Where are the Pevatrons that Form the Knee in the Spectrum of the Cosmic Ray Nucleon Component around 4 PeV?

Abstract

The paper discusses an approach that made it possible to estimate the distance to the nearest pevatrons, which form a knee in the spectrum of the cosmic ray nucleon component of about $4$ PeV. It is based on the spectra of nucleons and electrons obtained by the authors in the framework of the superdiffusion model of nonclassical cosmic rays diffusion, which have a knee, on the assumption that nucleons and electrons are accelerated by the same type sources and their propagation in an inhomogeneous turbulent galactic medium is characterized by the same diffusion coefficient, and also on the knee in the spectrum of the electronic component in the region of $0.9$ TeV, established in the DAMPE experiment. It is shown that pevatrons, which form a knee in the spectrum of the cosmic ray nucleon component of about $4$ PeV, are located at distances of the order of $0.75$ kpc from the Earth.

12 pages, 3 figures, 2 tables, The 4th International Symposium on Cosmic Rays and Astrophysics (ISCRA-2023)

References in corpus (7)

• Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
• The Hunt for Pevatrons: The Case of Supernova Remnants
• Massive star cluster origin for the galactic cosmic ray population at very-high energies
• Parameter estimation of superdiffusive motion of energetic particles upstream of heliospheric shocks
• Klein-Nishina effect and the cosmic ray electron spectrum
• Non-linear weak lensing forecasts
• The LHAASO PeVatron bright sky: what we learned