Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum

Autores
Candia, Julián Marcelo; Roulet, Esteban; Epele, Luis Nicolás
Año de publicación
2002
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We reconsider the scenario in which the knee in the cosmic ray spectrum is explained as due to a change in the escape mechanism of cosmic rays from the galaxy from one dominated by transverse diffusion to one dominated by drifts. We solve the diffusion equations adopting realistic galactic field models and using diffusion coefficients appropriate for strong turbulence (with a Kolmogorov spectrum of fluctuations) and consistent with the assumed magnetic fields. We show that properly taking into account these effects leads to a natural explanation of the knee in the spectrum, and a transition towards a heavier composition above the knee is predicted.
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Física
Integrable Equations in Physics
High Energy Cosmic Rays
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/128442
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/128442
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrumCandia, Julián MarceloRoulet, EstebanEpele, Luis NicolásCiencias ExactasFísicaIntegrable Equations in PhysicsHigh Energy Cosmic RaysWe reconsider the scenario in which the knee in the cosmic ray spectrum is explained as due to a change in the escape mechanism of cosmic rays from the galaxy from one dominated by transverse diffusion to one dominated by drifts. We solve the diffusion equations adopting realistic galactic field models and using diffusion coefficients appropriate for strong turbulence (with a Kolmogorov spectrum of fluctuations) and consistent with the assumed magnetic fields. We show that properly taking into account these effects leads to a natural explanation of the knee in the spectrum, and a transition towards a heavier composition above the knee is predicted.Facultad de Ciencias Exactas2002-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/128442enginfo:eu-repo/semantics/altIdentifier/issn/1029-8479info:eu-repo/semantics/altIdentifier/arxiv/astro-ph/0206336info:eu-repo/semantics/altIdentifier/doi/10.1088/1126-6708/2002/12/033info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:30:58Zoai:sedici.unlp.edu.ar:10915/128442Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:30:58.923SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum
title Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum
spellingShingle Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum
Candia, Julián Marcelo
Ciencias Exactas
Física
Integrable Equations in Physics
High Energy Cosmic Rays
title_short Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum
title_full Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum
title_fullStr Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum
title_full_unstemmed Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum
title_sort Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum
dc.creator.none.fl_str_mv Candia, Julián Marcelo
Roulet, Esteban
Epele, Luis Nicolás
author Candia, Julián Marcelo
author_facet Candia, Julián Marcelo
Roulet, Esteban
Epele, Luis Nicolás
author_role author
author2 Roulet, Esteban
Epele, Luis Nicolás
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Física
Integrable Equations in Physics
High Energy Cosmic Rays
topic Ciencias Exactas
Física
Integrable Equations in Physics
High Energy Cosmic Rays
dc.description.none.fl_txt_mv We reconsider the scenario in which the knee in the cosmic ray spectrum is explained as due to a change in the escape mechanism of cosmic rays from the galaxy from one dominated by transverse diffusion to one dominated by drifts. We solve the diffusion equations adopting realistic galactic field models and using diffusion coefficients appropriate for strong turbulence (with a Kolmogorov spectrum of fluctuations) and consistent with the assumed magnetic fields. We show that properly taking into account these effects leads to a natural explanation of the knee in the spectrum, and a transition towards a heavier composition above the knee is predicted.
Facultad de Ciencias Exactas
description We reconsider the scenario in which the knee in the cosmic ray spectrum is explained as due to a change in the escape mechanism of cosmic rays from the galaxy from one dominated by transverse diffusion to one dominated by drifts. We solve the diffusion equations adopting realistic galactic field models and using diffusion coefficients appropriate for strong turbulence (with a Kolmogorov spectrum of fluctuations) and consistent with the assumed magnetic fields. We show that properly taking into account these effects leads to a natural explanation of the knee in the spectrum, and a transition towards a heavier composition above the knee is predicted.
publishDate 2002
dc.date.none.fl_str_mv 2002-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/128442
url http://sedici.unlp.edu.ar/handle/10915/128442
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1029-8479
info:eu-repo/semantics/altIdentifier/arxiv/astro-ph/0206336
info:eu-repo/semantics/altIdentifier/doi/10.1088/1126-6708/2002/12/033
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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