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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…

Nuclear Theory · Physics 2022-12-14 Lin Zhang , Mei Huang

We solve the Tolman-Oppenheimer-Volkoff equation using an equation of state (EoS) calculated in holographic QCD. The aim is to use compact astrophysical objects like neutron stars as an indicator to test holographic equations of state. We…

High Energy Physics - Phenomenology · Physics 2015-05-30 Youngman Kim , Chang-Hwan Lee , Ik Jae Shin , Mew-Bing Wan

We have previously found a new phase of cold nuclear matter based on a holographic gauge theory, where baryons are introduced as instanton gas in the probe D8/$\overline{\rm D8}$ branes. In our model, we could obtain the equation of state…

High Energy Physics - Theory · Physics 2015-06-17 Kazuo Ghoroku , Kouki Kubo , Motoi Tachibana , Fumihiko Toyoda

In this paper we present a simple discussion on the properties of compact stars using an EoS obtained in effective field theory anchored on scale and hidden-local symmetric Lagrangian endowed with topology change and a unequivocal…

Nuclear Theory · Physics 2017-03-08 Kyungmin Kim , Hyun Kyu Lee , Jaehyun Lee

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

We investigate the question of the nature of compact stars, considering they may be neutron stars or hybrid stars containing a quark core, within the present constraints given by gravitational waves, radio-astronomy, X-ray emissions from…

High Energy Astrophysical Phenomena · Physics 2024-06-12 H. Güven , J. Margueron , K. Bozkurt , E. Khan

Using a Bayesian approach, we combine measurements of neutron star macroscopic observables obtained by astrophysical and gravitational observations, to derive joint constraints on the equation of state (EoS) of matter at supranuclear…

High Energy Astrophysical Phenomena · Physics 2019-10-09 Margherita Fasano , Tiziano Abdelsalhin , Andrea Maselli , Valeria Ferrari

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. Klaehn

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

GW170817 has provided valuable constraints on the equations of state of merging binary neutron stars, which can be considered as the most probable candidate for the source of gravitational waves. On the other hand, these natural…

High Energy Astrophysical Phenomena · Physics 2021-06-22 Z. Sharifi , M. Bigdeli , D. Alvarez-Castillo

A new scheme for testing nuclear matter equations of state (EsoS) at high densities using constraints from neutron star phenomenology and a flow data analysis of heavy-ion collisions is suggested. An acceptable EoS shall not allow the…

We investigate a simple holographic model for cold and dense deconfined QCD matter consisting of three quark flavors. Varying the single free parameter of the model and utilizing a Chiral Effective Theory equation of state (EoS) for nuclear…

High Energy Astrophysical Phenomena · Physics 2019-01-30 Eemeli Annala , Christian Ecker , Carlos Hoyos , Niko Jokela , David Rodríguez Fernández , Aleksi Vuorinen

We simulate the merger of binary neutron stars and analyze the spectral properties of their gravitational waveforms. For the stars we construct hybrid equations of state (EoSs) with a standard nuclear matter EoS at low densities,…

High Energy Astrophysical Phenomena · Physics 2020-05-13 Christian Ecker , Matti Järvinen , Govert Nijs , Wilke van der Schee

We construct a new effective field theory approach to the equation of state (EoS), dubbed pseudo-confomal model "PCM," for nuclear and compact star matter entirely in terms of effective hadron degrees of freedom. The possible transition at…

Nuclear Theory · Physics 2018-09-21 Yong-Liang Ma , Hyun Kyu Lee , Won-Gi Paeng , Mannque Rho

We investigate properties of nuclear matter, equation of state (EOS) of neutron stars and its mass-radius relation in a hard-wall AdS/QCD model by regarding baryons as solitonic configurations in gauge fields. Compared with previous…

Nuclear Theory · Physics 2025-11-07 Jun-Shuai Wang , Li-Kang Yang , Yin-Fang Liu , Yong-Liang Ma

Properties of neutron stars in GW170817 are investigated using different equations of state (EoS) involving nucleons, $\Lambda$ hyperons, quarks resulting in $2M_{\odot}$ neutron stars. This calculation is performed using the same EoS for…

High Energy Astrophysical Phenomena · Physics 2019-01-02 Sajad A. Bhat , Debades Bandyopadhyay

The equation of state (EoS) of hot and dense matter is a fundamental input to describe static and dynamical properties of neutron stars, core-collapse supernovae and binary compact-star mergers. We review the current status of the EoS for…

Nuclear Theory · Physics 2019-03-06 G. Fiorella Burgio , Anthea F. Fantina

We construct tables of finite temperature equation of state (EoS) of hypernuclear matter in the range of densities, temperatures, and electron fractions that are needed for numerical simulations of supernovas, proto-neutron stars, and…

Nuclear Theory · Physics 2024-07-24 Stefanos Tsiopelas , Armen Sedrakian , Micaela Oertel

The observations of compact star inspirals from LIGO/Virgo provide a valuable tool to study the highly uncertain equation of state (EOS) of dense matter at the densities in which the compact stars reside. It is not clear whether the merging…

High Energy Astrophysical Phenomena · Physics 2021-08-19 Zhiqiang Miao , Jin-Liang Jiang , Ang Li , Lie-Wen Chen

Observations of gravitational-wave signals from binary neutron-star mergers, like GW170817, can be used to constrain the neutron-star equation of state (EoS). One method involves modeling the EoS and measuring the model parameters through…

General Relativity and Quantum Cosmology · Physics 2019-01-09 Matthew F. Carney , Leslie E. Wade , Burke S. Irwin
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