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We present a wide-field optical imaging search for electromagnetic counterparts to the likely neutron star - black hole (NS-BH) merger GW190814/S190814bv. This compact binary merger was detected through gravitational waves by the LIGO/Virgo…

The 2017 detection of a kilonova coincident with gravitational-wave emission has identified neutron star mergers as the major source of the heaviest elements, and dramatically constrained alternative theories of gravity. Observing a…

高能天体物理现象 · 物理学 2023-03-07 Christian N. Setzer , Hiranya V. Peiris , Oleg Korobkin , Stephan Rosswog

After the successful detection of a gravitational-wave (GW) signal and its associated electromagnetic (EM) counterparts from GW170817, neutron star--black hole (NSBH) mergers have been highly expected to be the next type of multi-messenger…

高能天体物理现象 · 物理学 2022-04-20 Rui-Chong Hu , Jin-Ping Zhu , Ying Qin , Bing Zhang , En-Wei Liang , Yong Shao

In May 2023, the LIGO Livingston observatory detected the likely black hole-neutron star (BHNS) merger GW230529_181500. That event is expected to be the merger of a 2.5-4.5 $M_{\odot}$ primary with a secondary compact object of mass between…

高能天体物理现象 · 物理学 2025-04-18 Tia Martineau , Francois Foucart , Mark Scheel , Matthew Duez , Lawrence Kidder , Harald Pfeiffer

We present simulated observations to assess the ability of LSST and the WFD survey to detect and characterize kilonovae - the optical emission associated with binary neutron star (and possibly black hole - neutron star) mergers. We expand…

高能天体物理现象 · 物理学 2019-04-03 P. S. Cowperthwaite , V. A. Villar , D. M. Scolnic , E. Berger

Over the last few years, there has been an increasing interest in sub-solar mass black holes due to their potential to provide valuable information about cosmology or the black hole population. Motivated by this, we study observable…

广义相对论与量子宇宙学 · 物理学 2025-06-10 Ivan Markin , Anna Neuweiler , Adrian Abac , Swami Vivekanandji Chaurasia , Maximiliano Ujevic , Mattia Bulla , Tim Dietrich

In the first work of this series, we adopt a GW170817-like, viewing-angle-dependent kilonova model and the standard afterglow model with the lightcurve distribution based on the properties of cosmological short gamma-ray bursts afterglows…

高能天体物理现象 · 物理学 2022-08-30 Jin-Ping Zhu , Yuan-Pei Yang , Bing Zhang , He Gao , Yun-Wei Yu

Fast material ejected dynamically over $<10$ ms during the merger of a binary neutron-star (BNS) system can give rise to distinctive electromagnetic counterparts to the system's gravitational-wave emission that can serve as a "smoking gun"…

高能天体物理现象 · 物理学 2023-03-23 Luciano Combi , Daniel M. Siegel

As LIGO-Virgo-KAGRA enters its fourth observing run, a new opportunity to search for electromagnetic counterparts of compact object mergers will also begin. The light curves and spectra from the first "kilonova" associated with a binary…

高能天体物理现象 · 物理学 2023-07-05 Erika M. Holmbeck , Jennifer Barnes , Kelsey A. Lund , Trevor M. Sprouse , G. C. McLaughlin , Matthew R. Mumpower

Mergers of binary neutron stars (NSs) usually result in the formation of a hypermassive neutron star (HMNS). Whether- and when this remnant collapses to a black hole (BH) depends primarily on the equation of state and on angular momentum…

高能天体物理现象 · 物理学 2015-06-18 Brian D. Metzger , Rodrigo Fernández

We study long-term evolution of the matter ejected in a black-hole neutron-star (BH-NS) merger employing the results of a long-term numerical-relativity simulation and nucleosynthesis calculation, in which both dynamical and post-merger…

We investigate the nucleosynthesis and kilonova properties of binary neutron-star (NS) merger models which lead to intermediate remnant lifetimes of ~0.1-1seconds until black-hole (BH) formation and describe all components of material…

With the epochal first detection of gravitational waves from a binary neutron star (NS) merger with the GW170817 event, and its direct confirmation that NS-NS mergers are significant sources of the of the r-process nucleosynthesis of heavy…

The Einstein Telescope (ET), a proposed next-generation gravitational wave (GW) observatory, will expand the reach of GW astronomy of stellar-mass compact object binaries to unprecedented distances, enhancing opportunities for…

The merger of two neutron stars (NSs) or a neutron star and a black hole (BH) produces a radioactively-powered transient known as a kilonova, first observed accompanying the gravitational wave event GW170817. While kilonovae are frequently…

高能天体物理现象 · 物理学 2021-03-17 Siva Darbha , Daniel Kasen

Binary neutron star mergers and neutron star-black hole mergers are multi-messenger sources that can be detected in gravitational waves and in electromagnetic radiation. The low electron fraction of neutron star merger ejecta favors the…

Compact binary mergers are sources of gravitational waves, and can be accompanied by electromagnetic signals. We discuss the possible features in the kilonova emissions which may help distinguish the black hole - neutron star mergers from…

高能天体物理现象 · 物理学 2024-03-25 Agnieszka Janiuk , Joseph Saji , Gerardo Urrutia

Observations of X-ray binaries indicate a dearth of compact objects in the mass range from $\sim 2-5 M_{\odot}$. The existence of this (first mass) gap has been used to discriminate between proposed engines behind core-collapse supernovae.…

高能天体物理现象 · 物理学 2023-01-02 P. Drozda , K. Belczynski , R. O'Shaughnessy , T. Bulik , C. L. Fryer

Gamma-Ray Burst (GRB) prompt and afterglow emission, as well as a kilonova (KN), are the expected electromagnetic (EM) counterparts of Binary Neutron Star (BNS) and Neutron Star -- Black Hole (NSBH) mergers. We aim to infer the KN ejecta…

高能天体物理现象 · 物理学 2025-12-30 P. Singh , G. Stratta , A. Rossi , P. T. H. Pang , M. Bulla , F. Ragosta , A. De Rosa , D. A. Kann , F. Cogato