The intermediate r-process in core-collapse supernovae driven by the magneto-rotational instability

Understand

We investigated r-process nucleosynthesis in magneto-rotational supernovae, based on a new explosion mechanism induced by the magneto-rotational instability.

• A series of axisymmetric magneto-hydrodynamical simulations with detailed microphysics including neutrino heating is performed, numerically resolving the magneto-rotational instability.
• Neutrino-heating dominated explosions, enhanced by magnetic fields, showed mildly neutron-rich ejecta producing nuclei up to $A \sim 130$ (i.e.
• the weak r-process), while explosion models with stronger magnetic fields reproduce a solar-like r-process pattern.