Charged strange star with Krori-Barua potential in $f(R,T)$ gravity admitting Chaplygin equation of state

Abstract

In present paper a new compact star model in f(R,T) gravity is obtained where R and T denote the Ricci scalar and the trace of energy-momentum tensor $T_{\mu \nu }$ respectively. To develop the model we consider the spherically symmetric space-time along with anisotropic fluid distribution in presence of electric field with $f(R,T)=R+2\gamma T$ where $\gamma$ is a small positive constant. We have used the Chaplygin equation of state to explore the stellar model. The field equations for $f(R,T)$ gravity have been solved by employing the Krori-Barua ansatz already reported in literature [J. Phys. A, Math. Gen. 8:508, 1975]. The exterior spacetime is described by Reissner-Nordstrom line element for smooth matching at the boundary. It is worthwhile to mention here that the values of all the constants involved with this model have been calculated for the strange stars 4U 1538-52 for different values of γ with the help of matching conditions. The acceptability of the model is discussed in details both analytically and graphically by studying the physical attributes of matter density, pressures, anisotropy factor, stability etc. We have also obtained the numerical values in tabular form for central density, surface density, central pressure and central adiabatic index for different values of $\gamma$. The solutions of the field equations in Einstein gravity can be regained by simply putting $\gamma =0$ to our solution. Moreover, the proposed model is shown to be physically admissible and corroborate with experimental observations on strange star candidates such as 4U 1538-52.

arXiv commentarXiv admin note: text overlap with arXiv:2105.12572

References in corpus (28)

• f(R,T) gravity
• Unification of Dark Matter and Dark Energy: the Inhomogeneous Chaplygin Gas
• The Pre-Big Bang Scenario in String Cosmology
• Physical Acceptability of Isolated, Static, Spherically Symmetric, Perfect Fluid Solutions of Einstein's Equations
• Anisotropic Stars in General Relativity
• Reconstruction of f(R, T) gravity describing matter dominated and accelerated phases
• Reconstruction of some cosmological models in f(R,T) gravity
• Covariant conservation of energy momentum in modified gravities
• Stellar equilibrium configurations of compact stars in $f(R,T)$ gravity
• WMAP Constraints on the Generalized Chaplygin Gas Model
• Density perturbations in an Universe dominated by the Chaplygin gas
• Sharp bounds on the critical stability radius for relativistic charged spheres
• Nonadiabatic charged spherical gravitational collapse
• Singularity-free solutions for anisotropic charged fluids with Chaplygin equation of state
• Compact stars in $f(R,T)$ gravity
• Gravastars in $f(R,\mathcal{T})$ gravity
• Minimum mass-radius ratio for charged gravitational objects
• Relativistic Structure, Stability and Gravitational Collapse of Charged Neutron Stars
• Constraints on Chaplygin quartessence from the CLASS gravitational lens statistics and supernova data
• Chaplygin-like gas and branes in black hole bulks
• Anisotropic Universe Models with Perfect Fluid and Scalar Field in f(R,T) Gravity
• Supernovae constraints on models of dark energy revisited
• Existence of Compact Structures in $f(R,T)$ Gravity
• Wormholes supported by phantom-like modified Chaplygin gas
• Wormhole supported by dark energy admitting conformal motion
• Absolute Stability Limit for Relativistic Charged Spheres
• Scalar field and time varying Cosmological constant in $f(R,T)$ gravity for Bianchi type-I Universe
• Raychaudhuri's equation and aspects of relativistic charged collapse

Cited by in corpus (10)

• Relativistic Krori-Barua Compact Stars in $f(R,T)$ Gravity
• Stable and self consistent charged gravastar model within the framework of $f(R,T)$ gravity
• Tolman IV fluid sphere in f(R, T) gravity
• Strange stars in $f(\mathcal{R})$ gravity Palatini formalism and gravitational wave echoes from them
• Finch-Skea star model in f(R, T ) theory of gravity
• Gravastar model in Krori-Barua metric under $f(Q)$ gravity
• Phantom energy supported wormhole model in $f(R,T)$ gravity assuming conformal motion
• Relativistic compact stars in Tolman spacetime via an anisotropic approach
• Possible existence of stable compact stars in $\kappa (\mathcal{R},\mathcal{T})-$gravity
• A New Class of Analytical Solutions Describing Anisotropic Neutron Stars in General Relativity