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The merger dynamics of a black hole-neutron star (BHNS) binary is influenced by the neutron star equation of state (EoS) through the latter's effect on the neutron star's radius and on the character of the mass transfer onto the black hole.…

高能天体物理现象 · 物理学 2014-11-20 Matthew D. Duez , Francois Foucart , Lawrence E. Kidder , Christian D. Ott , Saul A. Teukolsky

We perform a numerical-relativity simulation for the merger of binary neutron stars with 6 nuclear-theory-based equations of state (EOSs) described by piecewise polytropes. Our purpose is to explore the dependence of the dynamical behavior…

高能天体物理现象 · 物理学 2011-06-13 Kenta Hotokezaka , Koutarou Kyutoku , Hirotada Okawa , Masaru Shibata , Kenta Kiuchi

We report a new microscopic equation of state (EOS) of dense symmetric nuclear matter, pure neutron matter, and asymmetric and $\beta$-stable nuclear matter at zero temperature using recent realistic two-body and three-body nuclear…

高能天体物理现象 · 物理学 2018-05-31 Ignazio Bombaci , Domenico Logoteta

We present general relativistic numerical simulations of binary neutron star (BNS) mergers with different initial spin configurations. We focus on models with stars of mass 1.4 M_sol each, which employ the equation of state (EOS) by Shen,…

高能天体物理现象 · 物理学 2018-02-26 Wolfgang Kastaun , Riccardo Ciolfi , Andrea Endrizzi , Bruno Giacomazzo

We probe the intrinsic differences in simulated gravitational-wave signals from binary neutron star (BNS) mergers, arising from varying approaches to incorporating thermal effects in numerical-relativity modeling. We consider a hybrid…

广义相对论与量子宇宙学 · 物理学 2025-03-04 Miquel Miravet-Tenés , Davide Guerra , Milton Ruiz , Pablo Cerdá-Durán , José A. Font

We present numerical results of three-dimensional simulations for the merger of binary neutron stars (BNSs) in full general relativity. Hybrid equations of state (EOSs) are adopted to mimic realistic nuclear EOSs. In this approach, we…

广义相对论与量子宇宙学 · 物理学 2009-11-11 Masaru Shibata , Keisuke Taniguchi , Koji Uryu

Gravitational waves from binary neutron star (BNS) mergers can constrain nuclear matter models predicting the neutron star's equation of state (EOS). Matter effects on the inspiral-merger signal are encoded in the multipolar tidal…

广义相对论与量子宇宙学 · 物理学 2023-02-09 Matteo Breschi , Gregorio Carullo , Sebastiano Bernuzzi

An extended set of binary neutron star (NS) merger simulations is performed with an approximative conformally flat treatment of general relativity to systematically investigate the influence of the nuclear equation of state (EoS), the…

天体物理学 · 物理学 2009-11-11 R. Oechslin , H. -T. Janka , A. Marek

We present fully GRMHD simulations of the merger of binary neutron star (BNS) systems. We consider BNSs producing a hypermassive neutron star (HMNS) that collapses to a spinning black hole (BH) surrounded by a magnetized accretion disk in a…

高能天体物理现象 · 物理学 2016-10-31 Takumu Kawamura , Bruno Giacomazzo , Wolfgang Kastaun , Riccardo Ciolfi , Andrea Endrizzi , Luca Baiotti , Rosalba Perna

We present results from long-term, numerical-relativity simulations of binary neutron star mergers modeled using both, fully tabulated, finite-temperature, equations of state and their corresponding hybrid representations. The simulations…

广义相对论与量子宇宙学 · 物理学 2026-03-03 Davide Guerra , Milton Ruiz , Michele Pasquali , Pablo Cerdá-Durán , Arnau Rios , José A. Font

Binary neutron star mergers provide a unique probe of the dense-matter equation of state (EoS) across a wide range of parameter space, from the zero-temperature EoS during the inspiral to the high-temperature EoS following the merger. In…

高能天体物理现象 · 物理学 2021-09-22 Carolyn Raithel , Vasileios Paschalidis , Feryal Özel

Numerical simulations for the merger of binary neutron stars are performed in full general relativity incorporating both nucleonic and hyperonic finite-temperature equations of state (EOS) and neutrino cooling for the first time. It is…

高能天体物理现象 · 物理学 2015-05-30 Yuichiro Sekiguchi , Kenta Kiuchi , Koutarou Kyutoku , Masaru Shibata

General relativistic simulations for the merger of binary neutron stars are performed as an extension of a previous work\cite{Shibata:2006nm}. We prepare binary neutron stars with a large initial orbital separation and employ the…

广义相对论与量子宇宙学 · 物理学 2009-11-06 Kenta Kiuchi , Yuichiro Sekiguchi , Masaru Shibata , Keisuke Taniguchi

Multi-messenger observation of binary neutron-star mergers can provide valuable information on the nuclear equation of state (EoS). Here, we investigate to which extent electromagnetic observations of the associated kilonovae allow us to…

高能天体物理现象 · 物理学 2025-08-22 Kelsey A. Lund , Rahul Somasundaram , Gail C. McLaughlin , Jonah M. Miller , Matthew R. Mumpower , Ingo Tews

The dynamics in mergers of binary neutron star (BNS) systems depend sensitively on the equation of state (EOS) of dense matter. This has profound implications on the emission of gravitational waves (GWs) and the ejection of matter in the…

In this work, we discuss the dense matter equation of state (EOS) for the extreme range of conditions encountered in neutron stars and their mergers. The calculation of the properties of such an EOS involves modeling different degrees of…

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…

高能天体物理现象 · 物理学 2017-08-02 Anthony L. Piro , Bruno Giacomazzo , Rosalba Perna

The Equation of State (EOS) of dense strongly-interacting matter can be probed by astrophysical observations of neutron stars (NS), such as X-ray detections of pulsars or the measurement of the tidal deformability of NSs during the inspiral…

高能天体物理现象 · 物理学 2023-11-09 Maximiliano Ujevic , Rahul Somasundaram , Tim Dietrich , Jerome Margueron , Ingo Tews

Fully general-relativistic binary-neutron-star (BNS) merger simulations with quark-hadron crossover (QHC) equations of state (EOSs) are studied for the first time. In contrast to EOSs with purely hadronic matter or with a first-order…

(abridged) We investigate the quark deconfinement phase transition in the context of binary neutron star (BNS) mergers. We employ a new finite-temperature composition-dependent equation of state (EOS) with a first order phase transition…

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