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Observations of short-duration gamma-ray bursts and their afterglows show that a good fraction (perhaps $\gtrsim50\%$) of binary neutron star mergers lead to strongly magnetized, rapidly rotating pulsars (including millisecond magnetars),…

High Energy Astrophysical Phenomena · Physics 2019-02-22 Z. G. Dai

The increase in the sensitivity of gravitational wave interferometers will bring additional detections of binary black hole and double neutron star mergers. It will also very likely add many merger events of black hole - neutron star…

High Energy Astrophysical Phenomena · Physics 2021-09-06 Bhavesh Khamesra , Miguel Gracia-Linares , Pablo Laguna

[ABRIDGED] We study supermassive black hole binary mergers driven by angular momentum loss to small-scale gas discs. Such binaries form after major galaxy mergers, but their fate is unclear since hardening through stellar scattering becomes…

Astrophysics · Physics 2009-03-08 J. Cuadra , P. J. Armitage , R. D. Alexander , M. C. Begelman

Here we discuss the evolution of binaries around MBH in nuclear stellar clusters. We focus on their secular evolution due to the perturbation by the MBH, while simplistically accounting for their collisional evolution. Binaries with highly…

Astrophysics of Galaxies · Physics 2015-06-19 Snezana Prodan , Fabio Antonini , Hagai B. Perets

This paper, and its companion, investigate the evolution of dense stellar systems due to the influence of two-body gravitational encounters, physical collisions and stellar evolution. Our goal is the simulation of the densest centers of…

Astrophysics · Physics 2007-05-23 John S. Arabadjis , Douglas O. Richstone

Ground-based gravitational-wave detectors like the Advanced LIGO, Advanced Virgo, and KAGRA experiments now regularly witness gravitational waves from compact binary mergers: the relativistic collisions of neutron stars and/or stellar-mass…

High Energy Astrophysical Phenomena · Physics 2024-10-28 T. A. Callister

Within the framework of general relativity, it can be shown that gravitational waves are radiated with the merger of massive compact objects. Such gravitational wave signals are observed on Earth on various detectors, in particular, on…

Cosmology and Nongalactic Astrophysics · Physics 2025-05-02 Alexander Libanov

We present an improved search for binary compact-object mergers using a network of ground-based gravitational-wave detectors. We model a volumetric, isotropic source population and incorporate the resulting distribution over signal…

General Relativity and Quantum Cosmology · Physics 2018-05-29 Alexander H. Nitz , Thomas Dent , Tito Dal Canton , Stephen Fairhurst , Duncan A. Brown

The duration of orbital decay induced by gravitational waves (GWs) is often the bottleneck of the evolutionary phases going from star formation to a merger. We show here that kicks imparted to the newly born compact object during the second…

High Energy Astrophysical Phenomena · Physics 2024-04-03 Paz Beniamini , Tsvi Piran

Observations of gravitational radiation from compact binary systems provide an unprecedented opportunity to test General Relativity in the strong field dynamical regime. In this paper, we investigate how future observations of gravitational…

General Relativity and Quantum Cosmology · Physics 2018-03-21 Laura Sagunski , Jun Zhang , Matthew C. Johnson , Luis Lehner , Mairi Sakellariadou , Steven L. Liebling , Carlos Palenzuela , David Neilsen

The main features of the gravitational dynamics of binary neutron star systems are now well established. While the inspiral can be precisely described in the post-Newtonian approximation, fully relativistic magneto-hydrodynamical…

High Energy Astrophysical Phenomena · Physics 2020-10-23 Matteo Lucca , Laura Sagunski , Federico Guercilena , Christian M. Fromm

Star clusters can interact and merge in galactic discs, halos, or centers. We present direct N-body simulations of binary mergers of star clusters with $M_{\star} = 2.7 \times 10^4 \: \mathrm{M_{\odot}}$ each, using the N-body code BIFROST…

Astrophysics of Galaxies · Physics 2025-03-18 Lazaros Souvaitzis , Antti Rantala , Thorsten Naab

We estimate the long-lasting gravitational wave (GW) emission of compact dark objects following a binary neutron-star (NS) merger. We consider compact dark objects, which initially reside in the centers of NSs and which may consist of…

High Energy Astrophysical Phenomena · Physics 2023-10-13 Andreas Bauswein , Gang Guo , Jr-Hua Lien , Yen-Hsun Lin , Meng-Ru Wu

The detections of gravitational waves produced in mergers of binary black holes (BH) and neutron stars (NS) by LIGO/Virgo have stimulated interest in the origin of the progenitor binaries. Dense stellar systems - globular and nuclear star…

Astrophysics of Galaxies · Physics 2019-08-19 Chris Hamilton , Roman R. Rafikov

To enable detection and maximise the physics output of gravitational wave observations from compact binary systems, it is crucial the availability of accurate waveform models. The present work aims at giving an overview for non-experts of…

General Relativity and Quantum Cosmology · Physics 2021-09-22 Soichiro Isoyama , Riccardo Sturani , Hiroyuki Nakano

Compact object mergers eject neutron-rich matter in a number of ways: by the dynamical ejection mediated by gravitational torques, as neutrino-driven winds and probably also a good fraction of the resulting accretion disc finally becomes…

High Energy Astrophysical Phenomena · Physics 2015-06-11 S. Rosswog

Mergers of black holes and other compact objects produce gravitational waves which carry a part of the energy, momentum, and angular momentum of the system. Due to asymmetry in the gravitational wave emission, a recoil kick velocity is…

Astrophysics of Galaxies · Physics 2023-08-11 Dipanweeta Bhattacharyya , Jasjeet Singh Bagla

Globular clusters are considered to be likely breeding grounds for compact binary mergers. In this paper, we demonstrate how the gravitational-wave signals produced by compact object mergers can act as tracers of globular cluster formation…

High Energy Astrophysical Phenomena · Physics 2021-07-14 Isobel M. Romero-Shaw , Kyle Kremer , Paul D. Lasky , Eric Thrane , Johan Samsing

Some fraction of compact binaries that merge within a Hubble time may have formed from two massive stars in isolation. For this isolated-binary formation channel, binaries need to survive two supernova (SN) explosions in addition to…

High Energy Astrophysical Phenomena · Physics 2019-11-06 A. Miguel Holgado , Paul M. Ricker

The infall and merger scenario of massive clusters in the Milky Way's potential well, as one of the Milky Way formation mechanisms, is reexamined to understand how the stars of the merging clusters are redistributed during and after the…

Astrophysics of Galaxies · Physics 2023-06-21 Maria Gabriela Navarro , Roberto Capuzzo-Dolcetta , Manuel Arca-Sedda , Dante Minniti
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