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We provide the first comprehensive study of hyperons in neutron star mergers and quantify their specific impact. We discuss the thermal behavior of hyperonic equations of state~(EoSs) as a distinguishing feature from purely nucleonic models…

High Energy Astrophysical Phenomena · Physics 2024-02-09 Sebastian Blacker , Hristijan Kochankovski , Andreas Bauswein , Angels Ramos , Laura Tolos

The study of the nuclear equation-of-state (EoS) is a one of the primary goals of experimental and theoretical heavy-ion physics. The comparison of recent high statistics data from the STAR Collaboration with transport models provides a…

We derive a new equation of state (EoS) for neutron stars (NS) from the outer crust to the core based on modern microscopic Brueckner-Hartree-Fock (BHF) calculations using the Argonne $v_{18}$ potential plus three-body forces computed with…

Nuclear Theory · Physics 2015-12-02 B. K. Sharma , M. Centelles , X. Vinas , M. Baldo , G. F. Burgio

We examine relations among the parameters characterizing the phenomenological equation of state (EOS) of nearly symmetric, uniform nuclear matter near the saturation density by comparing macroscopic calculations of radii and masses of…

Nuclear Theory · Physics 2009-11-07 Kazuhiro Oyamatsu , Kei Iida

Through continuous progress in nuclear theory and experiment and an increasing number of neutron-star observations, a multitude of information about the equation of state (EOS) for matter at extreme densities is available. To constrain the…

A central open problem in nuclear physics is the determination of a physically robust equation of state (EoS) for dense nuclear matter, which directly informs our understanding of the internal composition and macroscopic properties of…

Nuclear Theory · Physics 2025-12-08 I. Stergakis , Th. Diakonidis , Ch. C. Moustakidis

We perform radiation-hydrodynamics simulations of binary neutron star mergers in numerical relativity on the Japanese "K" supercomputer, taking into account neutrino cooling and heating by an updated leakage-plus-transfer scheme for the…

High Energy Astrophysical Phenomena · Physics 2015-06-24 Yuichiro Sekiguchi , Kenta Kiuchi , Koutarou Kyutoku , Masaru Shibata

We show how observations of gravitational waves from binary neutron star (BNS) mergers over the next few years can be combined with insights from nuclear physics to obtain useful constraints on the equation of state (EoS) of dense matter,…

High Energy Astrophysical Phenomena · Physics 2019-10-23 Michael McNeil Forbes , Sukanta Bose , Sanjay Reddy , Dake Zhou , Arunava Mukherjee , Soumi De

The KIDS framework for the nuclear equation of state (EoS) and energy density functional (EDF) offers the possibility to explore systematically the effect of EoS parameters on predictions for a variety of observables. The EoS parameters can…

Nuclear Theory · Physics 2021-12-08 Panagiota Papakonstantinou

We study the equation of state (EoS) of a neutron star (NS) accounting for new advances. In the low energy density, $n\leq 0.1 n_s$, with $n_s$ the saturation density, we use a new pure neutron matter EoS that is regulator independent and…

Nuclear Theory · Physics 2024-10-22 J. M. Alarcón , E. Lope-Oter , J. A. Oller

Ab initio methods using weakly interacting nucleons give a good description of condensed nuclear matter up to densities comparable to the nuclear saturation density. At higher densities palpable strong interactions between overlapping…

High Energy Physics - Phenomenology · Physics 2021-04-14 Niko Jokela , Matti Jarvinen , Govert Nijs , Jere Remes

A pure nucleonic equation of state (EoS) for beta equilibrated charge neutral neutron star (NS) matter is determined using density dependent effective NN interaction. This EoS is found to satisfy both the constraints from the observed…

Nuclear Theory · Physics 2011-05-11 Partha Roy Chowdhury

The observation of $1.97\pm0.04$ solar-mass neutron-like star gives constraint on the equation of state (EOS) of cold, condensed matter. In this paper, the EOS for both pure quark star and hybrid star with a quark core described by…

High Energy Astrophysical Phenomena · Physics 2015-06-12 Yan Yan , Jing Cao , Xin-Lian Luo , Wei-Min Sun , Hongshi Zong

The nuclear equation of state (EoS) is investigated by flow phenomena in relativistic heavy-ion collisions, both in transverse and radial direction, in comparison to experimental data from 150 A MeV to 11 A GeV. To this aim the collective…

Nuclear Theory · Physics 2011-04-15 W. Cassing

Given an Equation of State (EOS) for neutron star (NS) matter, there is a unique mass-radius sequence characterized by a maximum mass $M_{\rm{NS}}^{\max}$ at radius $R_{\max}$. We first show analytically that the $M_{\rm{NS}}^{\max}$ and…

Nuclear Theory · Physics 2023-07-27 Bao-Jun Cai , Bao-An Li , Zhen Zhang

We overview the progress of the tables of the equation of state for astrophysical simulations and the numerical methods of neutrino transfer. Hot and dense matter play essential roles in core-collapse supernovae and neutron stars. Equation…

High Energy Astrophysical Phenomena · Physics 2021-12-22 Kohsuke Sumiyoshi

The structure and basic properties of dense nuclear matter still remain one of the open problems of Physics. In particular, the composition of the matter that composes neutron stars is under theoretical and experimental investigation. Among…

Nuclear Theory · Physics 2025-11-18 K. Folias , Ch. C. Moustakidis

In astrophysics as well as in hadron physics progress has recently been made on the determination of the hadronic equation of state (EOS) of compressed matter. The results are contradictory, however. Simulations of heavy ion reactions are…

Nuclear Theory · Physics 2009-11-11 Ch. Hartnack , H. Oeschler , Jörg Aichelin

A Bayesian method is used in this extensive work to generate a large set of minimally constrained equations of state (EOSs) for matters in neutron stars (NS). These EOSs are analyzed for their correlations with key NS properties, such as…

Nuclear Theory · Physics 2024-04-29 N. K. Patra

The equation of state (EOS) of cold dense matter is a central open problem in nuclear astrophysics. Its inference is hindered by the lack of \textit{ab initio} control above about twice nuclear saturation density, requiring extrapolation.…

High Energy Astrophysical Phenomena · Physics 2026-05-18 Bhaskar Biswas
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