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

Sprouse, Trevor M.; Lund, Kelsey A.; Miller, Jonah M.; McLaughlin, Gail C.; Mumpower, Matthew R.

doi:10.3847/1538-4357/ad1819

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

Journal Article · Thu Feb 08 00:00:00 EST 2024 · The Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/ad1819· OSTI ID:2293636

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Abstract 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.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: 20220564ECR; 20230052ER; FG02-02ER41216

OSTI ID:: 2293636

Journal Information:: The Astrophysical Journal, Journal Name: The Astrophysical Journal Vol. 962 Journal Issue: 1; ISSN 0004-637X

Publisher:: American Astronomical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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