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We reanalyze the binary-neutron-star signals, GW170817 and GW190425, focusing on the inspiral regime to avoid uncertainties on waveform modeling in the postinspiral regime. We use post-Newtonian waveform models as templates, which are…

General Relativity and Quantum Cosmology · Physics 2025-04-18 Tatsuya Narikawa , Nami Uchikata

The observation of the gravitational wave signal GW170817, consistent with emission from the inspiral of a binary neutron-star system, provided information on the tidal deformation of the participating stars. The available data may be…

Nuclear Theory · Physics 2020-05-06 Andrea Sabatucci , Omar Benhar

A neutron star (NS) in a binary system deforms due to the companion's tidal gravitational field. As the binary inspirals due to gravitational wave (GW) emission, the NS's deformation evolves; this evolution is typically modeled as the…

General Relativity and Quantum Cosmology · Physics 2025-03-18 K. J. Kwon , Hang Yu , Tejaswi Venumadhav

After the detection of gravitational waves caused by the coalescence of compact objects in the mass range of neutron stars, GW170817, several studies have searched for an imprint of tidal effects in the signal, employing different model…

General Relativity and Quantum Cosmology · Physics 2019-12-02 Wolfgang Kastaun , Frank Ohme

The first detection of gravitational waves (GWs) from the binary neutron star (NS) inspiral GW170817 has opened a unique channel for probing the fundamental properties of matter at supra-nuclear densities inaccessible elsewhere in the…

General Relativity and Quantum Cosmology · Physics 2020-06-03 Geraint Pratten , Patricia Schmidt , Tanja Hinderer

We constrain the fundamental-mode ($f$-mode) oscillation frequencies of nonrotating neutron stars using a phenomenological Gaussian process model for the unknown dense-matter equation of state conditioned on a suite of gravitational-wave,…

High Energy Astrophysical Phenomena · Physics 2026-01-01 Sailesh Ranjan Mohanty , Utkarsh Mali , H. C. Das , Bharat Kumar , Philippe Landry

Observations of gravitational wave (GW) signals produced by coalescing binary neutron stars (NS), like the GW event GW170817, can be exploited to constrain the equation of state (EoS) of matter in the stars' inner core. The information on…

General Relativity and Quantum Cosmology · Physics 2019-05-02 Tiziano Abdelsalhin

Gravitational-wave signals from coalescing binary neutron stars can yield important information about the properties of nuclear-matter equation of state from the early part of the signal through tidal effects to the properties and…

High Energy Astrophysical Phenomena · Physics 2021-09-13 Harry Ho-Yin Ng , Patrick Chi-Kit Cheong , Lap-Ming Lin , Tjonnie Guang Feng Li

We study the implications of the recent detection of gravitational waves emitted by a pair of merging neutron stars and their electromagnetic counterpart, events GW170817 and GRB170817A, on the viability of the doubly coupled bimetric…

Cosmology and Nongalactic Astrophysics · Physics 2018-06-15 Yashar Akrami , Philippe Brax , Anne-Christine Davis , Valeri Vardanyan

The excitation of $f$-mode in a neutron star member of coalescing binaries accelerates the merger course, and thereby introduces a phase shift in the gravitational waveform. Emphasising on the tidal phase shift by aligned, rotating stars,…

General Relativity and Quantum Cosmology · Physics 2022-10-12 Hao-Jui Kuan , Kostas D. Kokkotas

Gravitational Wave (GW) observations from Neutron Stars (NS) in a binary system provide an excellent scenario to constrain the nuclear parameters. The investigation of Pratten et al. (2022) has shown that the ignorance of f-mode dynamical…

General Relativity and Quantum Cosmology · Physics 2024-04-30 Bikram Keshari Pradhan , Tathagata Ghosh , Dhruv Pathak , Debarati Chatterjee

The combined detection of a binary neutron-star merger in both gravitational waves (GWs) and electromagnetic (EM) radiation spanning the entire spectrum -- GW170817 / AT2017gfo / GRB170817A -- marks a breakthrough in the field of…

High Energy Astrophysical Phenomena · Physics 2021-02-05 Michael W. Coughlin , Tim Dietrich , Ben Margalit , Brian D. Metzger

During the last seconds of a binary neutron-star merger, the tidal force can excite stellar oscillation modes to large amplitudes. From the perspective of premerger electromagnetic emissions and next-generation gravitational-wave detectors,…

High Energy Astrophysical Phenomena · Physics 2026-01-14 Alexis Reboul-Salze , Aurélie Astoul , Hao-Jui Kuan , Arthur G. Suvorov

Gravitational waves from neutron-star mergers are expected to provide stringent constraints on the structure of neutron stars. At the same time, recent advances in nuclear theory have enabled reliable calculations of the low density…

Nuclear Theory · Physics 2019-09-04 I. Tews , J. Margueron , S. Reddy

Gravitational waves from the collision of binary neutron stars provide a unique opportunity to study the behaviour of supranuclear matter, the fundamental properties of gravity, and the cosmic history of our Universe. However, given the…

General Relativity and Quantum Cosmology · Physics 2022-11-02 Gregory Ashton , Tim Dietrich

Neutron stars are unique testbeds for exploring the physics of strongly interacting matter in extreme regimes of density, temperature, and isospin that are not accessible anywhere else in the universe. The nature of neutron star matter can…

Nuclear Theory · Physics 2019-12-04 Andreas Guerra Chaves , Tanja Hinderer

The tidal deformation of a neutron star in a binary inspiral driven by the emission of gravitational waves affects the orbital dynamics and produces a measurable modulation of the waves. Late in the inspiral, a regime of dynamical tides…

General Relativity and Quantum Cosmology · Physics 2025-06-11 Tristan Pitre , Eric Poisson

The tidal deformability probability distribution extracted from GW170817 alone, or including multi-messenger information, is confronted to astrophysical and nuclear physics additional constraints within a semi-agnostic approach for the…

Nuclear Theory · Physics 2020-07-31 H. Güven , K. Bozkurt , E. Khan , J. Margueron

The dynamical tide in a coalescing neutron star binary induces phase shifts in the gravitational waveform as the orbit sweeps through resonances with individual g-modes. Unlike the phase shift due to the equilibrium tide, the phase shifts…

High Energy Astrophysical Phenomena · Physics 2017-06-30 Hang Yu , Nevin N. Weinberg

The recent detection of gravitational waves (GWs) from the neutron star binary inspiral GW170817 has opened a unique avenue to probe matter and fundamental interactions in previously unexplored regimes. Extracting information on neutron…

General Relativity and Quantum Cosmology · Physics 2019-10-07 Patricia Schmidt , Tanja Hinderer