Numerical Simulations of Cosmic-Ray Acceleration at Core-Collapse Supernovae

Gwenael Giacinti , Vikram Dwarkadas , Alexandre Marcowith (1) , Andrea Chiavassa (2)

1 LUPM - Laboratoire Univers et Particules de Montpellier
2 LAGRANGE - Joseph Louis LAGRANGE

Core-collapse supernovae exploding in dense winds are favorable sites for cosmic-ray (CR) acceleration to very high energies. We present our CR-radiation-hydrodynamics simulations of the explosion of a red supergiant. We study the evolution of the shock wave during the first day following core collapse, and estimate the time at which CR acceleration can start. We then calculate the maximum CR energy at the forward shock as a function of time, and show that it may already exceed 100 TeV only a few hours after shock breakout from the surface of the star.

Mots clés: cosmic radiation: acceleration; star: surface; supernova; cosmic radiation: energy; hydrodynamics; numerical calculations; time dependence; shock waves; collapse; site; VHE

Domaines: Astrophysique [astro-ph]

Gwenael Giacinti, Vikram Dwarkadas, Alexandre Marcowith, Andrea Chiavassa. Numerical Simulations of Cosmic-Ray Acceleration at Core-Collapse Supernovae. 36th International Cosmic Ray Conference, Jul 2019, Madison, United States. pp.074, ⟨10.22323/1.358.0074⟩. ⟨hal-02290760⟩