Cosmic ray self-confinement close to extragalactic sources
Journal
Date Issued
2015
Author(s)
Abstract
Most models of the origin of ultra high energy cosmic rays rely on the existence of luminous
extragalactic sources. Cosmic rays escaping the galaxy where the source is located produce a suf-
ficiently large electric current to justify the investigation of plasma instabilities induced by such
current. Most interesting is the excitation of modes that lead to production of magnetic perturba-
tions that may scatter particles thereby hindering their escape, or at least changing the propagation
mode of escaping cosmic rays. We argue that self-generation of waves may force cosmic rays to
be confined in the source proximity for energies $E<10^7\ L_{44}^{23}$ GeV for low background magnetic fields ($B_0 \ll$ nG). For larger values of $B_0$, cosmic rays are confined close to their sources for energies $E < 2 \times 10^8\ \lambda_{10}\ L_{44}^{1/4} B_{-10}^{1/2}$ GeV, where $B_{-10}$ is the field in units of 0.1 nG, $\lambda_{10}$ is its coherence length in units of 10 Mpc and $L_{44}$ is the source luminosity in units of $10^{44}$ erg/s.
Coverage
34th International Cosmic Ray Conference (ICRC2015)
Volume
34
Start page
505
Conferenece
34th International Cosmic Ray Conference (ICRC2015)
Conferenece place
The Hague, The Netherlands
Conferenece date
30 July - 6 August, 2015
Issn Identifier
1824-8039
Ads BibCode
2015ICRC...34..505B
Rights
open.access
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