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An effective equation of state (EoS) which generalizes the Lattimer-Swesty equation for nuclear matter is presented for matter at supernuclear densities including strange baryons. It contains an adjustable baryon potential energy density,…

核理论 · 物理学 2009-10-30 Shmuel Balberg , Avraham Gal

We describe the equation of state (EoS) of a warm ion plasma as obtained by performing microscopic many-body simulations using Molecular Dynamics computational techniques. Using the cold one-component plasma (OCP) composition in the Neutron…

高能天体物理现象 · 物理学 2026-04-22 David Barba-González , Conrado Albertus , M. Ángeles Pérez-García

An equation of state (EOS) of neutron star matter, describing both the neutron star crust and the liquid core, is calculated. It is based on the effective nuclear interaction SLy of the Skyrme type, which is particularly suitable for the…

天体物理学 · 物理学 2009-11-07 F. Douchin , P. Haensel

The equation of state (EoS) for cold dense matter inside neutron stars is investigated by using holographic QCD models in the framework of the Einstein-Maxwell-dilaton (EMD) system and the improved Karch-Katz-Son-Stephanov (KKSS) action for…

核理论 · 物理学 2022-12-14 Lin Zhang , Mei Huang

In this work we present a detailed explanation of the construction of an appropriate equation of state (EoS) for nuclear astrophysics. We use a relativistic model in order to obtain an EoS for neutrally charged matter that extends from very…

天体物理学 · 物理学 2007-05-23 D. P. Menezes , C. Providencia

We construct the equation of state (EOS) of dense matter covering a wide range of temperature, proton fraction, and density for the use of core-collapse supernova simulations. The study is based on the relativistic mean-field (RMF) theory,…

高能天体物理现象 · 物理学 2012-03-26 H. Shen , H. Toki , K. Oyamatsu , K. Sumiyoshi

Neutron stars (NS) are compact objects with strong gravitational fields, and a matter composition subject to extreme physical conditions. The properties of strongly interacting matter at ultra-high densities and temperatures impose a big…

高能天体物理现象 · 物理学 2022-10-19 R. V. Lobato , E. V. Chimanski , C. A. Bertulani

The hard sphere system plays a basic role in condensed matter physics and related fields, and equation of state (EoS) is the ultimate solution to its thermodynamic properties (1-3). Dozens of EoSs have been proposed since van der Waals…

统计力学 · 物理学 2007-05-23 Hongqin Liu

The equation-of-state (EOS) parameter $\phi \equiv P/\varepsilon$, defined as the ratio of pressure to energy density, encapsulates the fundamental response of matter under extreme compression. Its value at the center of the most massive…

核理论 · 物理学 2026-01-07 Bao-Jun Cai , Bao-An Li , Yu-Gang Ma

Equation of state (EOS) describes the thermodynamic properties of substances. It has important applications in many fields such as power mechanics, geophysics, astrophysics, and detonation physics. Currently, most EOSs have been constructed…

统计力学 · 物理学 2021-07-15 Ti-Wei Xue , Zeng-Yuan Guo

The composition and properties of infinite nuclear matter under extreme conditions of temperature and pressure remain incompletely understood. In this work, we constrain the equation of state (EoS) of nuclear matter - constructed within the…

核理论 · 物理学 2025-11-04 Rahul Kumar , Prasanta Char , Rana Nandi

The thermodynamical properties of the equation of state (EoS) of high-density matter (above nuclear saturation density) and the possible existence of exotic states such as phase transitions from nuclear/hadronic matter into quark-gluon…

高能天体物理现象 · 物理学 2019-01-28 M. A. Aloy , J. M. Ibáñez , N. Sanchis-Gual , M. Obergaulinger , J. A. Font , S. Serna , A. Marquina

The equation of state (EOS) of dense matter is an essential ingredient for numerical simulations of core-collapse supernovae and neutron star mergers. The properties of matter near and above nuclear saturation density are uncertain, which…

高能天体物理现象 · 物理学 2017-12-13 Andre da Silva Schneider , Luke F. Roberts , Christian D. Ott

The stellar compactness, that is, the dimensionless ratio between the mass and radius of a compact star, $\mathcal{C} := M/R$, plays a fundamental role in characterising the gravitational and nuclear-physics aspects of neutron stars. Yet,…

广义相对论与量子宇宙学 · 物理学 2026-01-21 Luciano Rezzolla , Christian Ecker

We study mass-radius relations for compact stars employing an equation of state (EOS) of dense matter based on a Skyrme fluid. The zero-temperature mean-field model is based on mesonic excitations, incorporates the scale breaking of QCD,…

天体物理学 · 物理学 2009-11-10 Prashanth Jaikumar , Rachid Ouyed

While the equation of state (EOS) of symmetric nuclear matter (SNM) at suprasaturation densities has been relatively well constrained from heavy-ion collisions, the EOS of high-density neutron-rich matter is still largely uncertain due to…

核理论 · 物理学 2019-06-12 Ying Zhou , Lie-Wen Chen , Zhen Zhang

The equations of state (EoSs) governing neutron star (NS) matter obtained for both non-relativistic and relativistic mean-field models are systematically confronted with a diverse set of terrestrial data and astrophysical observations…

核理论 · 物理学 2024-05-20 Sk Md Adil Imam , Tuhin Malik , Constança Providência , B. K. Agrawal

In this article we study the structure and stability of compact astrophysical objects which are ruled by the dark energy equation of state (EoS). The existence of dark energy is important for explaining the current accelerated expansion of…

广义相对论与量子宇宙学 · 物理学 2021-08-02 Ayan Banerjee , M. K. Jasim , Anirudh Pradhan

Neutron stars are regarded as natural laboratories for the study of dense strong interaction matter. The equation of state (EoS) of dense matter computed in flat spacetime is used to predict the structure of neutron stars by solving the…

广义相对论与量子宇宙学 · 物理学 2022-10-27 Jianing Li , Tao Guo , Jiaxing Zhao , Lianyi He

We calculate static properties of non-rotating neutron stars (NS's) using a microscopic equation of state (EOS) for asymmetric nuclear matter. The EOS is computed in the framework of the Brueckner--Bethe--Goldstone many--body theory. We…

核理论 · 物理学 2007-05-23 M. Baldo , G. F. Burgio , I. Bombaci