Neutron Star Merger Remnants

Abstract

Binary neutron star mergers observations are a unique way to constrain fundamental physics and astrophysics at the extreme. The interpretation of gravitational-wave events and their electromagnetic counterparts crucially relies on general-relativistic models of the merger remnants. Quantitative models can be obtained only by means of numerical relativity simulations in 3+1 dimensions including detailed input physics for the nuclear matter, electromagnetic and weak interactions. This review summarizes the current understanding of merger remnants focusing on some of the aspects that are relevant for multimessenger observations.

40 pages, 9 figures, 305 references. Invited review for the Topical Collection on Binary Neutron Star mergers of the journal General Relativity and Gravitation. Fixed few references

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• Numerical relativity simulations of neutron star merger remnants using conservative mesh refinement
• Revisiting the lower bound on tidal deformability derived by AT 2017gfo
• First 100 ms of a long-lived magnetized neutron star formed in a binary neutron star merger
• Challenging the paradigm of singularity excision in gravitational collapse
• Phase transitions and He-synthesis driven winds in neutrino cooled accretion disks: prospects for late flares in short gamma-ray bursts
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• Exploring the sensitivity of gravitational wave detectors to neutron star physics
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• Binary Neutron Star Merger Simulations with a Calibrated Turbulence Model
• Equation of state effects and one-arm spiral instability in hypermassive neutron stars formed in eccentric neutron star mergers
• Gravitational-Wave Extraction from Neutron Star Oscillations: comparing linear and nonlinear techniques
• Hyper-accreting black holes
• The role of weak interactions in dynamic ejecta from binary neutron star mergers
• The trumpet solution from spherical gravitational collapse with puncture gauges

Cited by in corpus (83)

