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Determining the equation of state of matter at nuclear density and hence the structure of neutron stars has been a riddle for decades. We show how the imminent detection of gravitational waves from merging neutron star binaries can be used…

General Relativity and Quantum Cosmology · Physics 2014-09-05 Kentaro Takami , Luciano Rezzolla , Luca Baiotti

A number of works have shown that important information on the equation of state of matter at nuclear density can be extracted from the gravitational waves emitted by merging neutron-star binaries. We present a comprehensive analysis of the…

General Relativity and Quantum Cosmology · Physics 2016-06-29 Luciano Rezzolla , Kentaro Takami

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

Gravitational-wave echoes in the post-merger ringdown phase are under intense scrutiny as probes of near-horizon quantum structures and as signatures of exotic states of matter in ultracompact stars. We present an analytical template that…

General Relativity and Quantum Cosmology · Physics 2018-09-18 Adriano Testa , Paolo Pani

We introduce an efficient and straightforward technique for rapidly detecting gravitational waves from compact binary mergers. We show that this method achieves the low latencies required to alert electromagnetic partners of candidate…

General Relativity and Quantum Cosmology · Physics 2018-08-08 Alexander H. Nitz , Tito Dal Canton , Derek Davis , Steven Reyes

We present a study aimed at quantifying the detectability of radio counterparts of binary neutron star (BNS) mergers with total masses $\lesssim 3$\,M$_{\odot}$, which may form neutron star (NS) remnants. We focus on mergers localized by…

High Energy Astrophysical Phenomena · Physics 2025-07-01 Kara Merfeld , Alessandra Corsi

We present a search for gravitational waves from merging binary neutron stars which have non-negligible eccentricity as they enter the LIGO observing band. We use the public Advanced LIGO data which covers the period from 2015 through 2017…

High Energy Astrophysical Phenomena · Physics 2020-03-24 Alexander H. Nitz , Amber Lenon , Duncan A. Brown

We present a search for merging compact binary gravitational-wave sources that produce a signal appearing solely or primarily in a single detector. Past analyses have heavily relied on coincidence between multiple detectors to reduce…

High Energy Astrophysical Phenomena · Physics 2020-08-28 Alexander H. Nitz , Thomas Dent , Gareth S. Davies , Ian Harry

The Advanced LIGO and Virgo gravitational wave observatories have opened a new window with which to study the inspiral and mergers of binary compact objects. These observations are most powerful when coordinated with multi-messenger…

General Relativity and Quantum Cosmology · Physics 2021-10-29 Zhi-Qiang You , Gregory Ashton , Xing-Jiang Zhu , Eric Thrane , Zong-Hong Zhu

One of the key challenges of real-time detection and parameter estimation of gravitational waves from compact binary mergers is the computational cost of conventional matched-filtering and Bayesian inference approaches. In particular, the…

Instrumentation and Methods for Astrophysics · Physics 2021-07-30 Plamen G. Krastev , Kiranjyot Gill , V. Ashley Villar , Edo Berger

The postmerger gravitational-wave (GW) signal of a binary neutron star (BNS) merger is expected to contain valuable information that could shed light on the equation of state (EOS) of NSs, the properties of the matter produced during the…

High Energy Astrophysical Phenomena · Physics 2022-05-04 Aditya Vijaykumar , Shasvath J. Kapadia , Parameswaran Ajith

We present a search for binary neutron star mergers that produced gravitational-waves during the first observing run of Advanced LIGO and gamma-ray emission seen by either \textit{Swift}-BAT or Fermi-GBM, similar to GW170817 and GRB…

High Energy Astrophysical Phenomena · Physics 2019-06-11 Alexander H. Nitz , Alex B. Nielsen , Collin D. Capano

In this article, I introduce ideas and techniques to extract information about the equation of state of matter at very high densities from gravitational waves emitted before, during and after the merger of binary neutron stars. I also…

High Energy Astrophysical Phenomena · Physics 2019-09-30 Luca Baiotti

Gravitational waves in the postmerger phase of binary neutron star mergers may become detectable with planned upgrades of existing gravitational-wave detectors or with more sensitive next-generation detectors. The construction of template…

General Relativity and Quantum Cosmology · Physics 2024-05-16 Dimitrios Pesios , Ioannis Koutalios , Dimitris Kugiumtzis , Nikolaos Stergioulas

Merging neutron star (NS) binaries may be detected by ground-based gravitational wave (GW) interferometers (e.g. LIGO/VIRGO) within this decade and may also generate electromagnetic radiation detectable by wide-field, fast imaging…

High Energy Astrophysical Phenomena · Physics 2015-06-12 Dong Lai

Multimessenger observations of the binary neutron star merger GW170817 have enabled the discovery of a diverse array of electromagnetic counterparts to compact binary mergers, including an unambiguous kilonova, a short gamma-ray burst, and…

Following the historical observation of GW170817 and its electromagnetic follow-up, new neutron star merger afterglows are expected to be observed as counterparts to gravitational wave signals during the next science runs of the…

High Energy Astrophysical Phenomena · Physics 2020-03-25 Raphaël Duque , Robert Mochkovitch , Frédéric Daigne

The first gravitational wave detections of mergers between black holes and neutron stars represent a remarkable new regime of high-energy transient astrophysics. The signals observed with LIGO-Virgo detectors come from mergers of extreme…

Solar and Stellar Astrophysics · Physics 2018-08-15 Matthias U. Kruckow , Thomas M. Tauris , Norbert Langer , Michael Kramer , Robert G. Izzard

Binary neutron-star mergers offer crucial insights into the matter properties of neutron stars. We present the possible imprints in the gravitational wave signal from the nature of phase transition from such events. Our study employs a…

High Energy Astrophysical Phenomena · Physics 2026-04-29 Sagnik Chatterjee , Shamim Haque , Kamal Krishna Nath , Rana Nandi , Ritam Mallick

Gravitational-wave echoes in the post-merger signal of a binary coalescence are predicted in various scenarios, including near-horizon quantum structures, exotic states of matter in ultracompact stars, and certain deviations from general…

General Relativity and Quantum Cosmology · Physics 2019-10-10 Elisa Maggio , Adriano Testa , Swetha Bhagwat , Paolo Pani
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