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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

In the new era of gravitational wave (GW) and multi-messenger astrophysics, the detection of a GW signal from the coalescence of a black hole - neutron star (BHNS) binary remains a highly anticipated discovery. This kind of system is…

High Energy Astrophysical Phenomena · Physics 2019-06-05 C. Barbieri , O. S. Salafia , A. Perego , M. Colpi , G. Ghirlanda

We study kilonova emission from binary neutron star (BNS) mergers for the case that a remnant massive neutron star (MNS) forms and collapses to a black hole within $20$ ms after the onset of the merger (which we refer to as "a short-lived…

High Energy Astrophysical Phenomena · Physics 2023-06-13 Kyohei Kawaguchi , Sho Fujibayashi , Nanae Domoto , Kenta Kiuchi , Masaru Shibata , Shinya Wanajo

Observations by the current generation of gravitational-wave detectors have been pivotal in expanding our understanding of the universe. Although tens of exciting compact binary mergers have been observed, neutron star-black hole (NSBH)…

General Relativity and Quantum Cosmology · Physics 2023-07-26 Ish Gupta , Ssohrab Borhanian , Arnab Dhani , Debatri Chattopadhyay , Rahul Kashyap , V. Ashley Villar , B. S. Sathyaprakash

Kilonovae from compact binary mergers are most informative when accompanied by a gravitational-wave signal, which can help identify the source as a binary neutron star (BNS) or a neutron star-black hole (NSBH) merger. However, future events…

High Energy Astrophysical Phenomena · Physics 2026-03-17 Ish Gupta , Yugesh Bhoge , Rahul Kashyap , Mukul Bhattacharya

We present detailed simulations of black hole-neutron star (BH-NS) mergers kilonova and gamma-ray burst (GRB) afterglow and kilonova luminosity function, and discuss the detectability of electromagnetic (EM) counterpart in connection with…

High Energy Astrophysical Phenomena · Physics 2021-08-12 Jin-Ping Zhu , Shichao Wu , Yuan-Pei Yang , Bing Zhang , He Gao , Yun-Wei Yu , Zhuo Li , Zhoujian Cao , Liang-Duan Liu , Yan Huang , Xing-Han Zhang

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 merging of a binary system involving two neutron stars (NSs), or a black hole (BH) and a NS, often results in the emission of an electromagnetic (EM) transient. One component of this EM transient is the epic explosion known as a…

High Energy Astrophysical Phenomena · Physics 2023-12-20 Lowri Wyn Prys Mathias , Francesco Di Clemente , Mattia Bulla , Alessandro Drago

Black hole-neutron star mergers are among the promising gravitational-wave sources for ground-based detectors, and gravitational waves from black hole-neutron star mergers are expected to be detected in the next few years. Simultaneous…

High Energy Astrophysical Phenomena · Physics 2016-09-05 Kyohei Kawaguchi , Koutarou Kyutoku , Masaru Shibata , Masaomi Tanaka

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

Neutron star-black hole (NSBH) mergers, detectable via their gravitational-wave (GW) emission, are expected to produce kilonovae (KNe). Four NSBH candidates have been identified and followed-up by more than fifty instruments since the start…

The gravitational wave event GW170817 associated with the short gamma-ray burst (GRB) 170817A confirms that binary neutron star (BNS) mergers are one of the origins of short GRBs. The associated kilonova emission, radioactively powered by…

High Energy Astrophysical Phenomena · Physics 2018-10-31 Zhi-Qiu Huang , Liang-Duan Liu , Xiang-Yu Wang , Zi-Gao 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…

The mergers of double neutron star (NS-NS) and black hole (BH)-NS binaries are promising gravitational wave (GW) sources for Advanced LIGO and future GW detectors. The neutron-rich ejecta from such merger events undergoes rapid neutron…

High Energy Astrophysical Phenomena · Physics 2017-07-19 Brian D. Metzger

Neutron star-black hole (NSBH) mergers detected in gravitational waves have the potential to shed light on supernova physics, the dense matter equation of state, and the astrophysical processes that power their potential electromagnetic…

High Energy Astrophysical Phenomena · Physics 2023-06-22 Sylvia Biscoveanu , Philippe Landry , Salvatore Vitale

The existence of merging black hole-neutron star (BHNS) binaries has been ascertained through the observation of their gravitational wave (GW) signals. However, to date, no definitive electromagnetic (EM) emission has been confidently…

We analyse the tidal disruption probability of potential neutron star--black hole (NSBH) merger gravitational wave (GW) events, including GW190426_152155, GW190814, GW200105_162426 and GW200115_042309, detected during the third observing…

High Energy Astrophysical Phenomena · Physics 2021-11-12 Jin-Ping Zhu , Shichao Wu , Yuan-Pei Yang , Bing Zhang , Yun-Wei Yu , He Gao , Zhoujian Cao , Liang-Duan Liu

The promise by the LIGO/Virgo/Kagra (LVK) collaboration to detect black hole--neutron star (BH--NS) mergers via gravitational wave (GW) emission has recently been fulfilled with the detection of GW200105 and GW200115. Mergers of BH--NS…

High Energy Astrophysical Phenomena · Physics 2021-12-15 Giacomo Fragione

The ongoing LIGO-Virgo-KAGRA observing run O4 provides an opportunity to discover new multi-messenger events, including binary neutron star (BNS) mergers such as GW170817, and the highly anticipated first detection of a multi-messenger…

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