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We study the dependence of the electromagnetic luminosity --produced by interactions of force-free magnetospheres-- on dipole inclinations in binary neutron star systems. We show that this interaction extracts kinetic energy from the system…

General Relativity and Quantum Cosmology · Physics 2014-08-06 Marcelo Ponce , Carlos Palenzuela , Luis Lehner , Steven L. Liebling

The coalescence of two neutron stars is accompanied by the emission of gravitational waves, and can also feature electromagnetic counterparts powered by mass ejecta and the formation of a relativistic jet after the merger. Since neutron…

High Energy Astrophysical Phenomena · Physics 2022-07-20 Elias R. Most , Alexander A. Philippov

We investigate the effects of the magnetic dipole-dipole coupling and the electromagnetic radiation on the frequency evolution of gravitational waves from inspiralling binary neutron stars with magnetic dipole moments. This study is…

Astrophysics · Physics 2009-10-31 Kunihito Ioka , Keisuke Taniguchi

We study the gravitational-wave peak luminosity and radiated energy of quasicircular neutron star mergers using a large sample of numerical relativity simulations with different binary parameters and input physics. The peak luminosity for…

General Relativity and Quantum Cosmology · Physics 2018-03-21 Francesco Zappa , Sebastiano Bernuzzi , David Radice , Albino Perego , Tim Dietrich

We calculate the gravitational radiation produced by the merger and coalescence of inspiraling binary neutron stars using 3-dimensional numerical simulations. The stars are modeled as polytropes and start out in the point-mass limit at wide…

General Relativity and Quantum Cosmology · Physics 2011-09-09 Xing Zhuge , Joan M. Centrella , Stephen L. W. McMillan

Binary neutron-star (BNS) mergers are accompanied by multi-messenger emissions, including gravitational wave (GW), neutrino, and electromagnetic signals. Some fraction of BNS mergers may result in a rapidly spinning magnetar as a remnant,…

High Energy Astrophysical Phenomena · Physics 2025-08-22 Mainak Mukhopadhyay , Shigeo S. Kimura , Brian D. Metzger

As technology has improved, binary neutron star systems have been observed more frequently, in fact, the first gravitational wave to have an electromagnetic counterpart originated from the merger of two neutron stars (GW170817). Detecting…

Instrumentation and Methods for Astrophysics · Physics 2022-11-18 Jeshwanth Mohan

Massive (hypermassive and supramassive) neutron stars are likely to be often formed after the merger of binary neutron stars. We explore the evolution process of the remnant massive neutron stars and gravitational waves emitted by them,…

High Energy Astrophysical Phenomena · Physics 2015-06-16 Kenta Hotokezaka , Kenta Kiuchi , Koutarou Kyutoku , Takayuki Muranushi , Yu-ichiro Sekiguchi , Masaru Shibata , Keisuke Taniguchi

Neutron stars in astrophysical binary systems represent exciting sources for multi-messenger astrophysics. A potential source of electromagnetic transients from compact binary systems is the neutron star ocean, the external fluid layer…

High Energy Astrophysical Phenomena · Physics 2023-02-03 Andrew G. Sullivan , Lucas M. B. Alves , Georgina O. Spence , Isabella P. Leite , Doğa Veske , Imre Bartos , Zsuzsa Márka , Szabolcs Márka

The gravitational-wave events GW170817 and GW190425 have led to a number of important insights on the equation of state of dense matter and the properties of neutron stars, such as their radii and the maximum mass. Some of these conclusions…

High Energy Astrophysical Phenomena · Physics 2022-04-20 L. Jens Papenfort , Elias R. Most , Samuel Tootle , Luciano Rezzolla

The simultaneous detection of electromagnetic and gravitational wave emission from merging neutron star binaries would aid greatly in their discovery and interpretation. By studying turbulent amplification of magnetic fields in local…

High Energy Astrophysical Phenomena · Physics 2015-06-15 Jonathan Zrake , Andrew I. MacFadyen

It is an open question whether and how gravitational wave events involving neutron stars can be preceded by electromagnetic counterparts. This work shows that the collision of two neutron stars with magnetic fields well below magnetar-level…

High Energy Astrophysical Phenomena · Physics 2023-06-21 Elias R. Most , Alexander A. Philippov

Highly eccentric binary neutron star mergers exhibit unique dynamical and observational signatures compared to quasi-circular ones in terms of their gravitational wave signal and the ejection of matter, leading to different electromagnetic…

General Relativity and Quantum Cosmology · Physics 2025-04-15 Anna Neuweiler , Tim Dietrich , Bernd Brügmann

Extending previous work by a number of authors, we have recently presented a new approach in which the detection of gravitational waves from merging neutron star binaries can be used to determine the equation of state of matter at nuclear…

General Relativity and Quantum Cosmology · Physics 2015-03-09 Kentaro Takami , Luciano Rezzolla , Luca Baiotti

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 consider electromagnetic interaction and precursor emission of merging neutron stars. Orbital motion of the magnetized neutron stars may revive pair production within the common magnetosphere years before the merger, igniting pulsar-like…

High Energy Astrophysical Phenomena · Physics 2019-12-06 Maxim Lyutikov

Recent detections by the gravitational wave facilities LIGO/Virgo have opened a window to study the internal structure of neutron stars through the gravitational waves emitted during their coalescence. In this work we explore, through…

General Relativity and Quantum Cosmology · Physics 2019-09-26 Miguel Bezares , Daniele Viganò , Carlos Palenzuela

Spin can have significant effects on the electromagnetic transients accompanying binary neutron star mergers. The measurement of spin can provide important information about binary formation channels. In the absence of a strong neutron star…

High Energy Astrophysical Phenomena · Physics 2019-12-18 William E. East , Vasileios Paschalidis , Frans Pretorius , Antonios Tsokaros

We analytically study the properties of the electromagnetic field in vacuum around close binary compact stars containing at least one neutron star. We show that the orbital motion of the neutron star induces high multipole modes of the…

High Energy Astrophysical Phenomena · Physics 2022-09-16 Tomoki Wada , Masaru Shibata , Kunihito Ioka

Neutron star mergers, referring to both binary neutron star and neutron star black hole mergers, are the canonical multimessenger events. They have been detected across the electromagnetic spectrum, have recently been detected in…