On the viability for r-process nucleosynthesis in collapsars*

We model a black hole – accretion disk system originating from the circularization of in-falling matter from a collapsing star – the collapsar scenario. We use the new, open source code Phoebus which includes frequency dependent general relativistic radiation magnetohydrodynamics with a dense matter equation of state. Using these improved initial conditions, we access the prospects for rapid neutron capture (r-process) nucleosynthesis occurring in the collapsar disk winds. Moreover, we access whether or not these winds may escape the in-falling stellar mantle and carry away r-process rich ejecta. We present prospects for future work on the sensitivity of these results to properties of the progenitor star.