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The observations of optical and near-infrared counterparts of binary neutron star mergers not only enrich our knowledge about the abundance of heavy elements in the Universe, or help reveal the remnant object just after the merger as…

High Energy Astrophysical Phenomena · Physics 2023-02-09 Zhenyu Zhu , Ang Li , Tong Liu

The Multimessenger discovery of the merger of two neutron stars on August 17, 2017, GW170817 / GRB170817A, accompanied by a gamma-ray burst and an optical kilonova, is a triumph of the ideas about the evolution of the baryon component in…

High Energy Astrophysical Phenomena · Physics 2018-05-15 Vladimir Lipunov , Victor Kornilov , Evgeny Gorbovskoy , Galina Lipunova , Daniil Vlasenko , I. Panchenko , N. V. Tyurina , V. Grinshpun

With the first multi-messenger observation of a binary neutron star merger (GW170817) new constraints became available for masses and radii of neutron stars. We introduce a class of hybrid EoS that fulfils all these constraints and predicts…

High Energy Astrophysical Phenomena · Physics 2023-01-31 David Blaschke , Mateusz Cierniak

On August 17, 2017 at 12:41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with a combined signal-to-noise ratio of…

General Relativity and Quantum Cosmology · Physics 2017-10-17 The LIGO Scientific Collaboration , The Virgo Collaboration

The tidal measurement of gravitational waves from the binary neutron star merger event GW170817 allows us to probe nuclear physics that suffers less from astrophysical systematics compared to neutron star radius measurements with…

General Relativity and Quantum Cosmology · Physics 2021-01-19 Zack Carson , Andrew W. Steiner , Kent Yagi

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

GW170817/GRB170817A, a short gamma-ray burst arising from a low-mass compact object merger was the first multi-messenger discovery of a compact binary system outside the local galactic neighborhood. From gravitational-wave measurements, we…

High Energy Astrophysical Phenomena · Physics 2018-10-23 Chris Pankow

Gravitational-wave observation together with a large number of electromagnetic observations shows that the source of the latest gravitational-wave event, GW170817, detected primarily by advanced LIGO, is the merger of a binary neutron star.…

High Energy Astrophysical Phenomena · Physics 2017-12-27 Masaru Shibata , Sho Fujibayashi , Kenta Hotokezaka , Kenta Kiuchi , Koutarou Kyutoku , Yuichiro Sekiguchi , Masaomi Tanaka

The observation of GW170817, the first binary neutron star merger observed in both gravitational waves (GW) and electromagnetic (EM) waves, kickstarted the age of multi-messenger GW astronomy. This new technique presents an observationally…

High Energy Astrophysical Phenomena · Physics 2023-11-20 Geoffrey Mo , Rahul Jayaraman , Danielle Frostig , Michael M. Fausnaugh , Erik Katsavounidis , George R. Ricker

We study the implications of the recent detection of gravitational waves emitted by a pair of merging neutron stars and their electromagnetic counterpart, events GW170817 and GRB170817A, on the viability of the doubly coupled bimetric…

Cosmology and Nongalactic Astrophysics · Physics 2018-06-15 Yashar Akrami , Philippe Brax , Anne-Christine Davis , Valeri Vardanyan

In recent years, there have been significant advances in multi-messenger astronomy due to the discovery of the first, and so far only confirmed, gravitational wave event with a simultaneous electromagnetic (EM) counterpart, as well as…

Gravitational-wave observations of binary neutron star coalescences constrain the neutron-star equation of state by enabling measurement of the tidal deformation of each neutron star. This deformation is determined by the tidal…

High Energy Astrophysical Phenomena · Physics 2020-11-18 Francisco Hernandez Vivanco , Rory Smith , Eric Thrane , Paul D. Lasky

On August 17, 2017 the LIGO-Virgo collaboration detected for the first time gravitational waves from the binary merger of two neutron stars (GW170817). Unlike the merger of two black holes, the associated electromagnetic radiation was also…

