Cosmic ray acceleration in supernova remnants and the FERMI/PAMELA data

2009/09/30 by Markus Ahlers, M. Ahlers, Philipp Mertsch +2 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Context (archaeology) #Cosmic ray #Dark Matter and Cosmic Phenomena #Electron #Fermi Gamma-ray Space Telescope #Galaxy #Gamma ray #Hadron #Neutrino #Neutrino Physics Research #Nuclear physics #Particle acceleration #Physics #Pion #Positron #Supernova #astro-ph.GA #astro-ph.HE #hep-ph

paper · pdf · doi:10.1103/physrevd.80.123017

published as Phys.Rev.D80:123017,2009 · 13 pages, 8 figures (ReVTeX 4); Clarifying comments added; Revised prediction for B/C added (new Fig.8); References added; To appear in Phys. Rev. D

arxiv created 2009/12/08 · openalex publication_date 2009/12/29 · arxiv updated 2014/11/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We discuss recent observations of high energy cosmic ray positrons and electrons in the context of hadronic interactions in supernova remnants (SNRs), the suspected accelerators of galactic cosmic rays. Diffusive shock acceleration can harden the energy spectrum of secondary positrons relative to that of the primary protons and electrons and thus explain the rise in the positron fraction observed by PAMELA above 10 GeV. We normalize the hadronic interaction rate by holding pion decay to be responsible for the gamma rays detected by HESS from some SNRs. By simulating the spatial and temporal distribution of SNRs in the Galaxy according to their known statistics, we are able to then fit the electron (plus positron) energy spectrum measured by Fermi. It appears that IceCube has good prospects for detecting the hadronic neutrino fluxes expected from nearby SNRs.

Citations

• Primary particle acceleration above 100 TeV in the shell-type supernova remnant RX J1713.7-3946 with deep HESS observations
• Neutrinos from galactic sources of cosmic rays with known γ-ray spectra
• Prospects for identifying the sources of the Galactic cosmic rays with IceCube
• Expected neutrino signal from supernova remnant RX J1713.7-3946 and flavor oscillations
• Pulsars as the sources of high energy cosmic ray positrons
• Particle acceleration at astrophysical shocks: A theory of cosmic ray origin
• Is the PAMELA anomaly caused by supernova explosions near the Earth?
• How precisely can neutrino emission from supernova remnants be constrained by gamma ray observations?
• Cosmic-Ray Propagation and Interactions in the Galaxy
• Energy Spectrum of Cosmic-Ray Electrons at TeV Energies
• Dark matter candidates
• A detailed spectral and morphological study of the gamma-ray supernova remnant RX J1713.7–3946 with HESS
• Measurements of cosmic-ray secondary nuclei at high energies with the first flight of the CREAM balloon-borne experiment

Cited by

• Implications of the AMS-02 positron fraction in cosmic rays