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A new scheme for testing the nuclear matter (NM) equation of state (EoS) at high densities using constraints from compact star (CS) phenomenology is applied to neutron stars with a core of deconfined quark matter (QM). An acceptable EoS…

Astrophysics · Physics 2007-05-23 H. Grigorian , D. Blaschke , T. Klahn

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

We review the composition and the equation of state of the hyperonic core of neutron stars at finite temperature within a relativistic mean-field approach. We make use of the new FSU2H* model, which is built upon the FSU2H scheme by…

Nuclear Theory · Physics 2022-11-30 Hristijan Kochankovski , Angels Ramos , Laura Tolos

We present a comprehensive analysis of hot and dilute isospin-asymmetric nuclear matter employing the temperature-dependent effective-relativistic mean-field theory (E-RMF). The E-RMF is applied to study the effect of $\delta$ and…

Nuclear Theory · Physics 2023-03-15 Vishal Parmar , Manoj K Sharma , S K Patra

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

We study observational signatures of the hadron-quark crossover in binary-neutron-star mergers by numerical-relativity simulations with various mass configurations. We employ two equations of state (EoSs) for matter consistent with…

High Energy Astrophysical Phenomena · Physics 2025-03-24 Yuki Fujimoto , Kenji Fukushima , Kenta Hotokezaka , Koutarou Kyutoku

Gravitational-wave (GW) observations of neutron star-black hole (NSBH) mergers are sensitive to the nuclear equation of state (EOS). We present a new methodology for EOS inference with non-parametric Gaussian process (GP) priors, enabling…

General Relativity and Quantum Cosmology · Physics 2024-07-10 Nikhil Sarin , Hiranya V. Peiris , Daniel J. Mortlock , Justin Alsing , Samaya M. Nissanke , Stephen M. Feeney

We develop equation of state (EoS) of proto-neutron stars (PNSs) at various stages of evolution by varying entropy per baryon $S$, using the Korea-IBS-Daegu-SKKU density functional model. With finite values for both temperature and density,…

Nuclear Theory · Physics 2025-11-26 Atanu Guha , Debashree Sen , Hana Gil , Hajime Togashi , Chang Ho Hyun

This work investigates hot quark matter under the thermodynamic conditions characteristic of a binary neutron star (BNS) merger remnants. We used the density-dependent quark mass model (DDQM) to access the microscopic nuclear equation of…

High Energy Physics - Phenomenology · Physics 2025-07-29 Adamu Issifu , Tobias Frederico

A new density dependent effective baryon-baryon interaction has been recently derived from the quark-meson-coupling (QMC) model, offering impressive results in application to finite nuclei and dense baryon matter. This self-consistent,…

Nuclear Theory · Physics 2008-11-26 J. Rikovska-Stone , P. A. M. Guichon , H. H. Matevosyan , A. W. Thomas

We discuss to which extent the modifications of the hyperon--scalar-meson coupling constants affect the equation of state (EoS) hypernuclear matter. The study is carried out within a relativistic density functional theory. The nucleonic…

Nuclear Theory · Physics 2014-04-04 Giuseppe Colucci , Armen Sedrakian

We present ${\tt NRPMw}$, an analytical model of gravitational-waves from neutron star merger remnants informed using 618 numerical relativity (NR) simulations. ${\tt NRPMw}$ is designed in the frequency domain using a combination of…

General Relativity and Quantum Cosmology · Physics 2022-05-19 Matteo Breschi , Sebastiano Bernuzzi , Kabir Chakravarti , Alessandro Camilletti , Aviral Prakash , Albino Perego

In quantum gravity phenomenology, the effect of the generalized uncertainty principle (GUP) on white dwarfs has been given much attention in the literature. However, these studies assume a zero temperature equation of state (EoS),…

High Energy Physics - Phenomenology · Physics 2023-07-12 James David M. Tuñacao , Adrian G. Abac , Roland Emerito S. Otadoy

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

The question of correlations among empirical equation of state (EoS) parameters constrained by nuclear observables is addressed in a fully empirical meta-modeling approach. A recently proposed meta-modeling for the nuclear EoS in nuclear…

Nuclear Theory · Physics 2017-12-27 D. Chatterjee , F. Gulminelli , Ad. R. Raduta , J. Margueron

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…

General Relativity and Quantum Cosmology · Physics 2009-11-06 Kenta Kiuchi , Yuichiro Sekiguchi , Masaru Shibata , Keisuke Taniguchi

We adopt two- and three-body nuclear forces derived at the next-to-next-to-leading-order (N2LO) in the framework of effective chiral perturbation theory (ChPT) to calculate the equation of state (EOS) of $\beta$-stable neutron star matter…

High Energy Astrophysical Phenomena · Physics 2018-06-27 Domenico Logoteta , Ignazio Bombaci

We have conducted an extensive study using a diverse set of equations of state (EoSs) to uncover strong relationships between neutron star (NS) observables and the underlying EoS parameters using symbolic regression method. These EoS…

Nuclear Theory · Physics 2025-04-17 N. K. Patra , Tuhin Malik , Helena Pais , Kai Zhou , B. K. Agrawal , Constança Providência

We present sets of equation of state (EOS) of nuclear matter including hyperons using an SU_f(3) extended relativistic mean field (RMF) model with a wide coverage of density, temperature, and charge fraction for numerical simulations of…

Nuclear Theory · Physics 2008-11-26 C. Ishizuka , A. Ohnishi , K. Tsubakihara , K. Sumiyoshi , S. Yamada

This study analyzes and contrasts different phenomenological methods used to model the nuclear equation of state (EOS) for neutron star matter based on covariant energy density functionals (CEDF). Using two complementary methodologies, we…