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Numerical relativity simulations of prompt collapse mergers: threshold mass and phenomenological constraints on neutron star properties after GW170817

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arxiv 2111.05183 v2 pith:EYPDKKES submitted 2021-11-09 astro-ph.HE gr-qc

Rahul Kashyap , Abhishek Das , David Radice , Surendra Padamata , Aviral Prakash , Domenico Logoteta , Albino Perego , Daniel A. Godzieba
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Sebastiano Bernuzzi Ignazio Bombaci Farrukh J. Fattoyev Brendan T. Reed André da Silva Schneider
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keywords massconstraintsthresholdgw170817maximumphenomenologicalpromptproperties
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abstract

We determine the threshold mass for prompt (no bounce) black hole formation in equal-mass neutron star (NS) mergers using a new set of 227 numerical relativity simulations. We consider 23 phenomenological and microphysical finite temperature equations of state (EOS), including models with hyperons and first-order phase transitions to deconfined quarks. We confirm the existence of EOS-insensitive relations between the threshold mass, the binary tidal parameter at the threshold ($\Lambda_{th}$), the maximum mass of nonrotating NSs, and the radii of reference mass NSs. We correct the systematic errors in previously reported fitting coefficients that were obtained with approximate general-relativity simulations. We combine the EOS-insensitive relations, phenomenological constraints on NS properties and observational data from GW170817 to derive an improved lower limit on radii of maximum mass and 1.6 M$_\odot$ NS of 9.81 km and 10.90 km, respectively. We also constrain the radius and quadrupolar tidal deformability ($\Lambda$) of a 1.4 $M_\odot$ NS to be larger than 10.74 km and 172, respectively. We consider uncertainties in all independent parameters -- fitting coefficients as well as GW170817 masses while reporting the range of radii constraints. We introduce new methods to constrain the upper as well as lower limit of NS maximum mass using future BNS detections and their identification as prompt or delayed collapse. With future observations it will be possible to derive even tighter constraints on the properties of matter at and above nuclear density using the method proposed in this work.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. From Multimessenger Inference to Simulations: A Ranked Ensemble of Finite-Temperature Equations of State

    astro-ph.HE 2026-08 conditional novelty 7.0 of 10

    The paper constructs a 12-member ensemble of finite-temperature neutron star equations of state that spans the posterior from multimessenger and nuclear-physics constraints and releases simulation-ready tables.

  2. Binary neutron stars in the next-generation era: Multi-messenger detection prospects and constraints on the equation of state, mass distribution, and cosmology

    astro-ph.HE 2026-07 conditional novelty 6.0 of 10

    With ET (and ET+CE), mock multi-messenger BNS catalogues yield ~40–500 EM counterparts per year and, under ideal recovery, constrain R1.4 to ~0.2 km and H0 to ~1 km s−1 Mpc−1.

  3. Remnant properties of binary neutron star mergers undergoing prompt collapse

    gr-qc 2025-07 conditional novelty 6.0 of 10

    Prompt-collapse neutron star merger remnants occupy a narrow, high-spin region of the mass-spin plane, and Cosmic Explorer could use tidal deformability to classify most such mergers as neutron star events out to 100-250 Mpc.

  4. Inferring Neutron Star Nuclear Properties from Gravitational-Wave and Gamma-Ray Burst Observations

    astro-ph.HE 2025-06 conditional novelty 6.0 of 10

    By matching LIGO-Virgo-KAGRA merger rates to gamma-ray burst rates, the authors infer that the dividing mass between short and long bursts is about 1.36 times the maximum neutron star mass.

  5. Towards holographic color superconductivity in QCD

    hep-th 2025-05 conditional novelty 6.0 of 10

    In the V-QCD holographic model, quark pairing transitions can occur with critical temperatures up to about 30 MeV, but spatially modulated instabilities grow faster and may dominate.

  6. The impact of hyperons on neutron star mergers: gravitational waves, mass ejection and black hole formation

    astro-ph.HE 2025-01 conditional novelty 6.0 of 10

    Hyperonic equations of state raise the dominant postmerger gravitational-wave frequency by a few percent and reduce the prompt black hole formation threshold by about 0.05 solar masses.

  7. Connecting GRBs from Binary Neutron Star Mergers to Nuclear Properties of Neutron Stars

    astro-ph.HE 2024-12 conditional novelty 6.0 of 10

    By matching population-synthesis predictions to the observed ratio of long to short GRBs from binary neutron star mergers, the authors infer that the long-short remnant transition lies near M_ls ~ 1.3 M_TOV.

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