Hybrid star within $f(\mathcal{G})$ gravity

Abstract

The purpose of this work is to investigate some interesting features of a static anisotropic relativistic stellar object composed of two different types of fluid distributions typically termed as quark matter (QM) and ordinary baryonic matter (OBM) together with Krori-Barua type (KB) {\em ansatz} in the regime of modified $f(\mathcal{G})$ gravity, where $\mathcal{G}$ being the Gauss-Bonnet invariant term. In order to explain the correlation between pressure and matter density for the quark matter distribution within the compact object, we have taken into consideration the well-known MIT bag equation of state (EoS) whereas there is a simple linear correlation between pressure and matter density for ordinary baryonic matter. Furthermore, using graphical representations for varying parameters, the physical credibility of our obtained solutions has been intensively examined by regularity checking of the metric coefficients and matter variables, energy conditions, mass function, and causality conditions. For these analyses, we consider a particular compact stellar candidate 4U 1538-52. Finally, we found that the resulting outcome depicts the viability of the considered hybrid stellar model.

15 pages, 8 figures, 2 tables

References in corpus (23)

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Shapiro delay measurement of a two solar mass neutron star
• f(R,T) gravity
• Extended Theories of Gravity and their Cosmological and Astrophysical Applications
• Sound Speeds, Cracking and Stability of Self-Gravitating Anisotropic Compact Objects
• Dark energy in modified Gauss-Bonnet gravity: late-time acceleration and the hierarchy problem
• Construction of cosmologically viable f(G) gravity models
• String-inspired Gauss-Bonnet gravity reconstructed from the universe expansion history and yielding the transition from matter dominance to dark energy
• Energy conditions in the epoch of galaxy formation
• From inflation to dark energy in the non-minimal modified gravity
• Constraining f(R) theories with the energy conditions
• Observational evidence for cosmological coupling of black holes and its implications for an astrophysical source of dark energy
• On the Stability of a class of Modified Gravitational Models
• Charged compact star in $f(R,T)$ gravity in Tolman-Kuchowicz spacetime
• Gauss-Bonnet Gravitational Baryogenesis
• Charged strange star in $f(R,T)$ gravity with linear equation of state
• Stable and self consistent charged gravastar model within the framework of $f(R,T)$ gravity
• Confront $f(R,T)=\mathcal{R}+\beta T$ modified gravity with the massive pulsar PSR J0740+6620
• Tolman IV fluid sphere in f(R, T) gravity
• Study of Compact Stars in $\mathcal{R}+\alpha \mathcal{A}$ Gravity
• Finch-Skea star model in f(R, T ) theory of gravity
• Charged strange star model in Tolman-Kuchowicz spacetime in the background of 5D Einstein-Maxwell-Gauss-Bonnet gravity
• Bardeen Compact Stars in Modified $f(R)$ Gravity with Conformal Motion