On the origin of galactic cosmic rays

Abstract

It is shown that the relativistic jet, emitted from the center of the Galaxy during its activity, possessed power and energy spectrum of accelerated protons sufficient to explain the current cosmic rays distribution in the Galaxy. Proton acceleration takes place on the light cylinder surface formed by the rotation of a massive black hole carring into rotation the radial magnetic field and the magnetosphere. Observed in gamma, x-ray and radio bands bubbles above and below the galactic plane can be remnants of this bipolar get. The size of the bubble defines the time of the jet's start, $\simeq 2.4\cdot 10^7$ years ago. The jet worked more than $10^7$ years, but less than $2.4\cdot 10^7$ years.

15 pages, 5 figures

References in corpus (2)

• Giant Gamma-ray Bubbles from Fermi-LAT: AGN Activity or Bipolar Galactic Wind?
• The Fermi Bubbles: Giant, Multi-Billion-Year-Old Reservoirs of Galactic Center Cosmic Rays

Cited by in corpus (8)

• Acceleration of petaelectronvolt protons in the Galactic Centre
• Sensitivity of the Cherenkov Telescope Array to spectral signatures of hadronic PeVatrons with application to Galactic Supernova Remnants
• Pevatron at the Galactic Center: Multi-Wavelength Signatures from Millisecond Pulsars
• On the Galactic Center Being the Main Source of Galactic Cosmic Rays as Evidenced by Recent Cosmic Ray and Gamma Ray Observations
• The Important Role of Cosmic-Ray Re-Acceleration
• Ultra high energy cosmic rays from past activity of Andromeda galaxy
• The expected potential of hadronic PeVatron searches with spectral $\gamma$-ray data from the Southern Wide-field Gamma-ray Observatory
• On the high-energy protons regular acceleration in the Fermi Bubbles