Strong magnetic field inside degenerate relativistic plasma and the impacts on the neutrino transport in Core-Collapse Supernovae

Abstract

We investigate the impacts of strong magnetic fields on neutrino transport in core-collapse supernovae (CCSNe) using the leakage scheme. Magnetic field quantizes the momentum of electrons and positrons, resulting in the modification of weak-interaction cross sections and the chemical potentials of electrons and positrons. We derive formula for neutrino leakage scheme including these two impacts and perform 1D CCSN simulations with \texttt{GR1D}. Magnetic field strengths from $10^{16}$\,G to $10^{17}$\,G were applied to postbounce phase. The results show that the neutrino opacities are enhanced due to the amplified interaction rates, with stronger effects on anti-neutrinos. This leads to larger neutrinosphere radii, longer neutrino trapping timescales, reduced peak luminosities, and delayed peak energies.

arXiv comment25 pages, 10 figures, published in Chin. Phys. C