Effects of nuclear matter properties in neutron star mergers
arXiv:2309.09233 · doi:10.1093/mnras/stad3738
Abstract
The dynamics in mergers of binary neutron star (BNS) systems depend sensitively on the equation of state (EOS) of dense matter. This has profound implications on the emission of gravitational waves (GWs) and the ejection of matter in the merger and post-merger phases and is thus of high interest for multi-messenger astronomy. Today, a variety of nuclear EOSs are available with various underlying microphysical models. This calls for a study to focus on EOS effects from different physical nuclear matter properties and their influence on BNS mergers. We perform simulations of equal-mass BNS mergers with a set of 9 different EOSs based on Skyrme density functionals. In the models, we systematically vary the effective nucleon mass, incompressibility, and symmetry energy at saturation density. This allows us to investigate the influence of specific nuclear matter properties on the dynamics of BNS mergers. We analyze the impact of these properties on the merger dynamics, the fate of the remnant, disk formation, ejection of matter, and gravitational wave emission. Our results indicate that some aspects of the merger are sensitive to the EOS around saturation density while others are sensitive to the behavior towards higher densities, e.g., characterized by the slope of the pressure as a function of density. The detailed density dependence of the EOS thus needs to be taken into account to describe its influence on BNS mergers.
17 pages, 19 figures, published version
References in corpus (54)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Shapiro delay measurement of a two solar mass neutron star
- A Massive Pulsar in a Compact Relativistic Binary
- Multi-messenger Observations of a Binary Neutron Star Merger
- A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
- Swope Supernova Survey 2017a (SSS17a), the Optical Counterpart to a Gravitational Wave Source
- The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. II. UV, Optical, and Near-IR Light Curves and Comparison to Kilonova Models
- Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
- A kilonova as the electromagnetic counterpart to a gravitational-wave source
- The X-ray counterpart to the gravitational wave event GW 170817
- Light Curves of the Neutron Star Merger GW170817/SSS17a: Implications for R-Process Nucleosynthesis
- Illuminating Gravitational Waves: A Concordant Picture of Photons from a Neutron Star Merger
- Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
- The Emergence of a Lanthanide-Rich Kilonova Following the Merger of Two Neutron Stars
- Optical emission from a kilonova following a gravitational-wave-detected neutron-star merger
- Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers
- Improved nuclear matter calculations from chiral low-momentum interactions
- Swift and NuSTAR observations of GW170817: detection of a blue kilonova
- Neutrino-driven winds from neutron star merger remnants
- The discovery of the electromagnetic counterpart of GW170817: kilonova AT 2017gfo/DLT17ck
- Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory
- 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
- Precision Determination of the Neutral Weak Form Factor of Ca
- Spectral properties of the post-merger gravitational-wave signal from binary neutron stars
- A NICER view of PSR J0030+0451: Implications for the dense matter equation of state
- MASTER optical detection of the first LIGO/Virgo neutron stars merging GW170817
- Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density
- Testing Approximations of Thermal Effects in Neutron Star Merger Simulations
- The Dynamics of Binary Neutron Star Mergers and of GW170817
- Follow up of GW170817 and its electromagnetic counterpart by Australian-led observing programs
- Impact of the PSR J0740+6620 radius constraint on the properties of high-density matter
- THC: a new high-order finite-difference high-resolution shock-capturing code for special-relativistic hydrodynamics
- J-GEM observations of an electromagnetic counterpart to the neutron star merger GW170817
- Properties of hypermassive neutron stars formed in mergers of spinning binaries
- Gravitational waves and mass ejecta from binary neutron star mergers: Effect of the mass-ratio
- Full Transport Model of GW170817-Like Disk Produces a Blue Kilonova
- On r-process nucleosynthesis from matter ejected in binary neutron starmergers
- A lower bound on the maximum mass if the secondary in GW190814 was once a rapidly spinning neutron star
- Observations of the first electromagnetic counterpart to a gravitational wave source by the TOROS collaboration
- A New Open-Source Nuclear Equation of State Framework based on the Liquid-Drop Model with Skyrme Interaction
- GRB170817A associated with GW170817: multifrequency observations and modeling of prompt gamma-ray emission
- Covariant formulations of BSSN and the standard gauge
- Post-merger Mass Ejection of Low-mass Binary Neutron Stars
- Nuclear equation of state for arbitrary proton fraction and temperature based on chiral effective field theory and a Gaussian process emulator
- General-relativistic neutrino-radiation magnetohydrodynamic simulation of seconds-long black hole-neutron star mergers
- Comprehensive study of mass ejection and nucleosynthesis in binary neutron star mergers leaving short-lived massive neutron stars
- GRMHD simulations of neutron-star mergers with weak interactions: r-process nucleosynthesis and electromagnetic signatures of dynamical ejecta
- Equation of state effects and one-arm spiral instability in hypermassive neutron stars formed in eccentric neutron star mergers
- Thermal Effects in Binary Neutron Star Mergers
- Estimating outflow masses and velocities in merger simulations: impact of r-process heating and neutrino cooling
- Spectral analysis of gravitational waves from binary neutron star merger remnants
- Long-term 3D-MHD Simulations of Black Hole Accretion Disks formed in Neutron Star Mergers
- A study of the agreement between binary neutron star ejecta models derived from numerical relativity simulations
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- Long-lived neutron-star remnants from asymmetric binary neutron star mergers: element formation, kilonova signals and gravitational waves
- Chemical Evolution of R-process Elements in Stars (CERES): IV. An observational run-up of the third r-process peak with Hf, Os, Ir, and Pt
- Impact of nuclear matter properties on the nucleosynthesis and the kilonova from binary neutron star merger ejecta
- Robust and fast parameter estimation for gravitational waves from binary neutron star merger remnants
- Ab initio calculations of monopole sum rules: From finite nuclei to infinite nuclear matter
- Neutron star crust and outer core equation of state from chiral effective field theory with quantified uncertainties
- Exploring Composition Mixing in Kilonova Ejecta with Ray-by-ray Simulations