Secular Outflows from Long-Lived Neutron Star Merger Remnants

Radice, David; Bernuzzi, Sebastiano

doi:10.1088/1742-6596/2742/1/012009

Title: Secular Outflows from Long-Lived Neutron Star Merger Remnants

Journal Article · 31 March 2024 · Journal of Physics. Conference Series

DOI: https://doi.org/10.1088/1742-6596/2742/1/012009 · OSTI ID:2356797

Radice, David ^[1]; Bernuzzi, Sebastiano ^[2]

Pennsylvania State University, University Park, PA (United States); The Pennsylvania State University
Friedrich-Schiller-Universität Jena (Germany)

We study mass ejection from a binary neutron star merger producing a long-lived massive neutron star remnant with general-relativistic neutrino-radiation hydrodynamics simulations. In addition to outflows generated by shocks and tidal torques during and shortly after the merger, we observe the appearance of a wind driven by spiral density waves in the disk. This spiral-wave-driven outflow is predominantly located close to the disk orbital plane and have a broad distribution of electron fractions. At higher latitudes, a high electron-fraction wind is driven by neutrino radiation. The combined nucleosynthesis yields from all the ejecta components is in good agreement with Solar abundance measurements.

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Research Organization:: Pennsylvania State University, University Park, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); EU Horizon

Grant/Contract Number:: SC0021177; AC02-05CH11231

OSTI ID:: 2356797

Journal Information:: Journal of Physics. Conference Series, Journal Name: Journal of Physics. Conference Series Journal Issue: 1 Vol. 2742; ISSN 1742-6588

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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