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We demonstrate Bayesian analyses of the complete gravitational-wave spectrum of binary neutron star mergers events with the next-generation detector Einstein Telescope. Our mock analyses are performed for 20 different signals using the…

General Relativity and Quantum Cosmology · Physics 2026-02-12 Giulia Huez , Sebastiano Bernuzzi , Matteo Breschi , Rossella Gamba

Recent observations indicate that in a large fraction of binary neutron star (BNS) mergers a long-lived neutron star (NS) may be formed rather than a black hole. Unambiguous electromagnetic (EM) signatures of such a scenario would strongly…

High Energy Astrophysical Phenomena · Physics 2016-03-16 Daniel M. Siegel , Riccardo Ciolfi

We analyze the distinguishability of populations of coalescing binary neutron stars, neutron-star black-hole binaries, and binary black holes, whose gravitational-wave signatures are expected to be observed by the advanced network of…

High Energy Astrophysical Phenomena · Physics 2015-05-05 Ilya Mandel , Carl-Johan Haster , Michal Dominik , Krzysztof Belczynski

With the rapid advancements in next-generation ground-based gravitational wave (GW) detectors, it is anticipated that $10^3$-$10^5$ binary neutron star (BNS) mergers per year will be detected, with a significant fraction accompanied by…

High Energy Astrophysical Phenomena · Physics 2025-12-04 Zhiwei Chen , Youjun Lu , Hao Ma , Qingbo Chu

Observations of gravitational waves from binary black hole (BBH) mergers have measured the redshift evolution of the BBH merger rate. The number density of galaxies in the Universe evolves differently with redshift based on their physical…

High Energy Astrophysical Phenomena · Physics 2025-02-05 Aditya Vijaykumar , Maya Fishbach , Susmita Adhikari , Daniel E. Holz

Binary neutron star (BNS) post-merger gravitational-wave emission can occur in the aftermath of a BNS merger -- provided the system avoids prompt collapse to a black hole -- as a quasistable hypermassive remnant experiences quadrupolar…

GW190425 was the second gravitational wave (GW) signal compatible with a binary neutron star (BNS) merger detected by the Advanced LIGO and Advanced Virgo detectors. Since no electromagnetic counterpart was identified, whether the…

High Energy Astrophysical Phenomena · Physics 2024-01-25 A. Camilletti , L. Chiesa , G. Ricigliano , A. Perego , L. C. Lippold , S. Padamata , S. Bernuzzi , D. Radice , D. Logoteta , F. M. Guercilena

A relativistic jet has been produced in the single well-localised binary neutron star (BNS) merger detected to date in gravitational waves (GWs), and the local rates of BNS mergers and short gamma-ray bursts are of the same order of…

High Energy Astrophysical Phenomena · Physics 2022-10-26 O. S. Salafia , A. Colombo , F. Gabrielli , I. Mandel

Binaries comprised of a neutron star (NS) and a black hole (BH) have so far eluded observations as pulsars and with gravitational waves (GWs). We model the formation and evolution of these NS+BH binaries - including pulsar evolution - using…

High Energy Astrophysical Phenomena · Physics 2021-04-21 Debatri Chattopadhyay , Simon Stevenson , Jarrod R. Hurley , Matthew Bailes , Floor Broekgaarden

Identifying the host galaxy of a binary black hole (BBH) merger detected via gravitational waves (GWs) remains a challenge due to the absence of electromagnetic counterparts and the large localization volumes produced by current-generation…

High Energy Astrophysical Phenomena · Physics 2026-02-10 Sumedha Biswas , Andrew Levan , Peter G. Jonker , Kendall Ackley , Gregory Ashton , Nikhil Sarin

Almost a hundred compact binary mergers have been detected via gravitational waves by the LIGO-Virgo-KAGRA collaboration in the past few years providing us with a significant amount of new information on black holes and neutron stars. In…

High Energy Astrophysical Phenomena · Physics 2023-12-12 Kutay A. Çokluk , Kadri Yakut , Bruno Giacomazzo

With a fantastic sensitivity improving significantly over the advanced GW detectors, Einstein Telescope (ET) will be able to observe hundreds of thousand inspiralling double compact objects per year. By virtue of gravitational lensing…

High Energy Astrophysical Phenomena · Physics 2018-03-07 Xuheng Ding , Marek Biesiada , Zong-Hong Zhu

Binary neutron star (NS) mergers are among the most promising sources of gravitational waves (GWs), as well as candidate progenitors for short Gamma-Ray Bursts (SGRBs). Depending on the total initial mass of the system, and the NS equation…

High Energy Astrophysical Phenomena · Physics 2015-06-22 Simone Dall'Osso , Bruno Giacomazzo , Rosalba Perna , Luigi Stella

Short gamma-ray bursts (SGRBs) observed by {\it Swift} are potentially revealing the first insight into cataclysmic compact object mergers. To ultimately acquire a fundamental understanding of these events requires pan-spectral observations…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 David Coward , Eric Howell , Tsvi Piran , Giulia Stratta , Marica Branchesi , Omer Bromberg , Bruce Gendre , Ronald Burman , Dafne Guetta

Two neutron stars merge somewhere in the Universe approximately every 10 seconds, creating violent explosions observable in gravitational waves and across the electromagnetic spectrum. The transformative coincident gravitational-wave and…

High Energy Astrophysical Phenomena · Physics 2022-02-21 Nikhil Sarin , Paul D. Lasky

The next generation of gravitational-wave observatories will achieve unprecedented strain sensitivities with an expanded observing band. They will detect ${\cal O}(10^5)$ binary neutron star (BNS) mergers every year, the loudest of which…

General Relativity and Quantum Cosmology · Physics 2025-11-17 A. Makai Baker , Paul D. Lasky , Eric Thrane , Jacob Golomb

Kilonovae are approximately thermal transients, produced by mergers of binary neutron stars (BNSs) and NS-black hole binaries. As the optical counterpart of the gravitational wave event GW170817, AT2017gfo is the first kilonova detected…

High Energy Astrophysical Phenomena · Physics 2023-04-25 Zheng-Yan Liu , Zhe-Yu Lin , Ji-Ming Yu , Hui-Yu Wang , Gibran-Marc Mourani , Wen Zhao , Zi-Gao Dai

Two neutron star (NS)-black hole (BH) binaries, GW200105 and GW200115 found in the LIGO/Virgo O3b run have smaller BH mass of 6--9\,$M_{\odot}$ which is consistent with Population I and II origin. Our population synthesis simulations using…

High Energy Astrophysical Phenomena · Physics 2022-07-20 Tomoya Kinugawa , Takashi Nakamura , Hiroyuki Nakano

Binary neutron star mergers are important to understand stellar evolution, the chemical enrichment of the universe via the r-process, the physics of short gamma-ray bursts, gravitational waves and pulsars. The rates at which these…

Stochastic gravitational waves (GWs) consist of a primordial component from early Universe processes and an astrophysical component from compact binary mergers. To detect the primordial stochastic GW background (SGWB), the astrophysical…

General Relativity and Quantum Cosmology · Physics 2025-01-08 Mingzheng Li , Jiming Yu , Zhen Pan