Full Transport General Relativistic Radiation Magnetohydrodynamics for Nucleosynthesis in Collapsars
Jonah M. Miller, Trevor M. Sprouse, Christopher L. Fryer, Benjamin R. Ryan, Joshua C. Dolence, Matthew R. Mumpower, Rebecca Surman
Abstract
Abstract We model a compact black hole-accretion disk system in the collapsar scenario with full transport, frequency dependent, general relativistic radiation magnetohydrodynamics. We examine whether or not winds from a collapsar disk can undergo rapid neutron capture (r-process) nucleosynthesis and significantly contribute to solar r-process abundances. We find the inclusion of accurate transport has significant effects on outflows, raising the electron fraction above and preventing third-peak r-process material from being synthesized. We analyze the time evolution of neutrino processes and electron fraction in the disk and present a simple one-dimensional model for the vertical structure that emerges. We compare our simulation to semi-analytic expectations and argue that accurate neutrino transport and realistic initial and boundary conditions are required to capture the dynamics and nucleosynthetic outcome of a collapsar.