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Probing the incompressibility of nuclear matter at ultra-high density through the prompt collapse of asymmetric neutron star binaries

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arxiv 2112.05864 v2 pith:AUNBPIVA submitted 2021-12-10 astro-ph.HE gr-qcnucl-th

A. Perego , D. Logoteta , D. Radice , S. Bernuzzi , R. Kashyap , A. Das , S. Padamata , A. Prakash This is my paper
classification astro-ph.HEgr-qcnucl-th
keywords neutronmassstarbinariescollapseincompressibilitypromptdensity
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abstract

Using 250 neutron star merger simulations with microphysics, we explore for the first time the role of nuclear incompressibility in the prompt collapse threshold for binaries with different mass ratios. We demonstrate that observations of prompt collapse thresholds, either from binaries with two different mass ratios or with one mass ratio but combined with the knowledge of the maximum neutron star mass or compactness, will constrain the incompressibility at the maximum neutron star density, $K_{\rm max}$, to within tens of percent. This, otherwise inaccessible, measure of $K_{\rm max}$ can potentially reveal the presence of hyperons or quarks inside neutron stars.

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Cited by 3 Pith papers

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  1. Holographic Soliton Crystals for Dense Nuclear Matter and Neutron Stars

    hep-ph 2026-07 conditional novelty 7.0 of 10

    A crystal of holographic baryons in the Witten-Sakai-Sugimoto model yields a nuclear-matter equation of state compatible with neutron-star observations.

  2. Direct Measurement of the Accretion Disk Formed in Prompt Collapse Mergers with Future Gravitational-Wave Observatories

    gr-qc 2025-07 conditional novelty 7.0 of 10

    The postmerger ringdown frequency of promptly collapsing binary neutron star mergers is correlated with accretion disk mass, allowing a proposed 10 percent measurement with third-generation gravitational wave detectors.

  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.

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