Nuclear Theory · Physics 2019-05-01 J. Piekarewicz

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst…

High Energy Astrophysical Phenomena · Physics 2017-10-25 LIGO Scientific Collaboration , Virgo Collaboration , Fermi GBM , INTEGRAL , IceCube Collaboration , AstroSat Cadmium Zinc Telluride Imager Team , IPN Collaboration , The Insight-Hxmt Collaboration , ANTARES Collaboration , The Swift Collaboration , AGILE Team , The 1M2H Team , The Dark Energy Camera GW-EM Collaboration , the DES Collaboration , The DLT40 Collaboration , GRAWITA , : , GRAvitational Wave Inaf TeAm , The Fermi Large Area Telescope Collaboration , ATCA , : , Australia Telescope Compact Array , ASKAP , : , Australian SKA Pathfinder , Las Cumbres Observatory Group , OzGrav , DWF , AST3 , CAASTRO Collaborations , The VINROUGE Collaboration , MASTER Collaboration , J-GEM , GROWTH , JAGWAR , Caltech- NRAO , TTU-NRAO , NuSTAR Collaborations , Pan-STARRS , The MAXI Team , TZAC Consortium , KU Collaboration , Nordic Optical Telescope , ePESSTO , GROND , Texas Tech University , SALT Group , TOROS , : , Transient Robotic Observatory of the South Collaboration , The BOOTES Collaboration , MWA , : , Murchison Widefield Array , The CALET Collaboration , IKI-GW Follow-up Collaboration , H. E. S. S. Collaboration , LOFAR Collaboration , LWA , : , Long Wavelength Array , HAWC Collaboration , The Pierre Auger Collaboration , ALMA Collaboration , Euro VLBI Team , Pi of the Sky Collaboration , The Chandra Team at McGill University , DFN , : , Desert Fireball Network , ATLAS , High Time Resolution Universe Survey , RIMAS , RATIR , SKA South Africa/MeerKAT

The constancy of the gravitational constant $G$ is a cornerstone of the strong equivalence principle and of general relativity, yet its possible temporal variation remains a key target in tests of fundamental physics. Gravitational-wave…

General Relativity and Quantum Cosmology · Physics 2026-03-27 Jie Zhu , Hanlin Song , Zhenwei Lyu , Hao Li , Peixiang Ji , Jun-Chen Wang , Haobo Yan , Bo-Qiang Ma

Measurement of macroscopic properties of neutron stars, whether in binary or in an isolated system, provides us a key opportunity to place a stringent constraint on its equation of state. In this paper, we perform Bayesian model-selection…

High Energy Astrophysical Phenomena · Physics 2022-03-28 Bhaskar Biswas

Neutron stars (NSs) are extraordinary not only because they are the densest form of matter in the visible Universe but also because they can generate B-fields ten orders of magnitude larger than those currently constructed on Earth. The…

High Energy Astrophysical Phenomena · Physics 2021-04-09 Milton Ruiz , Stuart L. Shapiro , Antonios Tsokaros

The first detection of gravitational waves from a neutron star-neutron star merger, GW170817, has opened up a new avenue for constraining the ultradense-matter equation of state (EOS). The deviation of the observed waveform from a…

High Energy Astrophysical Phenomena · Physics 2019-06-26 Carolyn A. Raithel

The gravitational-wave events GW170817 and GW190425 have led to a number of important insights on the equation of state of dense matter and the properties of neutron stars, such as their radii and the maximum mass. Some of these conclusions…

High Energy Astrophysical Phenomena · Physics 2022-04-20 L. Jens Papenfort , Elias R. Most , Samuel Tootle , Luciano Rezzolla

With the first observation of a binary neutron star merger through gravitational waves and light GW170817, compact binary mergers have now taken the center stage in nuclear astrophysics. They are thought to be one of the main astrophysical…

High Energy Astrophysical Phenomena · Physics 2020-02-11 David Radice , Sebastiano Bernuzzi , Albino Perego