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The detailed observations of GW170817 proved for the first time directly that neutron star mergers are a major production site of heavy elements. The observations could be fit by a number of simulations that qualitatively agree, but can…

A multi-messenger, black hole (BH) - neutron star (NS) merger event still remains to be detected. The tidal (dynamical) ejecta from such an event, thought to produce a kinonova, is concentrated in the equatorial plane and occupies only part…

高能天体物理现象 · 物理学 2023-09-08 Yan Li , Rong-Feng Shen

In this paper, we present a numerical method to study the predicted lightcurves as a function of viewing angle. We extrapolate the fitting formulae for the mass and velocity of tidal dynamical ejecta across a wide range of mass ratio…

高能天体物理现象 · 物理学 2020-07-01 Jin-Ping Zhu , Yuan-Pei Yang , Liang-Duan Liu , Yan Huang , Bing Zhang , Zhuo Li , Yun-Wei Yu , He Gao

The coalescence of double neutron star (NS-NS) and black hole (BH)-NS binaries are prime sources of gravitational waves (GW) for Advanced LIGO/Virgo and future ground-based detectors. Neutron-rich matter released from such events undergo…

高能天体物理现象 · 物理学 2020-01-08 Brian D. Metzger

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…

高能天体物理现象 · 物理学 2017-07-19 Brian D. Metzger

We perform radiative transfer simulations for kilonova in various situations, including the cases of prompt collapse to a black hole from neutron-star mergers, high-velocity ejecta possibly accelerated by magnetars, and a black hole-neutron…

高能天体物理现象 · 物理学 2020-02-12 Kyohei Kawaguchi , Masaru Shibata , Masaomi Tanaka

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…

高能天体物理现象 · 物理学 2018-10-31 Zhi-Qiu Huang , Liang-Duan Liu , Xiang-Yu Wang , Zi-Gao Dai

Kilonovae are generally believed to originate from the ejecta of binary neutron stars (NSs) or black hole and NS mergers. Free neutrons might be retained in the outermost layer of the ejecta to produce a precursor via $\beta$-decay. During…

高能天体物理现象 · 物理学 2023-03-08 Yan-Qing Qi , Tong Liu

The mergers of neutron stars expel a heavy-element enriched fireball which can be observed as a kilonova. The kilonova's geometry is a key diagnostic of the merger and is dictated by the properties of ultra-dense matter and the energetics…

高能天体物理现象 · 物理学 2023-02-15 Albert Sneppen , Darach Watson , Andreas Bauswein , Oliver Just , Rubina Kotak , Ehud Nakar , Dovi Poznanski , Stuart Sim

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…

高能天体物理现象 · 物理学 2021-01-20 Hannah Klion , Paul C. Duffell , Daniel Kasen , Eliot Quataert

The detection of GW170817 and the accompanying electromagnetic counterpart, AT2017gfo, have provided an important set of observational constraints for theoretical models of neutron star mergers, nucleosynthesis, and radiative transfer for…

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

Detecting the thermal emission from double neutron star merger events is a challenging task because of the quick fading of the observed flux. In order to create an efficient observing strategy for their observing method it is crucial to…

高能天体物理现象 · 物理学 2020-10-19 József Kóbori , Zsolt Bagoly , Lajos G. Balázs

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…

Kilonova is an optical-infrared transient powered by the radioactive decay of heavy nuclei from binary neutron star mergers. Its observational characteristics depend on the mass and the nuclide composition of meger ejecta, which are…

高能天体物理现象 · 物理学 2025-02-03 Wu-Zimo Qiumu , Meng-Hua Chen , Qiu-Hong Chen , En-Wei Liang

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…

高能天体物理现象 · 物理学 2026-03-17 Ish Gupta , Yugesh Bhoge , Rahul Kashyap , Mukul Bhattacharya

One of the most promising electromagnetic signatures of compact object mergers are kilonovae: approximately isotropic radioactively-powered transients that peak days to weeks post-merger. Key uncertainties in modeling kilonovae include the…

高能天体物理现象 · 物理学 2016-10-05 Jennifer Barnes , Daniel Kasen , Meng-Ru Wu , Gabriel Mart'inez-Pinedo

We present a semi-analytic model for predicting kilonova light curves from the mergers of neutron stars with black holes (NSBH). The model is integrated into the MOSFiT platform, and can generate light curves from input binary properties…

高能天体物理现象 · 物理学 2023-10-02 B. P. Gompertz , M. Nicholl , J. C. Smith , S. Harisankar , G. Pratten , P. Schmidt , G. P. Smith

Kilonovae produced by mergers of binary neutron stars (BNSs) are important transient events to be detected by time domain surveys with the alerts from the ground-based gravitational wave detectors. The observational properties of these…

高能天体物理现象 · 物理学 2023-04-19 Chunyang Zhao , Youjun Lu , Qingbo Chu , Wen Zhao

The majority of existing results for the kilonova (or macronova) emission from material ejected during a neutron-star (NS) merger is based on (quasi-)one-zone models or manually constructed toy-model ejecta configurations. In this study we…

高能天体物理现象 · 物理学 2022-05-06 Oliver Just , Ina Kullmann , Stephane Goriely , Andreas Bauswein , Hans-Thomas Janka , Christine E. Collins
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