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Binary neutron star (BNS) mergers are the leading model to explain the phenomenology of short gamma-ray bursts (SGRBs), which are among the most luminous explosions in the universe. Recent observations of long-lasting X-ray afterglows of…

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

We present numerical results of three-dimensional simulations for the merger of binary neutron stars (BNSs) in full general relativity. Hybrid equations of state (EOSs) are adopted to mimic realistic nuclear EOSs. In this approach, we…

General Relativity and Quantum Cosmology · Physics 2009-11-11 Masaru Shibata , Keisuke Taniguchi , Koji Uryu

We report results of a numerical-relativity simulation for the merger of a black hole-neutron star binary with a variety of equations of state (EOSs) modeled by piecewise polytropes. We focus in particular on the dependence of the…

High Energy Astrophysical Phenomena · Physics 2017-12-27 Koutarou Kyutoku , Masaru Shibata , Keisuke Taniguchi

Most galaxies have central massive black holes (BH), and merge with others during their evolution, as strongly suggested by recent observations. Consequently a black hole binary (BHB) emerges. Considering the evolution of the binary when it…

Astrophysics · Physics 2009-11-06 Christian Zier , Peter L. Biermann

Beginning from massive binaries in the Galaxy we evolve black-hole, neutron-star binaries and binary neutron stars, such as the Hulse-Taylor system PSR 1913+16. The new point in our evolution is a quantitative calculation of the accretion…

Astrophysics · Physics 2008-11-26 Hans A. Bethe , G. E. Brown

Coalescing black hole (BH) binaries forming in the dense core of globular clusters (GCs) are expected to be one the brightest sources of gravitational wave (GW) radiation for the next generation of ground-based laser interferometers.…

High Energy Astrophysical Phenomena · Physics 2015-06-16 Fabio Antonini , Norman Murray , Seppo Mikkola

Stellar mass, binary black hole (BBH) mergers dominates the sources of gravitational wave (GW) events so far detected by the LIGO/Virgo/KAGRA (LVK) experiment. The origin of these BBHs is unknown, and no electromagnetic (EM) counterpart has…

High Energy Astrophysical Phenomena · Physics 2025-03-28 Juan C. Rodríguez-Ramírez , Rodrigo Nemmen , Clécio R. Bom

Binary black-holes (BHs) and binary neutron-stars (NSs) mergers had been recently detected through gravitational-wave (GW) emission, with the latter followed by post-merger electromagnetic counterparts, appearing seconds up to weeks after…

High Energy Astrophysical Phenomena · Physics 2018-03-21 Erez Michaely , Hagai B. Perets

The merger of neutron star (NS)-NS binary can form different production of the compact remnant, among which the supramassive NS (SMNS) could create an internal plateau and the followed steep decay marks the collapse of the SMNS. The…

High Energy Astrophysical Phenomena · Physics 2024-05-06 Yun-Peng Li , Zhi-Lin Chen , Da-Bin Lin , En-Wei Liang

We elucidate the feature of gravitational waves (GWs) from binary neutron star merger collapsing to a black hole by general relativistic simulation. We show that GW spectrum imprints the coalescence dynamics, formation process of disk,…

High Energy Astrophysical Phenomena · Physics 2010-04-14 Kenta Kiuchi , Yuichiro Sekiguchi , Masaru Shibata , Keisuke Taniguchi

Binary black holes (BBHs) are one of the endpoints of isolated binary evolution, and their mergers a leading channel for gravitational wave events. Here, using the evolutionary code \textsc{StarTrack}, we study the statistical properties of…

High Energy Astrophysical Phenomena · Physics 2018-04-19 Rosalba Perna , Martyna Chruslinska , Alessandra Corsi , Krzysztof Belczynski

Stellar black hole (BH) binaries are one of the most promising gravitational wave (GW) sources for GW detection by the ground-based detectors. Nuclear star clusters (NCs) located at the centre of galaxies are known to harbour massive black…

Astrophysics of Galaxies · Physics 2015-02-13 Jongsuk Hong , Hyung Mok Lee

Making the most of the rapidly increasing population of gravitational-wave detections of black hole (BH) and neutron star (NS) mergers requires comparing observations with population synthesis predictions. In this work we investigate the…

Next-generation gravitational wave (GW) observatories, such as the Einstein Telescope (ET) and Cosmic Explorer, will observe binary neutron star (BNS) mergers across cosmic history, providing precise parameter estimates for the closest…

Using grid-based hydrodynamics simulations and analytic modeling, we compute the electromagnetic (EM) signatures of gravitational wave (GW) driven inspirals of massive black hole binaries that accrete gas from circumbinary disks, exploring…

High Energy Astrophysical Phenomena · Physics 2025-02-26 Jonathan Zrake , Madeline Clyburn , Samuel Feyan

In this paper, we investigate the properties of binary neutron stars (BNSs) and their mergers by combining population synthesis models for binary stellar evolution (BSE) with cosmological galaxy formation and evolution models. We obtain…

Astrophysics of Galaxies · Physics 2021-10-20 Qingbo Chu , Shenghua Yu , Youjun Lu

We present the first effective-one-body (EOB) model for generic-spins quasi-circular black-hole--neutron-star (BHNS) inspiral-merger-ringdown gravitational waveforms (GWs). Our model is based on a new numerical-relativity (NR) informed…

General Relativity and Quantum Cosmology · Physics 2023-04-26 Alejandra Gonzalez , Rossella Gamba , Matteo Breschi , Francesco Zappa , Gregorio Carullo , Sebastiano Bernuzzi , Alessandro Nagar

We perform population synthesis of massive binaries to study the mergers of neutron stars (NSs) and black holes (BHs) with the cores of their giant secondaries during common envelope evolution (CEE). We use different values of the…

High Energy Astrophysical Phenomena · Physics 2023-06-08 Aldana Grichener

Context: Mergers of neutron stars (NS) and black holes (BH) are among the strongest sources of gravitational waves and are potential central engines for short gamma-ray bursts. Aims: We aim to compare the general relativistic (GR) results…

High Energy Astrophysical Phenomena · Physics 2015-03-13 M. Ruffert , H. -Th. Janka

Merging binary neutron stars (BNSs) represent the ultimate targets for multimessenger astronomy, being among the most promising sources of gravitational waves (GWs), and, at the same time, likely accompanied by a variety of electromagnetic…

High Energy Astrophysical Phenomena · Physics 2017-05-02 Riccardo Ciolfi , Wolfgang Kastaun , Bruno Giacomazzo , Andrea Endrizzi , Daniel M. Siegel , Rosalba Perna
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