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Mergers of binary neutron stars (BNSs) emit signals in both the gravitational-wave (GW) and electromagnetic (EM) spectra. Famously, the 2017 multi-messenger observation of GW170817 led to scientific discoveries across cosmology, nuclear…

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

We present fully GRMHD simulations of the merger of binary neutron star (BNS) systems. We consider BNSs producing a hypermassive neutron star (HMNS) that collapses to a spinning black hole (BH) surrounded by a magnetized accretion disk in a…

High Energy Astrophysical Phenomena · Physics 2016-10-31 Takumu Kawamura , Bruno Giacomazzo , Wolfgang Kastaun , Riccardo Ciolfi , Andrea Endrizzi , Luca Baiotti , Rosalba Perna

The presence and detectability of coherent radio emission from compact binary mergers (containing at least one neutron star) remains poorly constrained due to large uncertainties in the models. These compact binary mergers may initially be…

High Energy Astrophysical Phenomena · Physics 2019-09-04 A. Rowlinson , G. E. Anderson

The cosmic variance on the star formation history may lead to bias to the merger rate density estimation of binary neutron star (BNS) mergers by the compact binary population synthesis. In this paper, we take the advantage of the large…

High Energy Astrophysical Phenomena · Physics 2024-09-02 Zhiwei Chen , Youjun Lu , Jie Wang , Zhen Jiang , Qingbo Chu , Xianghao Ma

Next-generation gravitational wave detectors are expected to detect millions of compact binary mergers across cosmological distances. The features of the mass distribution of these mergers, combined with gravitational wave distance…

Cosmology and Nongalactic Astrophysics · Physics 2025-05-30 Soumendra Kishore Roy , Lieke A. C. van Son , Anarya Ray , Will M. Farr

Most of fast radio bursts (FRB) do not show evidence for repetition, and such non-repeating FRBs may be produced at the time of a merger of binary neutron stars (BNS), provided that the BNS merger rate is close to the high end of the…

High Energy Astrophysical Phenomena · Physics 2018-04-18 Shotaro Yamasaki , Tomonori Totani , Kenta Kiuchi

The precise origin of short gamma ray bursts (SGRBs) remains an important open question in relativistic astrophysics. Increasingly, observational evidence suggests the merger of a binary compact object system as the source for most SGRBs,…

High Energy Astrophysical Phenomena · Physics 2014-03-21 Nicholas Stone , Abraham Loeb , Edo Berger

The multi-messenger observation of gamma-ray burst (GRB)\,170817A from the nearby binary neutron-star merger GW170817 demonstrated that low-energy $\gamma$-ray emission can be observed at relatively large angles from GRB jet axes. If such…

High Energy Astrophysical Phenomena · Physics 2019-03-20 Imre Bartos , Kyung-hwan Lee , Alessandra Corsi , Zsuzsa Marka , Szabolcs Marka

Merging binary systems consisting of two collapsed objects are among the most promising sources of high frequency gravitational wave, GW, signals for ground based interferometers. Double neutron star or black hole/neutron star mergers are…

Astrophysics · Physics 2015-05-13 Dafne Guetta , Luigi Stella

The gravitational waves from the binary neutron star merger GW170817 were accompanied by a multi-wavelength electromagnetic counterpart, which confirms the association of the merger with a short gamma-ray burst (sGRB). The afterglow…

High Energy Astrophysical Phenomena · Physics 2023-04-05 Matteo Pais , Tsvi Piran , Yuri Lyubarsky , Kenta Kiuchi , Masaru Shibata

The discovery of GW170817 with gravitational waves (GWs) and electromagnetic (EM) radiation is prompting new questions in strong-gravity astrophysics. Importantly, it remains unknown whether the progenitor of the merger comprised two…

A binary neutron star (BNS) merger can lead to various outcomes, from indefinitely stable neutron stars, through supramassive (SMNS) or hypermassive (HMNS) neutron stars supported only temporarily against gravity, to black holes formed…

High Energy Astrophysical Phenomena · Physics 2021-10-27 Paz Beniamini , Wenbin Lu

We describe a model of the short gamma-ray burst (SGRB) population under a `quasi-universal jet' scenario in which jets can differ in their on-axis peak prompt emission luminosity $L_c$, but share a universal angular luminosity profile…

High Energy Astrophysical Phenomena · Physics 2023-12-13 O. S. Salafia , M. E. Ravasio , G. Ghirlanda , I. Mandel

Long-duration gamma-ray bursts (GRBs) are understood to be the final fate for a subset of massive, stripped envelope, rapidly rotating stars. Beyond this, our knowledge of the progenitor systems is limited. Using the BPASS (Binary…

High Energy Astrophysical Phenomena · Physics 2019-11-20 A. A. Chrimes , E. R. Stanway , J. J. Eldridge

We show that the inferred merger rate and chirp masses of binary black holes (BBHs) detected by advanced LIGO (aLIGO) can be used to constrain the rate of double neutron star (DNS) and neutron star - black hole (NSBH) mergers in the…

Instrumentation and Methods for Astrophysics · Physics 2017-10-27 Anuradha Gupta , K. G. Arun , B. S. Sathyaprakash

In this work, we analyze the most recent short gamma-ray burst (sGRB) sample detected by the \emph{Fermi} satellite to reassess the sGRB luminosity function and formation rate. Using the empirical redshift-luminosity correlation, we first…

High Energy Astrophysical Phenomena · Physics 2025-09-03 Chong-Yu Gao , Jun-Jie Wei , Hou-Dun Zeng

GRB 111005A, one long duration gamma-ray burst (GRB) occurred within a metal-rich environment that lacks massive stars with $M_{\rm ZAMS}\geq 15M_\odot$, is not coincident with supernova emission down to stringent limit and thus should be…

High Energy Astrophysical Phenomena · Physics 2018-01-11 Yuan-Zhu Wang , Yong-Jia Huang , Yun-Feng Liang , Xiang Li , Zhi-Ping Jin , Fu-Wen Zhang , Yuan-Chuan Zou , Yi-Zhong Fan , Da-Ming Wei

Short gamma-ray bursts (GRBs) are the aftermath of compact binary mergers involving neutron stars. If the merger remnant is a millisecond magnetar instead of a black hole, a significant proportion of the rotational energy deposited to the…

High Energy Astrophysical Phenomena · Physics 2024-01-23 Ankur Ghosh , C. S. Vaishnava , L. Resmi , Kuntal Misra , K. G. Arun , Amitesh Omar , N. K. Chakradhari

The collapsar model was proposed to explain the long-duration gamma-ray bursts (GRBs), while the short GRBs are associated with the mergers of compact objects. In the first case, mainly the energetics of the events is consistent with the…

High Energy Astrophysical Phenomena · Physics 2018-05-10 Agnieszka Janiuk , Kostas Sapountzis