Direct Numerical Simulations of Cosmic-ray Acceleration at Dense Circumstellar Medium: Magnetic-field Amplification and Maximum Energy

@article{Inoue2021DirectNS,
  title={Direct Numerical Simulations of Cosmic-ray Acceleration at Dense Circumstellar Medium: Magnetic-field Amplification and Maximum Energy},
  author={Tsuyoshi Inoue and Alexandre Marcowith and Gwenael Giacinti and Allard Jan van Marle and Sho Nishino},
  journal={The Astrophysical Journal},
  year={2021},
  volume={922}
}
Galactic cosmic rays are believed to be accelerated at supernova remnants. However, whether supernova remnants can be PeV is still very unclear. In this work we argue that PeV cosmic rays can be accelerated during the early phase of a supernova blast-wave expansion in dense red supergiant winds. We solve in spherical geometry a system combining a diffusive–convection equation that treats cosmic-ray dynamics coupled to magnetohydrodynamics to follow gas dynamics. A fast shock expanding in a… 

Diffusive Shock Acceleration at Oblique High Mach Number Shocks

The current paradigm of cosmic-ray (CR) origin states that the greater part of galactic CRs is produced by supernova remnants. The interaction of supernova ejecta with the interstellar medium after a

Escape of cosmic rays from perpendicular shocks in the circumstellar magnetic field

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Long-term Evolution of Nonthermal Emission from Type Ia and Core-collapse Supernova Remnants in a Diversified Circumstellar Medium

The contribution of galactic supernova remnants (SNRs) to the origin of cosmic rays (CRs) is an important open question in modern astrophysics. Broadband nonthermal emission is a useful proxy for

Observational Constraints on the Maximum Energies of Accelerated Particles in Supernova Remnants: Low Maximum Energies and a Large Variety

Supernova remnants (SNRs) are thought to be the most promising sources of Galactic cosmic rays. One of the principal questions is whether they are accelerating particles up to the maximum energy of

The origin of galactic cosmic rays

Thanks to advances in $$\gamma$$ γ -ray astronomy and precise measurements of cosmic ray (CR) properties, the last decade has witnessed significant progresses in our understanding of the origin of

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