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Related papers: Thermal behavior as indicator for hyperons in bina…

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We study the influence of hyperons in binary neutron star (NS) mergers considering a total of 14 temperature dependent equations of state (EoSs) models which include hyperonic degrees of freedom and partly delta resonances. Thermally…

High Energy Astrophysical Phenomena · Physics 2025-06-03 Hristijan Kochankovski , Georgios Lioutas , Sebastian Blacker , Andreas Bauswein , Angels Ramos , Laura Tolos

We analyze the influence of hyperons in binary neutron star mergers considering several different equations of state that include hyperons. By running a large set of simulations, we study the impact of the thermally produced hyperons on the…

High Energy Astrophysical Phenomena · Physics 2025-07-25 Laura Tolos , Hristijan Kochankovski , Angels Ramos , Georgios Lioutas , Sebastian Blacker , Andreas Bauswein

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…

General Relativity and Quantum Cosmology · Physics 2026-03-03 Davide Guerra , Milton Ruiz , Michele Pasquali , Pablo Cerdá-Durán , Arnau Rios , José A. Font

Finite-temperature equation of state (EoS) and the composition of dense nuclear and hypernuclear matter under conditions characteristic of neutron star binary merger remnants and supernovas are discussed. We consider both neutrino…

Nuclear Theory · Physics 2021-10-18 Armen Sedrakian , Arus Harutyunyan

We review the equation of state (EoS) models covering a large range of temperatures, baryon number densities and electron fractions presently available on the \textsc{CompOSE} database. These models are intended to be directly usable within…

Nuclear Theory · Physics 2021-12-17 Adriana R. Raduta , Flavia Nacu , Micaela Oertel

We discuss the effects induced by the potential presence of hyperons in hot and ultra-dense matter within the context of neutron star mergers. Specifically, we address their effect on the dominant post-merger frequency of the gravitational…

High Energy Physics - Phenomenology · Physics 2024-11-25 Hristijan Kochankovski , Angels Ramos , Laura Tolos , Sebastian Blacker , Andreas Bauswein

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…

High Energy Astrophysical Phenomena · Physics 2015-05-30 Yuichiro Sekiguchi , Kenta Kiuchi , Koutarou Kyutoku , Masaru Shibata

Binary neutron star mergers probe the dense-matter equation of state (EoS) across a wide range of densities and temperatures, from the cold conditions of the inspiral to the high-temperature matter of the massive neutron star remnant. In…

High Energy Astrophysical Phenomena · Physics 2023-06-26 Carolyn A. Raithel , Vasileios Paschalidis

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…

High Energy Astrophysical Phenomena · Physics 2021-09-22 Carolyn Raithel , Vasileios Paschalidis , Feryal Özel

The equation of state (EoS) and composition of dense and hot $\Delta$-resonance admixed hypernuclear matter is studied under conditions that are characteristic of neutron star binary merger remnants and supernovas. The cold, neutrino free…

Nuclear Theory · Physics 2022-08-01 Armen Sedrakian , Arus Harutyunyan

In this work we delve into the temperature-dependent Equation of State (EoS) of baryonic matter within the framework of the FSU2H$^*$ hadronic model, which comprehensively incorporates hyperons and is suitable for relativistic simulations…

High Energy Astrophysical Phenomena · Physics 2024-02-01 Hristijan Kochankovski , Angels Ramos , Laura Tolos

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…

General Relativity and Quantum Cosmology · Physics 2025-03-04 Miquel Miravet-Tenés , Davide Guerra , Milton Ruiz , Pablo Cerdá-Durán , José A. Font

We study the importance of the thermal behavior of the hadron-quark phase transition in neutron star (NS) mergers. To this end, we devise a new scheme approximating thermal effects to supplement any cold, barotropic hybrid equation of state…

High Energy Astrophysical Phenomena · Physics 2023-10-02 Sebastian Blacker , Andreas Bauswein , Stefan Typel

Binary neutron star mergers provide a unique laboratory for studying matter under conditions that cannot be reproduced in terrestrial experiments. They probe dense matter at supranuclear density, finite temperature, rapid rotation, strong…

High Energy Astrophysical Phenomena · Physics 2026-05-27 Armen Sedrakian

Neutron stars offer the opportunity to study the behaviour of matter at densities and temperatures inaccessible to terrestrial experiments. Gravitational-wave observations of binary neutron star coalescences can constrain the neutron-star…

High Energy Astrophysical Phenomena · Physics 2021-01-14 Francisco Hernandez-Vivanco , Paul D. Lasky , Eric Thrane , Rory Smith , Debarati Chatterjee , Sarmistha Banik , Theo Motta , Anthony Thomas

The fate of the remnant following the merger of two neutron stars initially on quasicircular orbits depends primarily on the mass of the initial neutron stars, the mass ratio, and the still-uncertain dense-matter equation of state (EoS).…

High Energy Astrophysical Phenomena · Physics 2026-02-17 Carolyn A. Raithel , Vasileios Paschalidis

Parametric equations of state (EoSs) provide an important tool for systematically studying EoS effects in neutron star merger simulations. In this work, we perform a numerical validation of the M*-framework for parametrically calculating…

High Energy Astrophysical Phenomena · Physics 2022-09-14 Carolyn A. Raithel , Pedro Espino , Vasileios Paschalidis

In this work, we study the effect of differential rotation, finite temperature and strangeness on the quasi stationary sequences of hyper massive neutron stars (HMNS). We generate constant rest mass sequences of differentially rotating and…

High Energy Astrophysical Phenomena · Physics 2022-09-14 Sanika Khadkikar , Chatrik Singh Mangat , Sarmistha Banik

In this work we present a newly constructed equation of state (EoS) --applicable to stellar core collapse and neutron star mergers--, including the entire baryon octet. Our EoS is compatible with the main constraints from nuclear physics…

Nuclear Theory · Physics 2017-10-18 Miguel Marques , Micaela Oertel , Matthias Hempel , Jérôme Novak

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. It is found that for the…

High Energy Astrophysical Phenomena · Physics 2015-06-05 Kenta Kiuchi , Yuichiro Sekiguchi , Koutarou Kyutoku , Masaru Shibata
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