2023/09/14 by T. M. Sprouse, Sprouse, T. M., Kelsey A. Lund +7
Engineering · Physics and Astronomy · #FOS: Physical sciences #Gamma-ray bursts and supernovae #General Relativity and Quantum Cosmology (gr-qc) #High Energy Astrophysical Phenomena (astro-ph.HE) #Nuclear Theory (nucl-th) #Particle Accelerators and Free-Electron Lasers #Solar and Stellar Astrophysics (astro-ph.SR) #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.2309.07966
openalex publication_date 2023/09/14 · openalex created_date 2023/09/19 · openalex updated_date 2026/07/28
We simulate a black-hole accretion disk system with full-transport general relativistic neutrino radiation magnetohydrodynamics (GRνRMHD) for 1.2 seconds. This system is likely to form after the merger of two compact objects and is thought to be a robust site of r-process nucleosynthesis. We consider the case of a black-hole accretion disk arising from the merger of two neutron stars. Our simulation time coincides with the nucleosynthesis timescale of the r process (∼ 1 second). Because these simulations are time consuming, it is common practice to run for `short' duration of approximately 0.1 to 0.3 seconds. We analyze the nucleosynthetic outflow from this system and compare the results between stopping at 0.12 and 1.2 seconds respectively. We find that the addition of mass ejected in the longer simulation as well as more favorable thermodynamic conditions from emergent viscous ejecta greatly impacts the nucleosynthetic outcome. We quantify the error in nucleosynthetic outcomes between short and long cuts.