ultrahigh energies. We find that the strong enhancement of the flux below the energy at which the transition between the diffusive and quasirectilinear regimes takes place, as well as the suppression at lower energies associated with a finite source age, can help to explain the observed features of the cosmic-ray spectrum and composition. Scenarios are discussed in which a nearby extragalactic source with mixed composition and a rigidity-dependent spectrum accounts for most of the observed cosmic rays at energies above a few EeV, while the rest of the extragalactic sources lead to a diffuse flux that dominates at lower energies and down to ∼0.1 EeV. The nearby source can also naturally account for the dipolar anisotropy measurements above 4 EeV, and these measurements can also help to constrain its evolution with redshift.
Fil: Mollerach, Maria Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Roulet, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Materia
RAYOS CÓSMICOS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/116359
Acceder
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spelling Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regimeMollerach, Maria SilviaRoulet, EstebanRAYOS CÓSMICOShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We study the effects that the diffusion of cosmic rays in the magnetic field of the Local Supercluster can have on the spectrum of a nearby extragalactic source at ultrahigh energies. We find that the strong enhancement of the flux below the energy at which the transition between the diffusive and quasirectilinear regimes takes place, as well as the suppression at lower energies associated with a finite source age, can help to explain the observed features of the cosmic-ray spectrum and composition. Scenarios are discussed in which a nearby extragalactic source with mixed composition and a rigidity-dependent spectrum accounts for most of the observed cosmic rays at energies above a few EeV, while the rest of the extragalactic sources lead to a diffuse flux that dominates at lower energies and down to ∼0.1 EeV. The nearby source can also naturally account for the dipolar anisotropy measurements above 4 EeV, and these measurements can also help to constrain its evolution with redshift.Fil: Mollerach, Maria Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Roulet, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaAmerican Physical Society2019-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/116359Mollerach, Maria Silvia; Roulet, Esteban; Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime; American Physical Society; Physical Review D; 99; 10; 5-2019; 1-18; 1030102470-00102470-0029CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.99.103010info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.99.103010info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1903.05722info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:08:56Zoai:ri.conicet.gov.ar:11336/116359instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:08:56.868CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime
title Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime
spellingShingle Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime
Mollerach, Maria Silvia
RAYOS CÓSMICOS
title_short Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime
title_full Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime
title_fullStr Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime
title_full_unstemmed Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime
title_sort Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime
dc.creator.none.fl_str_mv Mollerach, Maria Silvia
Roulet, Esteban
author Mollerach, Maria Silvia
author_facet Mollerach, Maria Silvia
Roulet, Esteban
author_role author
author2 Roulet, Esteban
author2_role author
dc.subject.none.fl_str_mv RAYOS CÓSMICOS
topic RAYOS CÓSMICOS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We study the effects that the diffusion of cosmic rays in the magnetic field of the Local Supercluster can have on the spectrum of a nearby extragalactic source at ultrahigh energies. We find that the strong enhancement of the flux below the energy at which the transition between the diffusive and quasirectilinear regimes takes place, as well as the suppression at lower energies associated with a finite source age, can help to explain the observed features of the cosmic-ray spectrum and composition. Scenarios are discussed in which a nearby extragalactic source with mixed composition and a rigidity-dependent spectrum accounts for most of the observed cosmic rays at energies above a few EeV, while the rest of the extragalactic sources lead to a diffuse flux that dominates at lower energies and down to ∼0.1 EeV. The nearby source can also naturally account for the dipolar anisotropy measurements above 4 EeV, and these measurements can also help to constrain its evolution with redshift.
Fil: Mollerach, Maria Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Roulet, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
description We study the effects that the diffusion of cosmic rays in the magnetic field of the Local Supercluster can have on the spectrum of a nearby extragalactic source at ultrahigh energies. We find that the strong enhancement of the flux below the energy at which the transition between the diffusive and quasirectilinear regimes takes place, as well as the suppression at lower energies associated with a finite source age, can help to explain the observed features of the cosmic-ray spectrum and composition. Scenarios are discussed in which a nearby extragalactic source with mixed composition and a rigidity-dependent spectrum accounts for most of the observed cosmic rays at energies above a few EeV, while the rest of the extragalactic sources lead to a diffuse flux that dominates at lower energies and down to ∼0.1 EeV. The nearby source can also naturally account for the dipolar anisotropy measurements above 4 EeV, and these measurements can also help to constrain its evolution with redshift.
publishDate 2019
dc.date.none.fl_str_mv 2019-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/116359
Mollerach, Maria Silvia; Roulet, Esteban; Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime; American Physical Society; Physical Review D; 99; 10; 5-2019; 1-18; 103010
2470-0010
2470-0029
CONICET Digital
CONICET
url http://hdl.handle.net/11336/116359
identifier_str_mv Mollerach, Maria Silvia; Roulet, Esteban; Ultrahigh energy cosmic rays from a nearby extragalactic source in the diffusive regime; American Physical Society; Physical Review D; 99; 10; 5-2019; 1-18; 103010
2470-0010
2470-0029
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.99.103010
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.99.103010
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1903.05722
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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