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Standard siren cosmology of gravitational wave (GW) merger events relies on the identification of host galaxies and their redshifts. But this can be highly challenging due to numerous candidates of galaxies in the GW localization area. We…

Cosmology and Nongalactic Astrophysics · Physics 2020-07-15 Hai Yu , Pengjie Zhang , Fa-Yin Wang

We present a proof-of-concept study, based on numerical-relativity simulations, of how gravitational waves (GWs) from neutron star merger remnants can probe the nature of matter at extreme densities. Phase transitions and extra degrees of…

High Energy Astrophysical Phenomena · Physics 2017-06-16 David Radice , Sebastiano Bernuzzi , Walter Del Pozzo , Luke F. Roberts , Christian D. Ott

We investigate joint low-latency gravitational wave (GW) detection and prompt electromagnetic (EM) follow-up observations of coalescing binary neutron stars (BNSs). Assuming that BNS mergers are associated with short duration gamma ray…

High Energy Astrophysical Phenomena · Physics 2016-06-22 E. J. Howell , Q. Chu , A. Rowlinson , H. Gao , B. Zhang , S. J. Tingay , M. Boer , L. Wen

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

High-redshift gamma-ray bursts (GRBs), putative counterparts of massive, low-metallicity Population III (Pop III) stars, are a promising probe of the first stars. We assess the detectability of these Pop III GRBs using a metallicity-based…

High Energy Astrophysical Phenomena · Physics 2025-12-05 Jun-Jie Wei , Qing-Bo Ma , Xue-Feng Wu

We combine electromagnetic (EM) and gravitational wave (GW) information on the binary neutron star (NS) merger GW170817 in order to constrain the radii $R_{\rm ns}$ and maximum mass $M_{\rm max}$ of NSs. GW170817 was followed by a range of…

High Energy Astrophysical Phenomena · Physics 2017-12-06 Ben Margalit , Brian Metzger

Third Generation ground based Gravitational Wave Interferometers, like the Einstein Telescope (ET), Cosmic Explorer (CE), and the Laser Interferometer Space Antenna (LISA) will detectcoalescing binary black holes over a wide mass spectrum…

We evaluate the redshift distribution of binary black hole (BBH), black hole - neutron star binary (BHNS) and binary neutron star (BNS) mergers, exploring the main sources of uncertainty: star formation rate (SFR) density, metallicity…

High Energy Astrophysical Phenomena · Physics 2021-02-12 Filippo Santoliquido , Michela Mapelli , Nicola Giacobbo , Yann Bouffanais , M. Celeste Artale

Astrophysical scenarios for the formation and evolution of intermediate-mass black holes (IMBHs) in the mass range $10^2 M_\odot \lesssim M \lesssim 10^6 M_\odot$ remain uncertain, but future ground-based gravitational-wave (GW)…

General Relativity and Quantum Cosmology · Physics 2024-11-12 Luca Reali , Roberto Cotesta , Andrea Antonelli , Konstantinos Kritos , Vladimir Strokov , Emanuele Berti

Some recent, long-term numerical simulations of binary neutron star mergers have shown that the long-lived remnants produced in such mergers might be affected by convective instabilities. Those would trigger the excitation of inertial…

General Relativity and Quantum Cosmology · Physics 2023-06-14 Miquel Miravet-Tenés , Florencia L. Castillo , Roberto De Pietri , Pablo Cerdá-Durán , José A. Font

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

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

The merger of close binary systems containing two neutron stars should produce a burst of gravitational waves, as predicted by the theory of general relativity. A reliable estimate of the double-neutron-star merger rate in the Galaxy is…

The Einstein Telescope (ET), a planned third-generation gravitational-wave (GW) observatory, will offer significantly improved sensitivity, introducing new challenges for data analysis and computing. To prepare for these demands, the ET…

General Relativity and Quantum Cosmology · Physics 2026-03-09 Regimbau Tania , Suresh Jishnu

We demonstrate by a large set of merger simulations for symmetric binary neutron stars (NSs) that there is a tight correlation between the frequency peak of the postmerger gravitational-wave (GW) emission and the physical properties of the…

Solar and Stellar Astrophysics · Physics 2015-05-28 A. Bauswein , H. -Th. Janka

Observations of the properties of multiple coalescing neutron stars will simultaneously provide insight into neutron star mass and spin distribution, the neutron star merger rate, and the nuclear equation of state. Not all merging binaries…

General Relativity and Quantum Cosmology · Physics 2020-01-08 Daniel Wysocki , Richard O'Shaughnessy , Leslie Wade , Jacob Lange

The equation of state plays a critical role in the physics of the merger of two neutron stars. Recent numerical simulations with microphysical equation of state suggest the outcome of such events depends on the mass of the neutron stars.…

High Energy Astrophysical Phenomena · Physics 2015-06-22 J. Clark , A. Bauswein , L. Cadonati , H. -T. Janka , C. Pankow , N. Stergioulas

The first direct observation of a binary neutron star (BNS) merger was a watershed moment in multi-messenger astronomy. However, gravitational waves from GW170817 have only been observed prior to the BNS merger, but electromagnetic…

General Relativity and Quantum Cosmology · Physics 2020-01-07 Jahed Abedi , Niayesh Afshordi

Six gravitational wave detections have been reported so far, providing crucial insights on the merger rate of double compact objects. We investigate the cosmic merger rate of double neutron stars (DNSs), neutron star-black hole binaries…

High Energy Astrophysical Phenomena · Physics 2018-07-04 Michela Mapelli , Nicola Giacobbo