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GW170817 represents the first observed binary neutron star merger event by humanity. The observation of GW170817 has identified the correlation between Kilonova, gravitational wave and short GRB. The shocks from GW170817 have the capacity…

High Energy Astrophysical Phenomena · Physics 2024-03-14 Menquan Liu , Jie Zhang , Cong Wang

The spectral features in the optical/near-infrared counterparts of neutron star mergers (kilonovae, KNe), evolve dramatically on hour timescales. To examine the spectral evolution we compile a temporal series complete at all observed epochs…

High Energy Astrophysical Phenomena · Physics 2024-10-30 Albert Sneppen , Darach Watson , Rasmus Damgaard , Kasper E. Heintz , Nicholas Vieira , Petri Väisänen , Antoine Mahoro

We introduce an efficient and straightforward technique for rapidly detecting gravitational waves from compact binary mergers. We show that this method achieves the low latencies required to alert electromagnetic partners of candidate…

General Relativity and Quantum Cosmology · Physics 2018-08-08 Alexander H. Nitz , Tito Dal Canton , Derek Davis , Steven Reyes

The detection of gravitational waves from binary neuron star merger GW170817 and electromagnetic counterparts GRB170817 and AT2017gfo kick-started the field of gravitational wave multimessenger astronomy. The optically red to near infra-red…

Gravitational waves have been detected from the inspiral of a binary neutron-star, GW170817, which allowed constraints to be placed on the neutron star equation of state. The equation of state can be further constrained if gravitational…

General Relativity and Quantum Cosmology · Physics 2019-08-14 Paul J. Easter , Paul D. Lasky , Andrew R. Casey , Luciano Rezzolla , Kentaro Takami

A merger of binary neutron stars creates heavy unstable elements whose radioactive decay produces a thermal emission known as a kilonova. In this paper, we predict the photometric and polarimetric behaviour of this emission by performing…

High Energy Astrophysical Phenomena · Physics 2023-05-31 Manisha Shrestha , Mattia Bulla , Lorenzo Nativi , Ivan Markin , Stephan Rosswog , Tim Dietrich

The merger of two neutron stars produces an outflow of radioactive heavy nuclei. Within a second of merger, the central remnant is expected to also launch a relativistic jet, which shock-heats and disrupts a portion of the radioactive…

High Energy Astrophysical Phenomena · Physics 2021-01-20 Hannah Klion , Paul C. Duffell , Daniel Kasen , Eliot Quataert

The discovery of gravitational waves from a neutron star merger in 2017 (GW170817) and the associated kilonova (AT2017gfo) confirmed these events as key sites for heavy element production through the r-process. Subsequent observations,…

Atomic Physics · Physics 2025-09-11 Jérôme Deprince , Lucas Maison

The electromagnetic (EM) follow-up of a gravitational wave (GW) event requires to scan a wide sky region, defined by the so called "skymap", for the detection and identification of a transient counterpart. We propose a novel method that…

High Energy Astrophysical Phenomena · Physics 2017-09-19 Om S. Salafia , Monica Colpi , Marica Branchesi , Eric Chassande-Mottin , Giancarlo Ghirlanda , Gabriele Ghisellini , Susanna Vergani

The detection of the gravitational wave event GW230529, presumably a neutron star-black hole (NSBH) merger, by the LIGO-Virgo-KAGRA (LVK) Collaboration marks an exciting discovery for multimessenger astronomy. The black hole (BH) has a high…

High Energy Astrophysical Phenomena · Physics 2025-10-14 Keerthi Kunnumkai , Antonella Palmese , Mattia Bulla , Tim Dietrich , Amanda M. Farah , Peter T. H. Pang

The multi-messenger detection of the gravitational-wave signal GW170817, the corresponding kilonova AT2017gfo and the short gamma-ray burst GRB170817A, as well as the observed afterglow has delivered a scientific breakthrough. For an…

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

The multi-messenger observation of the next galactic core-collapse supernova will shed light on the different physical processes involved in these energetic explosions. Good timing and pointing capabilities of neutrino detectors would help…

High Energy Astrophysical Phenomena · Physics 2020-09-18 Alexis Coleiro , Marta Colomer Molla , Damien Dornic , Massimiliano Lincetto , Vladimir Kulikovskiy

In binary neutron star mergers, lanthanide-rich dynamical ejecta and lanthanide-poor post-merger ejecta have been often linked to the red and blue kilonova emission, respectively. However, analytic light curve modeling of kilonova often…

High Energy Astrophysical Phenomena · Physics 2025-02-17 Ayari Kitamura , Kyohei Kawaguchi , Masaomi Tanaka , Sho Fujibayashi

With the detection of gravitational wave (GW) GW170817 and its associated electromagnetic (EM) counterparts from a binary neutron star (NS) merger, the "standard siren" method for Hubble-constant measurements is expected to play a role in…

High Energy Astrophysical Phenomena · Physics 2020-04-21 Zoheyr Doctor

We present a comprehensive, configurable open-source framework for estimating the rate of electromagnetic detection of kilonovae (KNe) associated with gravitational wave detections of binary neutron star (BNS) mergers. We simulate the…

High Energy Astrophysical Phenomena · Physics 2023-11-30 Ved G. Shah , Gautham Narayan , Haille M. L. Perkins , Ryan J. Foley , Deep Chatterjee , Bryce Cousins , Phillip Macias

We simulate the optical searching of gravitational-wave electromagnetic counterpart of the binary neutron star (BNS) merger event (i.e., a kilonova) using the ground based {\it SiTian} project prototype telescope with a 5-min limiting…

High Energy Astrophysical Phenomena · Physics 2025-04-03 Zhirui Li , Hongrui Gu , Yongkang Sun , Yang Huang , Youjun Lu , Jifeng Liu

We explore the electromagnetic counterparts that will associate with binary neutron star mergers for the case that remnant massive neutron stars survive for $\gtrsim 0.5\,$s after the merger. For this study, we employ the outflow profiles…

High Energy Astrophysical Phenomena · Physics 2022-08-31 Kyohei Kawaguchi , Sho Fujibayashi , Kenta Hotokezaka , Masaru Shibata , Shinya Wanajo

The first neutron star (NS) merger observed by advanced LIGO and Virgo, GW170817, and its fireworks of electromagnetic counterparts across the entire electromagnetic spectrum marked the beginning of multi-messenger astronomy and…

High Energy Astrophysical Phenomena · Physics 2019-12-24 Daniel M. Siegel

An energetic $\rm \gamma$-ray burst (GRB), GRB 211211A, was observed on 2021 December 11 by the Neil Gehrels Swift Observatory. Despite its long duration, typically associated with bursts produced by the collapse of massive stars, the…

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