Equation of State Dependence of Gravitational Waves in Core-Collapse Supernovae

Abstract

Gravitational waves (GWs) provide unobscured insight into the birthplace of neutron stars (NSs) and black holes in core-collapse supernovae (CCSNe). The nuclear equation of state (EOS) describing these dense environments is yet uncertain, and variations in its prescription affect the proto-neutron star (PNS) and the post-bounce dynamics in CCSNe simulations, subsequently impacting the GW emission. We perform axisymmetric simulations of CCSNe with Skyrme-type EOSs to study how the GW signal and PNS convection zone are impacted by two experimentally accessible EOS parameters, (1) the effective mass of nucleons, $m^{\star }$, which is crucial in setting the thermal dependence of the EOS, and (2) the isoscalar incompressibility modulus, $K_{\mathrm{sat}}$. While $K_{\mathrm{sat}}$ shows little impact, the peak frequency of the GWs has a strong effective mass dependence due to faster contraction of the PNS for higher values of $m^{\star }$ owing to a decreased thermal pressure. These more compact PNSs also exhibit more neutrino heating which drives earlier explosions and correlates with the GW amplitude via accretion plumes striking the PNS, exciting the oscillations. We investigate the spatial origin of the GWs and show the agreement between a frequency-radial distribution of the GW emission and a perturbation analysis. We do not rule out overshoot from below via PNS convection as another moderately strong excitation mechanism in our simulations. We also study the combined effect of effective mass and rotation. In all our simulations we find evidence for a power gap near $\sim$1250 Hz, we investigate its origin and report its EOS dependence.

21 pages, 14 figures

References in corpus (27)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• A Massive Pulsar in a Compact Relativistic Binary
• Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
• The Role of Turbulence in Neutrino-Driven Core-Collapse Supernova Explosions
• Equation-of-State Dependent Features in Shock-Oscillation Modulated Neutrino and Gravitational-Wave Signals from Supernovae
• Incompressibility of neutron-rich matter
• The Dynamics of Neutrino-Driven Supernova Explosions after Shock Revival in 2D and 3D
• Rotation-supported Neutrino-driven Supernova Explosions in Three Dimensions and the Critical Luminosity Condition
• A New Open-Source Nuclear Equation of State Framework based on the Liquid-Drop Model with Skyrme Interaction
• Three-dimensional core-collapse supernova simulations of massive and rotating progenitors
• Correlated Signatures of Gravitational-Wave and Neutrino Emission in Three-Dimensional General-Relativistic Core-Collapse Supernova Simulations
• Gravitational-wave signal of a core-collapse supernova explosion of a 15 Solar mass star
• New equations of state constrained by nuclear physics, observations, and QCD calculations of high-density nuclear matter
• Anisotropic emission of neutrino and gravitational-wave signals from rapidly rotating core-collapse supernovae
• Gravitational Wave Extraction in Simulations of Rotating Stellar Core Collapse
• Equation of State and Progenitor Dependence of Stellar-Mass Black-Hole Formation
• Gravitational-wave Signature of a First-order Quantum Chromodynamics Phase Transition in Core-Collapse Supernovae
• Features of Accretion-phase Gravitational-wave Emission from Two-dimensional Rotating Core-collapse Supernovae
• Avoided crossing in gravitational wave spectra from protoneutron star
• Gravitational-wave Signals From Three-dimensional Supernova Simulations With Different Neutrino-Transport Methods
• Wave heating from proto-neutron star convection and the core-collapse supernova explosion mechanism
• Impact of neutrino pair-production rates in Core-Collapse Supernovae
• Constraining the nonanalytic terms in the isospin-asymmetry expansion of the nuclear equation of state
• Consistent perturbative modeling of pseudo-Newtonian core-collapse supernova simulations
• Detecting and reconstructing gravitational waves from the next Galactic core-collapse supernova in the Advanced Detector Era

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• Hot and Dense Matter Equation of State Probability Distributions for Astrophysical Simulations
• Gray Two-moment Neutrino Transport: Comprehensive Tests and Improvements for Supernova Simulations
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• Unveiling the Nature of Gravitational-Wave Emission in Core-collapse Supernovae with Perturbative Analysis
• Multi-messenger observations of core-collapse supernovae: Exploiting the standing accretion shock instability
• Black Hole Supernovae, their Equation of State Dependence and Ejecta Composition
• Probing nuclear physics with supernova gravitational waves and machine learning
• Impact of Rotation on the Multimessenger Signatures of a Hadron-quark Phase Transition in Core-collapse Supernovae
• Influence of effective nucleon mass on equation of state for supernova simulations and neutron stars
• Investigating the role of nuclear parameters on oscillation modes in hot Neutron Stars
• Deep-Learning Classification and Parameter Inference of Rotational Core-Collapse Supernovae
• Core Collapse Supernova Gravitational Wave Sourcing and Characterization based on Three-Dimensional Models
• Influence of the effective mass on the properties of nuclear matter at finite density and temperature
• Effects of multidimensional treatment of gravity in simulations on supernova gravitational waves
• Evolving massive stars to core collapse with GENEC: Extension of equation of state, opacities and effective nuclear network
• $f$ and $p$ mode oscillation of proto-neutron stars with systematic variation of the nucleon effective mass
• Neutron star oscillations in pseudo-Newtonian gravity
• New {\em ab initio} constrained extended Skyrme equations of state for simulations of neutron stars, supernovae and binary mergers: I. Subsaturation density domain
• Convection signatures in early-time gravitational waves from core-collapse supernovae
• New ab initio constrained extended Skyrme equations of state for simulations of neutron stars, supernovae and binary mergers: II. Thermal response in the suprasaturation density domain
• Neutrino Driven Explosions aided by Axion Cooling in Multidimensional Simulations of Core-Collapse Supernovae
• Stochastic Gravitational-Wave Background from Stellar Core-Collapse Events
• Trends in gravitational wave emission in axisymmetric simulations of rotating core-collapse supernovae