R-process Nucleosynthesis during the Magnetohydrodynamics Explosions of a Massive Star

TL;DR

This paper explores the potential for r-process nucleosynthesis during magnetohydrodynamical supernova explosions in massive stars, focusing on how magnetic fields and rotation influence element formation.

Contribution

It presents simulations of supernova explosions with varied initial magnetic and rotational properties, highlighting conditions that produce heavy r-process elements.

Findings

Heavy elements and the third peak are produced in low Y_e ejecta.

The second peak is underproduced due to steep Y_e distribution.

Simulations show successful explosions with concentrated magnetic fields and strong differential rotation.

Abstract

We investigate the possibility of the r-process during the magnetohydrohynamical explosion of supernova in a massive star of 13 solar mass with the effects of neutrinos induced. We adopt five kinds of initial models which include properties of rotation and the toroidal component of the magnetic field . The simulations which succeed the explosions are limitted to a concentrated magnetic field and strong differential rotation. Low $Y_{e}$ ejecta produce heavy elements and the third peak can be reprocuced. However, the second peak is low because $Y_{e}$ distribution as a function of radius is steep and ejecta corresponding to middle $Y_{e}$ is very few.