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The postmerger gravitational-wave (GW) signal of a binary neutron star (BNS) merger is expected to contain valuable information that could shed light on the equation of state (EOS) of NSs, the properties of the matter produced during the…

High Energy Astrophysical Phenomena · Physics 2022-05-04 Aditya Vijaykumar , Shasvath J. Kapadia , Parameswaran Ajith

We analyze the gravitational wave (GW) emission from our recently published set of relativistic neutron star (NS) merger simulations and determine characteristic signal features that allow one to link GW measurements to the properties of…

Astrophysics · Physics 2008-11-26 R. Oechslin , H. -T. Janka

Newly born massive magnetars are generally considered to be produced by binary neutron star (NS) mergers, which could give rise to short gamma-ray bursts (SGRBs). The strong magnetic fields and fast rotation of these magnetars make them…

High Energy Astrophysical Phenomena · Physics 2017-04-26 Quan Cheng , Shuang-Nan Zhang , Xiao-Ping Zheng

The nature of the remnant of a binary neutron star (BNS) merger is uncertain. Though certainly a black hole (BH) in the cases of the most massive BNSs, X-ray lightcurves from gamma-ray burst (GRB) afterglows suggest a neutron star (NS) as a…

High Energy Astrophysical Phenomena · Physics 2026-01-09 Clara Plasse , Alexis Reboul-Salze , Jérome Guilet , Diego Götz , Nicolas Leroy , Raphaël. Raynaud , Matteo Bugli , Tito Dal Canton

The detection of electromagnetic radiation (EM) accompanying the gravitational wave (GW) signal from the binary neutron star (BNS) merger GW170817 has revealed that these systems constitute at least a fraction of the progenitors of short…

High Energy Astrophysical Phenomena · Physics 2022-03-30 Rosalba Perna , M. Celeste Artale , Yi-Han Wang , Michela Mapelli , Davide Lazzati , Cecilia Sgalletta , Filippo Santoliquido

The detection of a secular post-merger gravitational wave (GW) signal in a binary neutron star (BNS) merger serves as strong evidence for the formation of a long-lived post-merger neutron star (NS), which can help constrain the maximum mass…

General Relativity and Quantum Cosmology · Physics 2023-11-17 Yikang Chen , Bin Liu , Shunke Ai , Lin Lan , He Gao , Yong Yuan , Zong-Hong Zhu

Following merger, a neutron star (NS) binary can produce roughly one of three different outcomes: (1) a stable NS, (2) a black hole (BH), or (3) a supra-massive, rotationally-supported NS, which then collapses to a BH following angular…

High Energy Astrophysical Phenomena · Physics 2017-08-02 Anthony L. Piro , Bruno Giacomazzo , Rosalba Perna

Binary neutron star mergers are strong gravitational wave (GW) sources and the leading candidates to interpret short duration gamma-ray bursts (SGRBs). Under the assumptions that SGRBs are produced by double neutron star mergers and that…

High Energy Astrophysical Phenomena · Physics 2016-08-06 He Gao , Bing Zhang , Hou-Jun Lü

We investigate emission signatures of binary compact star gravitational wave sources consisting of strongly magnetized neutron stars (NSs) and/or white dwarfs (WDs) in their late-time inspiral phase. Because of electromagnetic interactions…

High Energy Astrophysical Phenomena · Physics 2018-11-21 Jie-Shuang Wang , Fang-Kun Peng , Kinwah Wu , Zi-Gao Dai

The oscillation modes of neutron star (NS) merger remnants, as encoded by the kHz postmerger gravitational wave (GW) signal, hold great potential for constraining the as-yet undetermined equation of state (EOS) of dense nuclear matter.…

General Relativity and Quantum Cosmology · Physics 2025-02-28 Jamie Bamber , Antonios Tsokaros , Milton Ruiz , Stuart L. Shapiro

A binary neutron star (BNS) merger event has recently been observed in gravitational waves (GWs). As in the case of binary black holes, GWs generated by BNS consist of inspiral, merger, and post-merger components. Detecting the latter is…

General Relativity and Quantum Cosmology · Physics 2018-02-07 Huan Yang , Vasileios Paschalidis , Kent Yagi , Luis Lehner , Frans Pretorius , Nicolas Yunes

Inspiraling and merging binary neutron stars (BNSs) are important sources of both gravitational waves and coincident electromagnetic counterparts. If the BNS total mass is larger than a threshold value, a black hole ensues promptly after…

High Energy Astrophysical Phenomena · Physics 2019-08-06 Vasileios Paschalidis , Milton Ruiz

Mergers of compact binaries, such as binary neutron stars (BNSs), neutron star-black hole binaries (NSBHs), and binary black holes (BBHs), are expected to be the best candidates for the sources of gravitational waves (GWs) and the leading…

High Energy Astrophysical Phenomena · Physics 2018-02-07 Wei-Wei Tan , Xi-Long Fan , F. Y. Wang

The joint observation of GW170817 and GRB170817A proved that binary neutron star (BNS) mergers are progenitors of short Gamma-ray Bursts (SGRB): this established a direct link between the still unsettled SGRB central engine and the outcome…

High Energy Astrophysical Phenomena · Physics 2020-09-30 Barbara Patricelli , Maria Grazia Bernardini

As the technology of gravitational-wave and neutrino detectors becomes increasingly mature, a multi-messenger era of astronomy is ushered in. Advanced gravitational wave detectors are close to making a ground-breaking discovery of…

High Energy Astrophysical Phenomena · Physics 2015-06-16 He Gao , Bing Zhang , Xue-Feng Wu , Zi-Gao Dai

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

Inspiraling and merging binary neutron stars are not only important source of gravitational waves, but also promising candidates for coincident electromagnetic counterparts. These systems are thought to be progenitors of short gamma-ray…

High Energy Astrophysical Phenomena · Physics 2017-11-03 Milton Ruiz , Stuart L. Shapiro

We demonstrate by a large set of merger simulations for symmetric binary neutron stars (NSs) that there is a tight correlation between the frequency peak of the postmerger gravitational-wave (GW) emission and the physical properties of the…

Solar and Stellar Astrophysics · Physics 2015-05-28 A. Bauswein , H. -Th. Janka

Black hole-neutron star (BHNS) binaries are expected to be among the leading sources of gravitational waves observable by ground-based detectors, and may be the progenitors of short-hard gamma ray bursts (SGRBs) as well. Here, we discuss…

As current gravitational wave (GW) detectors increase in sensitivity, and particularly as new instruments are being planned, there is the possibility that ground-based GW detectors will observe GWs from highly eccentric neutron star…

General Relativity and Quantum Cosmology · Physics 2018-11-14 Swami Vivekanandji Chaurasia , Tim Dietrich , Nathan K. Johnson-McDaniel , Maximiliano Ujevic , Wolfgang Tichy , Bernd Brügmann
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