Phase diagram and compact stars in a holographic QCD model

Abstract

A holographic model is used to investigate the thermodynamics and the phase diagram of a heavy quarks system. From such a model we obtain an equation of state and explore its applicability in astrophysical conditions. For this objective, we work in the context of the Einstein-Maxwell-Dilaton (EMD) holographic model for quantum chromodynamics (QCD). At first, we show the existence of a critical point where the first-order transitions line ends, later on, we calculated an analytic expression for the equation of state. Additionally, with the aim of investigating the global properties of compact stars, such as the total gravitational mass and radius, the equation of state is used to solve the Tolman-Oppenheimer-Volkov (TOV) equations for stellar structure. The numerical results show that our equation of state is able to reproduce the expected behavior of hybrid stars. Our main conclusion is that, by using an equation of state emerging in the framework of the EMD holographic model for QCD, it is possible to obtain quark matter properties and that it is also possible to extend the procedure to astrophysical applications.

16 pages, 11 figures

References in corpus (19)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Linear Confinement and AdS/QCD
• Exploring improved holographic theories for QCD: Part II
• Mimicking the QCD equation of state with a dual black hole
• Thermodynamics and bulk viscosity of approximate black hole duals to finite temperature quantum chromodynamics
• Deconfinement and Gluon Plasma Dynamics in Improved Holographic QCD
• A holographic critical point
• Toward a Systematic Holographic QCD: A Braneless Approach
• Dynamical Soft-Wall AdS/QCD
• Dynamical holographic QCD with area-law confinement and linear Regge trajectories
• Holography, Heavy-Quark Free Energy, and the QCD Phase Diagram
• Thermal entropy of a quark-antiquark pair above and below deconfinement from a dynamical holographic QCD model
• AdS/QCD duality and the quarkonia holographic information entropy
• A Refined Holographic QCD Model and QCD Phase Structure
• Bulk Filling Branes and the Baryon Density in AdS/QCD with gravity back-reaction
• Critical behavior of non-hydrodynamic quasinormal modes in a strongly coupled plasma
• Locating the QCD critical end point through the peaked baryon number susceptibilities along the freeze-out line
• Analytic Study of Magnetic Catalysis in Holographic QCD
• Conformal symmetry breaking in holographic QCD