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The simultaneous detection of gravitational and electromagnetic waves from a binary neutron star merger has both solidified the link between neutron star mergers and short-duration gamma-ray bursts (GRBs) and demonstrated the ability of…

High Energy Astrophysical Phenomena · Physics 2018-10-10 Brandon K. Wiggins , Christopher L. Fryer , Joseph M. Smidt , Dieter H. Hartmann , Nicole Lloyd-Ronning , Chris Belcynski

While there are a number of proposed formation channels for subsolar mass compact objects, including black holes formed primordially, or neutron stars that form in collapsar disks, there have yet to be any conclusive observations of such…

High Energy Astrophysical Phenomena · Physics 2026-03-27 Maxence Corman , William E. East , Jocelyn S. Read

With planned space-based and 3rd generation ground-based gravitational wave detectors (LISA, Einstein Telescope, Cosmic Explorer), and proposed DeciHz detectors (DECIGO, Big Bang Observer), it is timely to explore statistical cosmological…

Cosmology and Nongalactic Astrophysics · Physics 2024-05-24 Charlie T. Mpetha , Giuseppe Congedo , Andy Taylor

The first detection of gravitational waves from a merging double neutron star (DNS) binary implies a much higher rate of DNS coalescences in the local Universe than typically estimated on theoretical grounds. The recent study by Chruslinska…

High Energy Astrophysical Phenomena · Physics 2020-02-19 Martyna Chruslinska

Binary black hole mergers encode information about their environment and the astrophysical processes that led to their formation. Measuring the redshift dependence of their merger rate will help probe the formation and evolution of galaxies…

High Energy Astrophysical Phenomena · Physics 2020-07-01 Y. Yang , I. Bartos , Z. Haiman , B. Kocsis , S. Márka , H. Tagawa

The formation channels of binary neutron stars (BNSs) remain uncertain. The detection of GW190425 by LIGO/Virgo/KAGRA (LVK) suggests a subpopulation of massive BNSs, possibly formed through unstable "case BB" mass transfer with short merger…

High Energy Astrophysical Phenomena · Physics 2025-12-03 Alexandre Toubiana , Irina Dvorkin

The mass and distance of a binary black hole (BBH) are fundamental parameters to measure in gravitational-wave (GW) astronomy. It is well-known that the measurement is affected by cosmological redshift, and recent works also showed that…

High Energy Astrophysical Phenomena · Physics 2023-03-29 Xiaoyue Zhang , Xian Chen

The first multimessenger discovery of a binary neutron star (BNS) merger, GW170817, proved that such mergers can source short gamma-ray bursts (SGRBs) and produce \rprocess elements. The initial merger rate from this single event in the…

High Energy Astrophysical Phenomena · Physics 2026-04-08 Maya Fishbach , Alexander P. Ji , Wen-fai Fong , Tom Y. Wu , Jillian C. Rastinejad , Aditya Vijaykumar , Hsin-Yu Chen

Detection of gravitational waves from the inspiral phase of binary neutron star coalescence will allow us to measure the effects of the tidal coupling in such systems. These effects will be measurable using 3rd generation gravitational wave…

General Relativity and Quantum Cosmology · Physics 2015-05-28 Chris Messenger , Jocelyn Read

The precise measurement of neutron star (NS) spins can provide important insight into the formation and evolution of compact binaries containing NS. While traditional methods of NS spin measurement rely on pulsar observations, gravitational…

High Energy Astrophysical Phenomena · Physics 2024-08-01 Ish Gupta

Binary neutron stars (BNS) mergers are prime sites for $r$-process nucleosynthesis. Their rate determines the chemical evolution of heavy elements in the Milky Way. The merger rate of BNS is a convolution of their birth rate and the…

High Energy Astrophysical Phenomena · Physics 2019-08-19 Paz Beniamini , Tsvi Piran

Recent gravitational wave observations include possible detections of black hole - neutron star binary mergers. As with binary black hole mergers, numerical simulations help characterize the sources. For binary systems with neutron star…

General Relativity and Quantum Cosmology · Physics 2024-04-16 Bing-Jyun Tsao , Bhavesh Khamesra , Miguel Gracia-Linares , Pablo Laguna

The Einstein Telescope (ET) is a proposed third-generation, wide-band gravitational wave (GW) detector which will have an improved detection sensitivity in low frequencies, leading to a longer observation time in the detection band and…

High Energy Astrophysical Phenomena · Physics 2025-05-27 Neha Singh , Tomasz Bulik , Aleksandra Olejak

The environment surrounding supermassive black holes (SMBHs) in galactic nuclei (GNs) is expected to harbour stellar-mass binary black hole (BBH) populations. These binaries were suggested to form a hierarchical triple system with the SMBH,…

High Energy Astrophysical Phenomena · Physics 2022-12-21 László Gondán

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

Binary black hole (BBH) mergers detected through Gravitational Waves (GWs) are a promising probe for the cosmic expansion. These sources are standard sirens for which we can directly measure the luminosity distance, but their redshift is…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-17 Arianna Scarpa , Simone Mastrogiovanni , Filippo Santoliquido , Manuel Arca-Sedda

Black hole-neutron star (BHNS) binaries are expected to be among the leading sources of gravitational waves observable by ground-based detectors, and may be the progenitors of short-hard gamma ray bursts (SGRBs) as well. Here, we discuss…

Detection of massive binary black hole (BBH) mergers at high redshifts is a target for LISA space mission. While the individual masses of a BBH merger are redshifted, the mass ratio of BBH mergers is independent of their redshift.…

Cosmology and Nongalactic Astrophysics · Physics 2022-12-14 Mohammadtaher Safarzadeh , Karan Jani , Nianyi Chen , Tiziana DiMatteo , Abraham Loeb

The detection of electromagnetic radiation (EM) accompanying the gravitational wave (GW) signal from the binary neutron star (BNS) merger GW170817 has revealed that these systems constitute at least a fraction of the progenitors of short…

High Energy Astrophysical Phenomena · Physics 2022-03-30 Rosalba Perna , M. Celeste Artale , Yi-Han Wang , Michela Mapelli , Davide Lazzati , Cecilia Sgalletta , Filippo Santoliquido

The unprecedented range of second-generation gravitational-wave (GW) observatories calls for refining the predictions of potential sources and detection rates. The coalescence of double compact objects (DCOs)---i.e., neutron star-neutron…

High Energy Astrophysical Phenomena · Physics 2015-07-07 M. Dominik , E. Berti , R. O'Shaughnessy , I. Mandel , K. Belczynski , C. Fryer , D. Holz , T. Bulik , F. Pannarale