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The electromagnetic (EM) emission associated with a gravitational wave (GW) signal is one of the main goal of future astronomy. Merger of neutron stars and/or black holes and core-collapse of massive stars are expected to cause rapid…

Next-generation gravitational wave (GW) observatories, such as the Einstein Telescope (ET) and Cosmic Explorer, will observe binary neutron star (BNS) mergers across cosmic history, providing precise parameter estimates for the closest…

Simulations of binary neutron stars have seen great advances in terms of physical detail and numerical quality. However, the spin of the neutron stars, one of the simplest global parameters of binaries, remains mostly unstudied. We present…

General Relativity and Quantum Cosmology · Physics 2015-04-15 Sebastiano Bernuzzi , Tim Dietrich , Wolfgang Tichy , Bernd Bruegmann

Mergers of binary neutron stars and black hole-neutron star binaries produce gravitational-wave (GW) emission and outflows with significant kinetic energies. These outflows result in radio emissions through synchrotron radiation. We explore…

High Energy Astrophysical Phenomena · Physics 2016-11-15 Kenta Hotokezaka , Samaya Nissanke , Gregg Hallinan , T. Joseph W. Lazio , Ehud Nakar , Tsvi Piran

Gravitational waves were discovered with the detection of binary black hole mergers and they should also be detectable from lower mass neutron star mergers. These are predicted to eject material rich in heavy radioactive isotopes that can…

High Energy Astrophysical Phenomena · Physics 2017-10-18 S. J. Smartt , T. -W. Chen , A. Jerkstrand , M. Coughlin , E. Kankare , S. A. Sim , M. Fraser , C. Inserra , K. Maguire , K. C. Chambers , M. E. Huber , T. Kruhler , G. Leloudas , M. Magee , L. J. Shingles , K. W. Smith , D. R. Young , J. Tonry , R. Kotak , A. Gal-Yam , J. D. Lyman , D. S. Homan , C. Agliozzo , J. P. Anderson , C. R. Angus C. Ashall , C. Barbarino , F. E. Bauer , M. Berton , M. T. Botticella , M. Bulla , J. Bulger , G. Cannizzaro , Z. Cano , R. Cartier , A. Cikota , P. Clark , A. De Cia , M. Della Valle , L. Denneau , M. Dennefeld , L. Dessart , G. Dimitriadis , N. Elias-Rosa , R. E. Firth , H. Flewelling , A. Flors , A. Franckowiak , C. Frohmaier , L. Galbany , S. Gonzalez-Gaitan , J. Greiner , M. Gromadzki , A. Nicuesa Guelbenzu , C. P. Gutierrez , A. Hamanowicz , L. Hanlon , J. Harmanen , K. E. Heintz , A. Heinze , M. -S. Hernandez , S. T. Hodgkin , I. M. Hook , L. Izzo , P. A. James , P. G. Jonker , W. E. Kerzendorf , S. Klose , Z. Kostrzewa-Rutkowska , M. Kowalski , M. Kromer , H. Kuncarayakti , A. Lawrence , T. B. Lowe , E. A. Magnier , I. Manulis , A. Martin-Carrillo , S. Mattila , O. McBrien , A. Muller , J. Nordin , D. O'Neill , F. Onori , J. T. Palmerio , A. Pastorello , F. Patat , G. Pignata , Ph. Podsiadlowski , M. L. Pumo , S. J. Prentice , A. Rau , A. Razza , A. Rest , T. Reynolds , R. Roy , A. J. Ruiter , K. A. Rybicki , L. Salmon , P. Schady , A. S. B. Schultz , T. Schweyer , I. R. Seitenzahl , M. Smith , J. Sollerman , B. Stalder , C. W. Stubbs , M. Sullivan , H. Szegedi , F. Taddia , S. Taubenberger , G. Terreran , B. van Soelen , J. Vos , R. J. Wainscoat , N. A. Walton , C. Waters , H. Weiland , M. Willman , P. Wiseman , D. E. Wright , L. Wyrzykowski , O. Yaron

