Thermal Effects in Binary Neutron Star Mergers

Abstract

We study the impact of finite-temperature effects in numerical-relativity simulations of binary neutron star mergers with microphysical equations of state and neutrino transport in which we vary the effective nucleon masses in a controlled way. We find that, as the specific heat is increased, the merger remnants become colder and more compact due to the reduced thermal pressure support. Using a full Bayesian analysis, we demonstrate that this effect will be measurable in the postmerger gravitational wave signal with next-generation observatories at signal-to-noise ratios of 15.

9 pages, 6 figures, accepted for publication in ApJL

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• Impact of nuclear matter properties on the nucleosynthesis and the kilonova from binary neutron star merger ejecta
• Problematic systematics in neutron-star merger simulations
• Investigating the role of nuclear parameters on oscillation modes in hot Neutron Stars
• Identifying thermal effects in neutron star merger remnants with model-agnostic waveform reconstructions and third-generation detectors
• The impact of hyperons on neutron star mergers: gravitational waves, mass ejection and black hole formation
• Modeling matter(s) in SEOBNRv5THM: Generating fast and accurate effective-one-body waveforms for spin-aligned binary neutron stars
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• Investigating the Impact of Higher-Order Phase Transitions in Binary Neutron-Star Mergers
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• Exploring the Potential for Detecting Rotational Instabilities in Binary Neutron Star Merger Remnants with Gravitational Wave Detectors
• Chiral effects and Joule heating in hot and dense matter
• Robust and fast parameter estimation for gravitational waves from binary neutron star merger remnants
• $f$ and $p$ mode oscillation of proto-neutron stars with systematic variation of the nucleon effective mass
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• New {\em ab initio} constrained extended Skyrme equations of state for simulations of neutron stars, supernovae and binary mergers: I. Subsaturation density domain
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• Kilohertz Gravitational Waves from Binary Neutron Star Mergers: Full Spectrum Analyses and High-density Constraints on Neutron Star Matter
• 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
• Convective stability analysis of massive neutron stars formed in binary mergers
• Isentropic hybrid stars in the Nambu-Jona-Lasinio model: effects of neutrino trapping
• Three-dimensional equation of state extension of quark matter in Fermi-liquid theory