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Early detection and localization of gravitational waves (GWs) are essential for identifying electromagnetic (EM) counterparts, playing a key role in multi-messenger astronomy. However, second-generation (2G) ground-based detectors are most…

General Relativity and Quantum Cosmology · Physics 2026-05-01 Tao Yang , Rong-Gen Cai , Zhoujian Cao , Hyung Mok Lee

Advanced LIGO and Virgo have reported 90 confident gravitational-wave (GW) observations from compact-binary coalescences from their three observation runs. In addition, numerous subthreshold gravitational-wave candidates have been…

High Energy Astrophysical Phenomena · Physics 2022-10-19 Yi-Fan Wang , Alexander H. Nitz

In August 2017, the first detection of a binary neutron star merger, GW170817, made it possible to study neutron stars in compact binary systems using gravitational waves. Despite being the loudest gravitational wave event detected to date…

General Relativity and Quantum Cosmology · Physics 2023-01-24 Stephanie M. Brown , Collin D. Capano , Badri Krishnan

Gravitational Waves (GWs) from coalescing binaries carry crucial information about their component sources, like mass, spin and tidal effects. This implies that the analysis of GW signals from binary neutron star mergers can offer unique…

High Energy Astrophysical Phenomena · Physics 2024-01-17 Shriya Soma , Horst Stöcker , Kai Zhou

We present a comprehensive study of the effectiveness of Convolution Neural Networks (CNNs) to detect long duration transient gravitational-wave signals lasting $O(hours-days)$ from isolated neutron stars. We determine that CNNs are robust…

The multi-messenger detection of the gravitational-wave signal GW170817, the corresponding kilonova AT2017gfo and the short gamma-ray burst GRB170817A, as well as the observed afterglow has delivered a scientific breakthrough. For an…

The spectral properties of the post-merger gravitational-wave signal from a binary of neutron stars encode a variety of information about the features of the system and of the equation of state describing matter around and above nuclear…

General Relativity and Quantum Cosmology · Physics 2023-10-18 Konrad Topolski , Samuel Tootle , Luciano Rezzolla

The detection and characterization of post-merger gravitational wave signals from binary neutron star mergers remains challenging with current ground-based detectors. We present a convolutional neural network framework designed for…

Instrumentation and Methods for Astrophysics · Physics 2026-01-06 Roo Weerasinghe

The joint detection of the gravitational wave (GW) event GW170817 and the short-duration gamma-ray burst (SGRB) event GRB 170817A, marked the beginning of GW multi-messenger astronomy and confirmed that binary neutron star mergers are…

High Energy Astrophysical Phenomena · Physics 2024-05-31 Luyanda Mazwi , Soebur Razzaque , Lutendo Nyadzani

The nature of the merger remnant of binary neutron star (BNS) remains an open question. From the theoretical point of view, one possible outcome is a supra-massive neutron star (SMNS), which is supported by rigid rotation and through its…

High Energy Astrophysical Phenomena · Physics 2023-05-10 Yong Yuan , Xi-Long Fan , Hou-Jun Lv

The Global Positioning System (GPS) includes a continuously operating, planet-scale network of atomic clocks that, beyond navigation and time dissemination, enables precision tests of fundamental physics. Here we use GPS carrier phase…

Instrumentation and Methods for Astrophysics · Physics 2026-02-18 Arko P. Sen , Geoffrey Blewitt , Andrey Sarantsev , Paul Ries , Andrei Derevianko

The double neutron star (DNS) merger event GW170817 signifies the first multimessenger (MM) event with electromagnetic-gravitational (EM-GW) observations. LIGO-Virgo-KAGRA observational runs O4-5 promise to detect similar events and as yet…

High Energy Astrophysical Phenomena · Physics 2023-08-16 Maryam A. Abchouyeh , Maurice H. P. M. van Putten , Lorenzo Amati

Gravitational-wave observations became commonplace in Advanced LIGO-Virgo's recently concluded third observing run. 56 non-retracted candidates were identified and publicly announced in near real time. Gravitational waves from binary…

The Multimessenger discovery of the merger of two neutron stars on August 17, 2017, GW170817 / GRB170817A, accompanied by a gamma-ray burst and an optical kilonova, is a triumph of the ideas about the evolution of the baryon component in…

High Energy Astrophysical Phenomena · Physics 2018-05-15 Vladimir Lipunov , Victor Kornilov , Evgeny Gorbovskoy , Galina Lipunova , Daniil Vlasenko , I. Panchenko , N. V. Tyurina , V. Grinshpun

The early and precise localization of gravitational waves (GWs) is pivotal in detecting their electromagnetic (EM) counterparts, especially for binary neutron stars (BNS) and neutron star-black hole binaries (NSBH). In this letter, we…

General Relativity and Quantum Cosmology · Physics 2024-05-15 Tao Yang , Rong-Gen Cai , Zhoujian Cao , Hyung Mok Lee

We derive a Bayesian criterion for assessing whether signals observed in two separate data sets originate from a common source. The Bayes factor for a common vs. unrelated origin of signals includes an overlap integral of the posterior…

High Energy Astrophysical Phenomena · Physics 2018-06-13 Gregory Ashton , Eric Burns , Tito Dal Canton , Thomas Dent , Heinz-Bernd Eggenstein , Alex B. Nielsen , Reinhard Prix , Michal Was , Sylvia J. Zhu

Making an unambiguous detection of lensed gravitational waves is challenging with current generation detectors due to large uncertainties in sky localisations and other inferred parameter distributions. However, in the case of binary…

Within the next few years, Advanced LIGO and Virgo should detect gravitational waves from binary neutron star and neutron star-black hole mergers. These sources are also predicted to power a broad array of electromagnetic transients.…

General Relativity and Quantum Cosmology · Physics 2016-01-20 Leo P. Singer , Larry R. Price

In light of the recent dazzling discovery of GW170817, we discuss several new scientific opportunities that would emerge in multi-messenger time-domain astrophysics if a facility like the next generation Very Large Array (ngVLA) were to…

Instrumentation and Methods for Astrophysics · Physics 2018-10-18 Alessandra Corsi , Dale A. Frail , Davide Lazzati , Dario Carbone , Eric J. Murphy , Benjamin J. Owen , David J. Sand , Richard O'Shaughnessy

The post-merger gravitational wave (GW) radiation of the remnant formed in the binary neutron star (BNS) coalescence has not been directly measured, yet. We show in this work that the properties of the BNS involved in GW170817, additionally…

High Energy Astrophysical Phenomena · Physics 2020-12-04 Yi-Zhong Fan , Jin-Liang Jiang , Shao-Peng Tang , Zhi-Ping Jin , Da-Ming Wei