Grammage of cosmic rays in the proximity of supernova remnants embedded in a partially ionized medium - Archive ouverte HAL
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2022

Grammage of cosmic rays in the proximity of supernova remnants embedded in a partially ionized medium

S. Recchia
  • Fonction : Auteur
D. Galli
  • Fonction : Auteur
L. Nava
M. Padovani
  • Fonction : Auteur
S. Gabici
  • Fonction : Auteur
AstroParticule et Cosmologie
A. Marcowith
Laboratoire Univers et Particules de Montpellier
V. Ptuskin
  • Fonction : Auteur
G. Morlino
  • Fonction : Auteur

Résumé

Aims. We investigate the damping of Alfvén waves generated by the cosmic-ray resonant streaming instability in the context of cosmic-ray escape and propagation in the proximity of supernova remnants. We study in particular whether the self-confinement of cosmic rays in the vicinity of sources can appreciably affect the grammage. Methods. We considered ion-neutral damping, turbulent damping, and nonlinear Landau damping in the warm ionized and warm neutral phases of the interstellar medium. For the ion-neutral damping, the most recent damping coefficients were used. Results. We show that ion-neutral damping and turbulent damping effectively limit the residence time of cosmic rays in the proximity of the source, so that the grammage that is accumulated near sources is found to be negligible. In contrast to previous results, this also occurs in the most extreme scenario in which ion-neutral damping is less effective, namely in a medium consisting only of neutral helium and fully ionized hydrogen. The standard picture, in which cosmic-ray secondaries are produced during the whole time that cosmic rays spend in the Galactic disk therefore do not need to be revised substantially.

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Astrophysique [astro-ph]
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Soumis le : lundi 11 mars 2024-09:50:40

Dernière modification le : jeudi 7 novembre 2024-16:14:04

Archivage à long terme le : mercredi 12 juin 2024-18:21:15

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hal-03675587 , version 1 (11-03-2024)

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S. Recchia, D. Galli, L. Nava, M. Padovani, S. Gabici, et al.. Grammage of cosmic rays in the proximity of supernova remnants embedded in a partially ionized medium. Astronomy and Astrophysics - A&A, 2022, 660, pp.A57. ⟨10.1051/0004-6361/202142558⟩. ⟨hal-03675587⟩

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