Ultrahigh-energy cosmic ray production by turbulence in gamma-ray burst jets and cosmogenic neutrinos

2016/07/09 by Katsuaki Asano, P. Mészáros, Peter Meszaros · 34 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #COSMIC cancer database #Cosmic ray #Gamma-ray burst #Gamma-ray bursts and supernovae #Meteorology #Neutrino #Neutrino Physics Research #Nuclear physics #Physics #Turbulence #astro-ph.HE

paper · pdf · doi:10.1103/physrevd.94.023005

published in Physical review. D/Physical review. D. 94(2) (American Physical Society) · 9 pages, 5 figuers, accepted for publication in Physical Review D

arxiv created 2016/07/09 · openalex publication_date 2016/07/13 · arxiv updated 2016/08/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We propose a novel model to produce ultrahigh-energy cosmic rays (UHECRs) in gamma-ray burst jets. After the prompt gamma-ray emission, hydrodynamical turbulence is excited in the GRB jets at or before the afterglow phase. The mildly relativistic turbulence stochastically accelerates protons. The acceleration rate is much slower than the usual first-order shock acceleration rate, but in this case it can be energy independent. The resultant UHECR spectrum is so hard that the bulk energy is concentrated in the highest energy range, resulting in a moderate requirement for the typical cosmic-ray luminosity of \ensuremath∼10^53.5 erg s^\ensuremath-1. In this model, the secondary gamma-ray and neutrino emissions initiated by photopion production are significantly suppressed. Although the UHECR spectrum at injection shows a curved feature, this does not conflict with the observed UHECR spectral shape. The cosmogenic neutrino spectrum in the 10¹⁷--10¹⁸ eV range becomes distinctively hard in this model, which may be verified by future observations.

Citations

• ANGULAR ENERGY DISTRIBUTION OF COLLAPSAR-JETS
• Time‐dependent Stochastic Particle Acceleration in Astrophysical Plasmas: Exact Solutions Including Momentum‐dependent Escape
• On the Momentum Diffusion of Radiating Ultrarelativistic Electrons in a Turbulent Magnetic Field
• High-energy cosmic-ray nuclei from high- and low-luminosity gamma-ray bursts and implications for multimessenger astronomy
• Implications to sources of ultra-high-energy cosmic rays from their arrival distribution
• Unstable GRB Photospheres and e ± Annihilation Lines
• High Energy Neutrino Flashes from Far-Ultraviolet and X-Ray Flares in Gamma-Ray Bursts
• Particle acceleration at astrophysical shocks: A theory of cosmic ray origin

Cited by

• Adiabatic Non-resonant Acceleration in Magnetic Turbulence and Hard Spectra of Gamma-Ray Bursts