Emergent Nucleosynthesis from a 1.2 s Long Simulation of a Black Hole Accretion Disk

We simulate a black hole accretion disk system with full-transport general relativistic neutrino radiation magnetohydrodynamics for 1.2 s. 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...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2024-02, Vol.962 (1), p.79
Main Authors: Sprouse, Trevor M., Lund, Kelsey A., Miller, Jonah M., McLaughlin, Gail C., Mumpower, Matthew R.
Format: Article
Language:English
Subjects:
Accretion disks
ASTRONOMY AND ASTROPHYSICS
Black holes
Ejecta
Magnetohydrodynamical simulations
Magnetohydrodynamics
Neutrinos
Neutron stars
Nuclear astrophysics
Nuclear fusion
Nuclear physics
Nucleosynthesis
R-process
Simulation
Star mergers
Stellar accretion discs
Stellar accretion disks
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We simulate a black hole accretion disk system with full-transport general relativistic neutrino radiation magnetohydrodynamics for 1.2 s. 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 s). Because these simulations are time-consuming, it is common practice to run for a “short” duration of approximately 0.1–0.3 s. We analyze the nucleosynthetic outflow from this system and compare the results of stopping at 0.12 and 1.2 s. 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.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ad1819