• Impact of the PSR J0740+6620 radius constraint on the properties of high-density matter
• First Multimessenger Observations of a Neutron Star Merger
• The evolution of binary neutron star post-merger remnants: a review
• A pulsar in a binary with a compact object in the mass gap between neutron stars and black holes
• Relativistic fluid dynamics: physics for many different scales
• Merger and post-merger of binary neutron stars with a quark-hadron crossover equation of state
• Systematics of prompt black-hole formation in neutron star mergers
• Constraints on the maximum mass of neutron stars with a quark core from GW170817 and NICER PSR J0030+0451 data
• Binary neutron star merger simulations with neutrino transport and turbulent viscosity: impact of different schemes and grid resolution
• Second release of the CoRe database of binary neutron star merger waveforms
• Mapping dynamical ejecta and disk masses from numerical relativity simulations of neutron star mergers
• GRAthena++: puncture evolutions on vertex-centered oct-tree AMR
• Impact of the nuclear symmetry energy on the post-merger phase of a binary neutron star coalescence
• Dynamical ejecta synchrotron emission as possible contributor to the changing behaviour of GRB170817A
• Frequency deviations in universal relations of isolated neutron stars and postmerger remnants
• Ab-Initio General-Relativistic Neutrino-Radiation Hydrodynamics Simulations of Long-Lived Neutron Star Merger Remnants to Neutrino Cooling Timescales
• Analytic models of the spectral properties of gravitational waves from neutron star merger remnants
• Angular Momentum Transport in Proto-Neutron Stars and the Fate of Neutron Star Merger Remnants
• Numerical relativity simulations of the neutron star merger GW190425: microphysics and mass ratio effects
• On the diversity of magnetar-driven kilonovae
• Thermodynamical Description of Hot, Rapidly Rotating Neutron Stars, Protoneutron Stars, and Neutron Star Merger Remnants
• Formulating bulk viscosity for neutron star simulations
• Neutron stars and the dense matter equation of state: from microscopic theory to macroscopic observations
• Muons in the aftermath of neutron star mergers and their impact on trapped neutrinos
• First Constraints on the Photon Coupling of Axion-like Particles from Multimessenger Studies of the Neutron Star Merger GW170817
• Degeneracy in the inference of phase transitions in the neutron star equation of state from gravitational wave data
• Gravitational waves from mountains in newly born millisecond magnetars
• Axisymmetric models for neutron star merger remnants with realistic thermal and rotational profiles
• Axions: From Magnetars and Neutron Star Mergers to Beam Dumps and BECs
• Binary neutron star merger simulations with hot microscopic equations of state
• Detectability of QCD phase transitions in binary neutron star mergers: Bayesian inference with the next generation gravitational wave detectors
• Modeling gravitational waves from exotic compact objects
• Unraveling information about supranuclear-dense matter from the complete binary neutron star coalescence process using future gravitational-wave detector networks
• Equilibrium sequences of differentially rotating stars with post-merger-like rotational profiles
• Gravitational waves from accretion-induced descalarization in massive scalar-tensor theory
• Characterizing the breakdown of quasi-universality in the post-merger gravitational waves from binary neutron star mergers
• Electromagnetic Counterparts of Compact Binary Mergers
• Using machine learning to parametrize postmerger signals from binary neutron stars
• Interpolating Detailed Simulations of Kilonovae: Adaptive Learning and Parameter Inference Applications
• Models of binary neutron star remnants with tabulated equations of state
• High-accuracy simulations of highly spinning binary neutron star systems
• Quantifying uncertainties in general relativistic magnetohydrodynamic codes
• Merger-inspired rotation laws and the low-T/W instability in neutron stars
• Turbulence modelling in neutron star merger simulations
• Evolution of equal mass binary bare quark stars in full general relativity: could a supramassive merger remnant experience prompt collapse?
• Spritz: General Relativistic Magnetohydrodynamics with Neutrinos
• Surrogate light curve models for kilonovae with comprehensive wind ejecta outflows and parameter estimation for AT2017gfo
• Improving the convergence order of binary neutron star merger simulations in the Baumgarte-Shapiro-Shibata-Nakamura formulation
• Modeling kilonova afterglows: Effects of the thermal electron population and interaction with GRB outflows
• Machine Learning for Conservative-to-Primitive in Relativistic Hydrodynamics
• Recent developments in mathematical aspects of relativistic fluids
• Geometric and thermodynamic characterization of binary neutron star accretion discs
• Effects of nuclear matter properties in neutron star mergers
• The puzzling long GRB 191019A: Evidence for Kilonova Light
• Prospects for Direct Detection of Black Hole Formation in Neutron Star Mergers with Next-Generation Gravitational-Wave Detectors
• The physics of non-ideal general relativistic magnetohydrodynamics
• Universal Relations For Generic Family Of Neutron Star Equations Of State
• Element formation in radiation-hydrodynamics simulations of kilonovae
• Implementing a new recovery scheme for primitive variables in the general relativistic magnetohydrodynamic code Spritz
• The GW-Universe Toolbox III: simulating joint observations of gravitational waves and gamma-ray bursts
• Synthetic radio images of structured GRB and kilonova afterglows
• On the Testability of the Quark-Hadron Transition Using Gravitational Waves From Merging Binary Neutron Stars
• Incidence of afterglow plateaus in gamma-ray bursts associated with binary neutron star mergers
• Gravitational-wave searches in the era of Advanced LIGO and Virgo
• 2D End-to-End Modeling of Kilonovae from Binary Neutron Star Merger Remnants
• Late-time non-thermal emission from mildly relativistic tidal ejecta of compact objects merger
• Gravitational-wave evolution of newborn magnetars with different deformed structure
• Neutron star binaries produced by binary-driven hypernovae, their mergers, and the link between long and short GRBs
• Eccentric mergers of binary Proca stars
• Gravitational-wave model for neutron star merger remnants with supervised learning
• Modeling Solids in Nuclear Astrophysics with Smoothed Particle Hydrodynamics
• Robust and fast parameter estimation for gravitational waves from binary neutron star merger remnants
• R-process heating implementation in hydrodynamic simulations with neural networks
• Numerical Relativity Estimates of the Remnant Recoil Velocity in Binary Neutron Star Mergers
• Impact of in situ nuclear networks and atomic opacities on neutron star merger ejecta dynamics, nucleosynthesis, and kilonovae
• General relativistic self-gravitating equilibrium disks around rotating neutron stars
• Subgrid modelling of MRI-driven turbulence in differentially rotating neutron stars
• Fast Neutrino Conversion in Hydrodynamic Simulations of Neutrino-Cooled Accretion Disks
• Probing neutron stars with the full pre-merger and post-merger gravitational wave signal from binary coalescences
• Light scalars in neutron star mergers
• Investigating the mass-ratio dependence of the prompt-collapse threshold with numerical-relativity simulations
• Radial oscillations of quark stars in light of current astrophysical constraints: A comparative study
• Quasi-stationary sequences of hyper massive neutron stars with exotic equations of state