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Context. A unified equation of state (EoS) should describe the crust and the core of a neutron star using the same physical model. The Brussels-Montreal group has recently derived a family of such EoSs based on the nuclear energy-density…

Solar and Stellar Astrophysics · Physics 2015-05-14 A. Y. Potekhin , A. F. Fantina , N. Chamel , J. M. Pearson , S. Goriely

We construct the equation of state (EOS) of nuclear matter at finite temperature and density with various proton fractions within the relativistic mean field (RMF) theory for the use in the supernova simulations. The Thomas-Fermi…

Nuclear Theory · Physics 2009-10-31 H. Shen , H. Toki , K. Oyamatsu , K. Sumiyoshi

The impact of matter properties at subnuclear densities on the evolution of protoneutron stars is investigated. Several models of nuclear equation of state (EOS) are constructed with varying saturation parameters, particularly the symmetry…

High Energy Astrophysical Phenomena · Physics 2025-12-25 Ken'ichiro Nakazato , Hajime Togashi , Kohsuke Sumiyoshi , Hideyuki Suzuki

We develop a new equation of state (EoS) table involving thermal (anti)kaons, Bose-Einstein condensate of $K^{-}$ mesons and $\Lambda$-hyperons for core-collapse supernova and neutron star merger simulations. This EoS table is based on a…

High Energy Astrophysical Phenomena · Physics 2021-04-05 Tuhin Malik , Sarmistha Banik , Debades Bandyopadhyay

In this work we present the preliminary results of a complete equation of state (EoS) for core-collapse supernova simulations. We treat uniform matter made of nucleons using the the quark-meson coupling (QMC) model. We show a table with a…

Nuclear Theory · Physics 2022-07-07 Guilherme Grams , Alexandre M. Santos , Débora P. Menezes

The internal structure of neutron stars and the physical properties of nuclei depend on the equation of state (EOS) of neutron matter. Dilute neutron matter is a quantum system of spin-1/2 Fermi particles interacting via s-wave scattering.…

Quantum Gases · Physics 2019-02-07 Munekazu Horikoshi , Makoto Kuwata-Gonokami

The low density nuclear matter equation of state is strongly constrained by nuclear properties, however, for constraining the high density equation of state it is necessary to resort to indirect information obtained from the observation of…

Nuclear Theory · Physics 2021-10-04 Márcio Ferreira , Constança Providência

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…

Nuclear Theory · Physics 2024-05-20 Sk Md Adil Imam , Tuhin Malik , Constança Providência , B. K. Agrawal

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 study the equation of state (EOS) of nuclear matter as function of density. We expand the energy per particle (E/A) of symmetric infinite nuclear matter in powers of the density to take into account 2,3,. . .,N-body forces. New EOS are…

Nuclear Theory · Physics 2015-05-19 Ruslan Magana , Hua Zhenga , Aldo Bonasera

An equation of state(EOS) of nuclear matter with explicit inclusion of a spin-isospin dependent force is constructed from a finite range, momentum and density dependent effective interaction. This EOS is found to be in good agreement with…

Nuclear Theory · Physics 2009-10-30 V. S. Uma Maheswari , D. N. Basu , J. N. De , S. K. Samaddar

Nucleon self-energies and interaction potentials in supernova (SN) matter, which are known to have an important effect on nucleosynthesis conditions in SN ejecta are investigated. Corresponding weak charged-current interaction rates with…

Nuclear Theory · Physics 2015-05-22 Matthias Hempel

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…

High Energy Astrophysical Phenomena · Physics 2025-08-22 Kelsey A. Lund , Rahul Somasundaram , Gail C. McLaughlin , Jonah M. Miller , Matthew R. Mumpower , Ingo Tews

The equation of state (EoS) for neutron stars is a crucial topic in astrophysics, nuclear physics, and quantum chromodynamics (QCD), influencing their structure, stability, and observable properties. This review classifies EoS models into…

Nuclear Theory · Physics 2025-07-08 Zuhua Ji , Jiarui Chen , Yan Chen

We construct the equation of state (EOS) of finite nuclei including surface and Coulomb effects in a Thomas-Fermi framework using a finite range, momentum and density dependent two-body interaction. We identify critical temperatures for…

Nuclear Theory · Physics 2008-11-26 J. N. De , B. K. Agrawal , S. K. Samaddar

The equation of state (EOS) for neutron star (NS) crusts is studied in the Thomas-Fermi (TF) approximation using the EOS for uniform nuclear matter obtained by the variational method with the realistic nuclear Hamiltonian. The parameters…

Nuclear Theory · Physics 2010-01-07 H. Kanzawa , M. Takano , K. Oyamatsu , K. Sumiyoshi

We develop new hyperon equation of state (EoS) tables for core-collapse supernova simulations and neutron stars. These EoS tables are based on a density-dependent relativistic hadron field theory where baryon-baryon interaction is mediated…

High Energy Astrophysical Phenomena · Physics 2015-03-03 Sarmistha Banik , Matthias Hempel , Debades Bandyopadhyay

By implementing widely-used equations of state (EOS) from Lattimer & Swesty (LS) and H. Shen et al. (SHEN) in core-collapse supernova simulations, we explore possible impacts of these EOS on the post-bounce dynamics prior to the onset of…

High Energy Astrophysical Phenomena · Physics 2015-03-20 Yudai Suwa , Tomoya Takiwaki , Kei Kotake , Tobias Fischer , Matthias Liebendoerfer , Katsuhiko Sato

Rapid access to accurate equation-of-state (EOS) data is crucial in the warm-dense matter regime, as it is employed in various applications, such as providing input for hydrodynamic codes to model inertial confinement fusion processes. In…

Computational Physics · Physics 2023-12-12 Timothy J. Callow , Jan Nikl , Eli Kraisler , Attila Cangi

Twin stars-two stable neutron stars (NSs) with the same mass but different radii have long been proposed to appear as a consequence of a possible first-order phase transition in NS matter. Within a meta-model for the EOS of hybrid stars, we…

Nuclear Theory · Physics 2025-02-13 Nai-Bo Zhang , Bao-An Li