A Detailed Comparison of Multi-Dimensional Boltzmann Neutrino Transport Methods in Core-Collapse Supernovae

Understand

The mechanism driving core-collapse supernovae is sensitive to the interplay between matter and neutrino radiation.

• However, neutrino radiation transport is very difficult to simulate, and several radiation transport methods of varying levels of approximation are available.
• We carefully compare for the first time in multiple spatial dimensions the discrete ordinates (DO) code of Nagakura, Yamada, and Sumiyoshi and the Monte Carlo (MC) code Sedonu, under the assumptions of a static fluid background, flat spacetime, elastic scattering, and full special relativity.
• We find remarkably good agreement in all spectral, angular, and fluid interaction quantities, lending confidence to both methods.