Can Ultrahigh Energy Cosmic Rays Come from Gamma-Ray Bursts? II: Cosmic Rays Below the Ankle and Galactic GRB

Abstract

The maximum cosmic ray energy achievable by acceleration by a relativistic blast wave is derived. It is shown that forward shocks from long GRB in the interstellar medium are powerful enough to produce the Galactic cosmic-ray component up to the ankle at $4\times 10^{18}$eV, as per an earlier suggestion (Levinson and Eichler, 1993). It is further argued that, were extragalactic long GRB responsible for the component {\it above} the ankle as well, the contribution from an occasional Galactic GRB within the solar circle would yield more than the observational limits on the outward flux from the solar circle, unless intermittency and/or beaming causes the present-day contribution to be less than $10^{-3}$ times the time average, and difficulties with these avoidance scenarios are also noted.

References in corpus (2)

• Search for First Harmonic Modulation in the Right Ascension Distribution of Cosmic Rays Detected at the Pierre Auger Observatory
• The High Energy Budget Allocations in Shocks and GRB

Cited by in corpus (11)

• Relativistic Shocks: Particle Acceleration and Magnetization
• Particle acceleration in relativistic outflows
• Particle acceleration in astrophysical jets
• Ultrahigh Energy Cosmic Ray Nuclei from Extragalactic Pulsars and the effect of their Galactic counterparts
• Cosmic-ray-induced ionization in molecular clouds adjacent to supernova remnants - Tracing the hadronic origin of GeV gamma radiation
• On ultra high energy cosmic rays and their resultant gamma rays
• Origin of Ultrahigh Energy Galactic Cosmic Rays: The Isotropy Problem
• The isotropy problem of Sub-ankle Ultra-high energy cosmic rays
• Ultrahigh Energy Cosmic Rays: A Galactic Origin?
• The average GeV-band Emission from Gamma-Ray Bursts
• Relativistic shock acceleration and some consequences