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

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 mod...

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Detalles Bibliográficos
Autores principales: Candia, Julián Marcelo, Roulet, Esteban, Epele, Luis Nicolás
Formato: Articulo
Lenguaje:Inglés
Publicado: 2002
Materias:
Ciencias Exactas
Física
Integrable Equations in Physics
High Energy Cosmic Rays
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/128442
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-128442
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Integrable Equations in Physics
High Energy Cosmic Rays
spellingShingle Ciencias Exactas
Física
Integrable Equations in Physics
High Energy Cosmic Rays
Candia, Julián Marcelo
Roulet, Esteban
Epele, Luis Nicolás
Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum
topic_facet Ciencias Exactas
Física
Integrable Equations in Physics
High Energy Cosmic Rays
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.
format Articulo
Articulo
author Candia, Julián Marcelo
Roulet, Esteban
Epele, Luis Nicolás
author_facet Candia, Julián Marcelo
Roulet, Esteban
Epele, Luis Nicolás
author_sort Candia, Julián Marcelo
title Turbulent diffusion and drift in galactic magnetic fields and the explanation of the knee in the cosmic ray spectrum
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
publishDate 2002
url http://sedici.unlp.edu.ar/handle/10915/128442
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AT rouletesteban turbulentdiffusionanddriftingalacticmagneticfieldsandtheexplanationofthekneeinthecosmicrayspectrum
AT epeleluisnicolas turbulentdiffusionanddriftingalacticmagneticfieldsandtheexplanationofthekneeinthecosmicrayspectrum
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