PeV Cosmic Ray Acceleration in the Supernova Post Breakout Expansion Phase: Kinetic-magnetohydrodynamic Simulations


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  • uploaded June 25, 2021

Discussion timeslot (ZOOM-Meeting): 16. July 2021 - 12:00
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ZOOM-Meeting ID: 92210078166
ZOOM-Meeting Passcode: ICRC2021
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'Origin of cosmic rays (CRs) is still not known. 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 which treats CR dynamics coupled to magnetohydrodynamics to follow gas dynamics. The fast shock expanding in a dense ionized wind is able to trigger the fast non-resonant streaming instability over day timescales. We investigate the maximum energy CRs can reach in this configuration accounting for pp losses. Multi-PeV energies can be reached if the progenitor mass loss rates are of the order of, or larger than, $10^{-3}$ solar masses/year. It has been recently invoked that prior to the explosion hydrogen rich massive stars can produce enhanced mass loss rates. These enhanced rates would then favor the production of a Pevatron phase in early times after the shock breakout. We discuss observational tests to probe our model using future radio and gamma-ray facilities.'

Authors: Tsuyoshi Inoue | Alexandre Marcowith | Gwenael Giacinti
Indico-ID: 387
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Categories: Astroparticle Physics
Presenter: Tsuyoshi Inoue

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