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Durham University

Department of Physics

Staff profile

Publication details for Prof Sir Arnold Wolfendale

Erlykin, AD & Wolfendale, AW (2003). High-energy cosmic gamma rays from the 'single source'. Journal Of Physics G-nuclear And Particle Physics 29(4): 709-718.
  • Publication type: Journal Article
  • ISSN/ISBN: 0954-3899
  • Keywords: SUPERNOVA-REMNANTS; INTERSTELLAR-MEDIUM; ORIGIN; RADIATION; SPECTRUM;KNEE

Author(s) from Durham

Abstract

Some six years ago, we (Erlykin A D and Wolfendale A W 1997 J. Phys. G:
Nucl. Part. Phys. 23.979) proposed the 'single-source (SS) model' in
which a local, recent supernova remnant (SNR) was responsible for the
'knee' in the cosmic-ray (CR) energy spectrum at similar to3 PeV.
Stimulated by the paper by Bhadra (Bhadra A 2002 J. Phys. G: Nucl.
Part. Phys. 28 397), which drew attention to a possible gamma-ray
signature of this local remnant, we now study the situation for the
local source, and conclude that, in contrast to Bhadra's conclusion,
the non-observation of this remnant is understandable-at least using
our SNR model. It is due to the fact that this SNR, being local,
develops in the local hot interstellar medium (HISM) with its low
density of gas and also being nearby it will be an extended source
occupying up to 40degrees of the sky and thus indistinguishable from
the background.