The Dynamics of Neutrino-Driven Supernova Explosions after Shock Revival in 2D and 3D

Understand

We study the growth of the explosion energy after shock revival in neutrino-driven explosions in two and three dimensions (2D/3D) using multi-group neutrino hydrodynamics simulations of an $11.2 M_\odot$ star.

• The 3D model shows a faster and steadier growth of the explosion energy and already shows signs of subsiding accretion after one second.
• By contrast, the growth of the explosion energy in 2D is unsteady, and accretion lasts for several seconds as confirmed by additional long-time simulations of stars of similar masses.
• Appreciable explosion energies can still be reached, albeit at the expense of rather high neutron star masses.