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Measuring Neutron Star Radius with second and third generation Gravitational Wave Detector Networks

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arxiv 2402.05056 v1 pith:KD47YRUV submitted 2024-02-07 astro-ph.HE gr-qcnucl-th

Ananya Bandopadhyay , Keisi Kacanja , Rahul Somasundaram , Alexander H. Nitz , Duncan A. Brown This is my paper · ORCID
classification astro-ph.HEgr-qcnucl-th
keywords stateequationneutronstarconstraintsdetectorgenerationradius
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The next generation of ground-based interferometric gravitational wave detectors will observe mergers of black holes and neutron stars throughout cosmic time. A large number of the binary neutron star merger events will be observed with extreme high fidelity, and will provide stringent constraints on the equation of state of nuclear matter. In this paper, we investigate the systematic improvement in the measurability of the equation of state with increase in detector sensitivity by combining constraints obtained on the radius of a $1.4 \, \mathrm{M}_{\odot}$ neutron star from a simulated source population. Since the measurability of the equation of state depends on its stiffness, we consider a range of realistic equations of state that span the current observational constraints. We show that a single 40km Cosmic Explorer detector can pin down the neutron star radius for a soft, medium and stiff equation of state to an accuracy of 10m within a decade, whereas the current generation of ground-based detectors like the Advanced LIGO-Virgo network would take $\mathcal{O}(10^5)$ years to do so for a soft equation of state.

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Cited by 2 Pith papers

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

  1. Cosmic Calipers: Precise and Accurate Neutron Star Radius Measurements with Next-Generation Gravitational Wave Detectors

    astro-ph.HE 2025-02 conditional novelty 5.0 of 10

    Future gravitational wave detectors should measure most neutron star radii to within about 5%, while current detectors give biased and imprecise estimates.

  2. Quantifying the Information Gain from Future High-Precision Radius Measurements for Identifying Twin Neutron Stars

    astro-ph.HE 2026-07 reject novelty 4.0 of 10

    The paper claims a radius precision of ~0.2 km is enough to extract most Bayesian information for identifying twin neutron stars, but its own distinguishability and entropy analyses suggest notable gains remain down t...

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