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The combined detection of a binary neutron-star merger in both gravitational waves (GWs) and electromagnetic (EM) radiation spanning the entire spectrum -- GW170817 / AT2017gfo / GRB170817A -- marks a breakthrough in the field of…

High Energy Astrophysical Phenomena · Physics 2021-02-05 Michael W. Coughlin , Tim Dietrich , Ben Margalit , Brian D. Metzger

Observations of neutron-star mergers based on distinct messengers, including gravitational waves and electromagnetic signals, can be used to study the behavior of matter denser than an atomic nucleus, and to measure the expansion rate of…

High Energy Astrophysical Phenomena · Physics 2020-12-22 Tim Dietrich , Michael W. Coughlin , Peter T. H. Pang , Mattia Bulla , Jack Heinzel , Lina Issa , Ingo Tews , Sarah Antier

The electromagnetic radiation that followed the neutron star merger event GW170817 revealed that gamma-ray burst afterglows from jets misaligned with our line of sight exhibit a light curve with slowly rising flux. The slope of the rising…

High Energy Astrophysical Phenomena · Physics 2021-03-01 Hao Wang , Dimitrios Giannios

The simultaneous detection of gravitational waves and light from the binary neutron star merger GW170817 led to independent measurements of distance and redshift, providing a direct estimate of the Hubble constant $H_0$ that does not rely…

High Energy Astrophysical Phenomena · Physics 2022-05-20 Mattia Bulla , Michael W. Coughlin , Suhail Dhawan , Tim Dietrich

Multi-messenger astronomy was galvanized by the detection of gravitational waves (GWs) from the binary neutron star (BNS) merger GW170817 and electromagnetic (EM) emission from the subsequent kilonova and short gamma ray burst. Maximizing…

High Energy Astrophysical Phenomena · Physics 2025-12-02 Nathan Steinle , Samar Safi-Harb , Matt Nicholl , Isabelle Worssam , Benjamin P. Gompertz

The very first detection of gravitational waves from a neutron star binary merger, GW170817, exceeded all expectations. The event was relatively nearby, which may point to a relatively high merger rate. It was possible to extract…

High Energy Astrophysical Phenomena · Physics 2021-03-31 Andreas Bauswein

We describe the first observations of the same celestial object with gravitational waves and light. * GW170817 was the first detection of a neutron star merger with gravitational waves. * The detection of a spatially coincident weak burst…

High Energy Astrophysical Phenomena · Physics 2021-12-01 Raffaella Margutti , Ryan Chornock

We reassess the capacity for multimessenger inference of AT2017gfo/GW170817 using both kilonova and gravitational wave emission within the context of a recent simulation-based surrogate model for kilonova emission. Independent of the…

In light of the recent dazzling discovery of GW170817, we discuss several new scientific opportunities that would emerge in multi-messenger time-domain astrophysics if a facility like the next generation Very Large Array (ngVLA) were to…

Instrumentation and Methods for Astrophysics · Physics 2018-10-18 Alessandra Corsi , Dale A. Frail , Davide Lazzati , Dario Carbone , Eric J. Murphy , Benjamin J. Owen , David J. Sand , Richard O'Shaughnessy

The multi-messenger data of neutron star merger events are promising for constraining the Hubble constant. So far, GW170817 is still the unique gravitational wave event with multi-wavelength electromagnetic counterparts. In particular, its…

High Energy Astrophysical Phenomena · Physics 2023-02-01 Yi-Ying Wang , Shao-Peng Tang , Zhi-Ping Jin , Yi-Zhong Fan

We study the gravitational-wave trigger GW231109_235456, a sub-threshold binary neutron star merger candidate observed in the first part of the fourth observing run of the LIGO-Virgo-KAGRA collaboration. Assuming the trigger is of…

High Energy Astrophysical Phenomena · Physics 2025-10-28 Thibeau Wouters , Anna Puecher , Peter T. H. Pang , Tim Dietrich

Neutron star mergers, referring to both binary neutron star and neutron star black hole mergers, are the canonical multimessenger events. They have been detected across the electromagnetic spectrum, have recently been detected in…

The binary neutron star merger GW170817 was the first multi-messenger event observed in both gravitational and electromagnetic waves. The electromagnetic signal began approximately 2 seconds post-merger with a weak, short burst of…

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

Binary neutron star mergers offer a new and independent means of measuring the Hubble constant $H_0$ by combining the gravitational-wave inferred source luminosity distance with its redshift obtained from electromagnetic follow-up. This…

High Energy Astrophysical Phenomena · Physics 2022-01-27 S. Mastrogiovanni , R. Duque , E. Chassande-Mottin , F. Daigne , R. Mochkovitch

Following the historical observations of GW170817 and its multi-wavelength afterglow, more radio afterglows from neutron star mergers are expected in the future as counterparts to gravitational wave inspiral signals. We wish to describe…

High Energy Astrophysical Phenomena · Physics 2019-10-23 Raphaël Duque , Frédéric Daigne , Robert Mochkovitch

We present a rapid analytic framework for predicting kilonova light curves following neutron star (NS) mergers, where the main input parameters are binary-based properties measurable by gravitational wave detectors (chirp mass and mass…

High Energy Astrophysical Phenomena · Physics 2021-07-07 Matt Nicholl , Ben Margalit , Patricia Schmidt , Graham P. Smith , Evan J. Ridley , James Nuttall

The detection of the binary neutron star GW170817 together with the observation of electromagnetic counterparts across the entire spectrum inaugurated a new era of multi-messenger astronomy. In this study we incorporate wavelength-dependent…

To date GW170817, produced by a binary neutron star (BNS) merger, is the only gravitational wave event with an electromagnetic (EM) counterpart. It was associated with a prompt short gamma-ray burst (GRB), an optical kilonova, and the…

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