We present a systematic numerical-relativity study of the dynamical ejecta, winds and nucleosynthesis in neutron star merger remnants. Binaries with the chirp mass compatible with GW170817, different mass ratios, and five microphysical…

The final inspiral of double neutron star and neutron star-black hole binaries are likely to be detected by advanced networks of ground-based gravitational wave (GW) interferometers. Maximizing the science returns from such a discovery will…

High Energy Astrophysical Phenomena · Physics 2015-05-30 Brian D. Metzger , Edo Berger

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 combine gravitational wave (GW) and electromagnetic (EM) data to perform a Bayesian parameter estimation of the binary neutron star (NS) merger GW170817. The EM likelihood is constructed from a fit to a large number of numerical…

High Energy Astrophysical Phenomena · Physics 2019-04-15 David Radice , Liang Dai

With GW170817 being the only multimessenger gravitational wave (GW) event with an associated kilonova detected so far, there exists a pressing need for realistic estimation of the GW localization uncertainties and rates, as well as…

Binary neutron star mergers observations are a unique way to constrain fundamental physics and astrophysics at the extreme. The interpretation of gravitational-wave events and their electromagnetic counterparts crucially relies on…

High Energy Astrophysical Phenomena · Physics 2020-11-18 Sebastiano Bernuzzi

The first direct detection of the gravitational wave (GW) event GW170817 and its electromagnetic (EM) counterpart open a new window for studying of multi-messenger astronomy. However, how to identify the remnant of binary neutron star (NS)…

High Energy Astrophysical Phenomena · Physics 2025-08-22 Suo-Ning Wang , Hou-Jun Lü , Xiao-Xuan Liu , Jared Rice , Jia Ren , En-Wei Liang

The merger of neutron star binaries is believed to eject a wide range of heavy elements into the universe. By observing the emission from this ejecta, scientists can probe the ejecta properties (mass, velocity and composition…

A binary neutron star merger is expected to be associated by a kilonova, transient optical emission powered by radioactive decay of the neutron-rich ejecta. If the post-merger remnant is a long-lived neutron star, additional energy…

High Energy Astrophysical Phenomena · Physics 2022-09-21 Shunke Ai , Bing Zhang , Zhaohuan Zhu

We discuss two approaches to searches for gravitational-wave (GW) and electromagnetic (EM) counterparts of binary neutron star mergers. The first approach relies on triggering archival searches of GW detector data based on detections of EM…

High Energy Astrophysical Phenomena · Physics 2015-06-03 Ilya Mandel , Luke Z. Kelley , Enrico Ramirez-Ruiz

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 (BNS) merger, GW170817, was the first success story of multi-messenger observations of compact binary mergers. The inferred merger rate along with the increased sensitivity of the ground-based…

Instrumentation and Methods for Astrophysics · Physics 2020-06-24 Deep Chatterjee , Shaon Ghosh , Patrick R. Brady , Shasvath J. Kapadia , Andrew L. Miller , Samaya Nissanke , Francesco Pannarale

The first direct detection of gravitational waves (GW) by the ground-based interferometers is expected to occur within the next few years. These interferometers will detect the mergers of compact object binaries composed of neutron stars…

Instrumentation and Methods for Astrophysics · Physics 2016-06-15 P. S. Cowperthwaite , E. Berger

The discovery of a radioactively powered kilonova associated with the binary neutron star merger GW170817 was the first - and still only - confirmed electromagnetic counterpart to a gravitational-wave event. However, observations of…

A non-negligible fraction of binary neutron star mergers are expected to form long-lived neutron star remnants, dramatically altering the multi-messenger signatures of a merger. Here, we extend existing models for magnetar-driven kilonovae…

High Energy Astrophysical Phenomena · Physics 2022-09-21 Nikhil Sarin , Conor M. B. Omand , Ben Margalit , David I. Jones