General-relativistic radiation transport scheme in Gmunu II: Implementation of novel microphysical library for neutrino radiation -- Weakhub

Abstract

We introduce \texttt{Weakhub}, a novel neutrino microphysics library that provides opacities and kernels beyond conventional interactions used in the literature. This library includes neutrino-matter, neutrino-photon, and neutrino-neutrino interactions, along with corresponding weak and strong corrections. A full kinematics approach is adopted for the calculations of $\beta$-processes, incorporating various weak corrections and medium modifications due to the nuclear equation of state. Calculations of plasma processes, electron neutrino-antineutrino annihilation, and nuclear de-excitation are included. We also present the detailed derivations of weak interactions and the coupling of them to the two-moment based general-relativistic multi-group radiation transport in the \texttt{G}eneral-relativistic \texttt{mu}ltigrid \texttt{nu}merical (\texttt{Gmunu}) code. We compare the neutrino opacity spectra for all interactions and estimate their contributions at hydrodynamical points in core-collapse supernova and binary neutron star postmerger remnant, and predict the effects of improved opacities in comparison to conventional ones for a binary neutron star postmerger at a specific hydrodynamical point. We test the implementation of the conventional set of interactions by comparing it to an open-source neutrino library \texttt{NuLib} in a core-collapse supernova simulation. We demonstrate good agreement with discrepancies of less than $\sim 10\%$ in luminosity for all neutrino species, while also highlighting the reasons contributing to the differences. To compare the advanced interactions to the conventional set in core-collapse supernova modelling, we perform simulations to analyze their impacts on neutrino signatures, hydrodynamical behaviors, and shock dynamics, showing significant deviations.

References in corpus (24)

• Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
• Neutrino-driven winds from neutron star merger remnants
• Neutrino signatures and the neutrino-driven wind in Binary Neutron Star Mergers
• The dynamical mass ejection from binary neutron star mergers: Radiation-hydrodynamics study in general relativity
• Truncated Moment Formalism for Radiation Hydrodynamics in Numerical Relativity
• Muon Creation in Supernova Matter Facilitates Neutrino-driven Explosions
• Post-merger evolution of a neutron star-black hole binary with neutrino transport
• Impact of an improved neutrino energy estimate on outflows in neutron star merger simulations
• General-Relativistic Large-Eddy Simulations of Binary Neutron Star Mergers
• Neutrino-nucleon scattering in supernova matter from the virial expansion
• Pions in hot dense matter and their astrophysical implications
• Muonization of supernova matter
• Comparing treatments of weak reactions with nuclei in simulations of core-collapse supernovae
• Charged-Current Muonic Reactions in Core-Collapse Supernovae
• Gmunu: Paralleled, grid-adaptive, general-relativistic magnetohydrodynamics in curvilinear geometries in dynamical spacetimes
• Impact of Nucleon-Nucleon Bremsstrahlung Rates Beyond One-Pion Exchange
• Muons in the aftermath of neutron star mergers and their impact on trapped neutrinos
• Stellar electron capture rates on neutron-rich nuclei and their impact on core-collapse
• Gmunu: Toward multigrid based Einstein field equations solver for general-relativistic hydrodynamics simulations
• General-relativistic radiation transport scheme in $\text{Gmunu}$ I: Implementation of two-moment based multi-frequency radiative transfer and code tests
• An extension of Gmunu: General-relativistic resistive magnetohydrodynamics based on staggered-meshed constrained transport with elliptic cleaning
• Oscillations of Highly Magnetized Non-rotating Neutron Stars
• Modified Urca neutrino emissivity at finite temperature
• Energy and Angle Dependence of Neutrino Scattering Rates in Proto-Neutron Star and Supernova Matter within Skyrme RPA

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• The Science of the Einstein Telescope
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• Influence of neutrino-electron scattering and neutrino-pair annihilation on hypermassive neutron star
• High angular momentum hot differentially rotating equilibrium star evolutions in conformally flat spacetime
• Open-source library for performance-portable neutrino reaction rates: Application to neutron star mergers
• Long-term impact of the magnetic-field strength on the evolution and electromagnetic emission by neutron-star merger remnants
• Toward First-Principles Multi-Messenger Predictions: Coupling Nuclear Networks with GR Radiation-MHD in {\tt Gmunu}
• Hyperaccreting Neutron Stars inside Massive Envelopes: The Implausibility of Thorne-Żytkow Objects