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Mass ejection in neutron star mergers
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We present the results of 3D Newtonian SPH simulations of the merger of a neutron star binary. The microscopic properties of matter are described by the physical equation of state of Lattimer and Swesty (LS-EOS). To test for the robustness of our results we check the sensitivity to the approximations of our model as well as to the binary system parameters. The main and new result is that for the realistic LS-EOS, depending on the initial spin, between 4e-3 and 4e-2 solar masses of material become unbound. If, as suggested, large parts of this matter consist of r-process nuclei, neutron star mergers could account for the whole observed r-process material in the Galaxy.
Forward citations
Cited by 6 Pith papers
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Inferring the role of binary neutron star mergers in r-process nucleosynthesis with multi-messenger observations using Cosmic Explorer and Einstein Telescope
A new redshift-correlation technique with third-generation GW detectors can constrain the BNS contribution to cosmic r-process nucleosynthesis to 5-6% precision via Fisher forecasts on mock bright- and dark-siren data.
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Linking Analytic Light Curve Models to Physical Properties of Kilonovae
Analytic two-component fits to kilonova light curves systematically misassign physical ejecta components because post-merger ejecta powers both blue and red emission through reprocessing, though total ejecta mass esti...
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Precise and Rapid Parameter Inference of Kilonova with Conditional Variational Autoencoder
A conditional variational autoencoder is trained on public kilonova light curves to enable rapid parameter inference for binary neutron star merger models in under three hours total.
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Gamma-Ray Spectra of $R$-Process Nuclei
A reference catalog of the gamma-ray lines produced by radioactive decay in four representative r-process scenarios, from 6 hours to 50,000 years.
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Multi-messengers from the radioactive decay of $r$-process nuclei
R-process beta-decay produces non-thermal multi-particle spectra with MeV-scale average energies, potentially observable as gamma-ray and neutrino signals from galactic events.
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Anisotropic Ejecta from Binary Neutron Star Mergers: Self-Consistent Main Thermal and Late-Time Radio Emission of NS-Powered Kilonovae
Anisotropic bipolar and equatorial ejecta distributions produce two-peak features in late-time radio light curves that align with main thermal emissions, with non-detections in AT 2017gfo consistent under typical parameters.
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