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arXiv · 2310.09934

Secular Outflows from Long-Lived Neutron Star Merger Remnants

David Radice·Sebastiano Bernuzzi
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Abstract

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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David Radice, Sebastiano Bernuzzi. 2023-10-15. Secular Outflows from Long-Lived Neutron Star Merger Remnants. https://doi.org/10.1088/1742-6596%2F2742%2F1%2F012009

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