Effect of nearby supernova remnants on local Cosmic-Rays

Abstract

We study in detail the effect of different particle release times from sources on the cosmic-ray (CR) spectrum below $10^{15}eV$ in the Galaxy. We discuss different possible forms of particle injection such as burst-like injection, continuous injection for a finite time, injection from a stationary source and energy dependent injection. When applied to the nearby known supernova remnants, we find that the observed CR anisotropy data favour the burst-like particle injection model for the CR diffusion coefficient $D(E)\propto E^a$ with $a=0.3-0.6$ in the local region. In the study we have also found that the contribution of the sources G114.3+0.3 and Monogem dominate if the observed anisotropy is a result of the effect of the nearby sources. Further study shows that we should not neglect the contribution of the undetected old sources to the local CR anisotropy.

arXiv comment7 pages, 3 figures, MNRAS accepted, minor text corrections

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Cited by in corpus (5)

• Nearby supernova remnants and the cosmic-ray spectral hardening at high energies
• On the contribution of nearby sources to the observed cosmic-ray nuclei
• Spatially decomposed $\gamma$-ray features surrounding SNR Kes 79 & PSR J1853+0056
• Revisiting the effect of nearby supernova remnants on local cosmic rays
• The contribution of nearby supernova remnants on the cosmic ray flux at Earth