Measuring Mass and Radius of the Maximum-mass Nonrotating Neutron Star

Abstract

The mass ($M_{\mathrm{TOV}}$) and radius ($R_{\mathrm{TOV}}$) of the maximum-mass nonrotating neutron star (NS) play a crucial role in constraining the elusive equation of state of cold dense matter and in predicting the fate of remnants from binary neutron star (BNS) mergers. In this study, we introduce a novel method to deduce these parameters by examining the mergers of second-generation (2G) black holes (BHs) with NSs. These 2G BHs are assumed to originate from supramassive neutron stars (SMNSs) formed in BNS mergers. Since the properties of the remnant BHs arising from the collapse of SMNSs follow a universal relation governed by $M_{\mathrm{TOV}}$ and $R_{\mathrm{TOV}}$, we anticipate that by analyzing a series ($\sim 100$ detections) of mass and spin measurements of the 2G BHs using the third-generation ground-based gravitational-wave detectors, $M_{\mathrm{TOV}}$ and $R_{\mathrm{TOV}}$ can be determined with a precision of $\sim 0.01M_{\odot }$ and $\sim 0.6$ km, respectively.

11 pages, 5 figures, ApJ published

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Cited by in corpus (3)

• Novel Scalings of Neutron Star Properties from Analyzing Dimensionless Tolman--Oppenheimer--Volkoff Equations
• Phase transition and nuclear symmetry energy from neutron star observations: Constraints in light of PSR J0614--3329
• Mass and radius of the most massive neutron star: The probe of the equation of state and perturbative QCD