A New Model of Quintessence Compact Stars in Rastall Theory of Gravity

Abstract

In the present work, we study a new model of anisotropic compact stars in the regime of Rastall theory. To solve the Rastall field equations we have used the Karori and Barua (KB) ansatz along with the quintessence dark energy characterized by a parameter ${\omega }_q$ with $-1<{\omega }_q<-\frac{1}{3}$. We present a comparative study to demonstrate the physical acceptance of our proposed model. We compare the numerical values of physical parameters obtained from our model with those of general relativity ($GR$) model given by Bhar \cite{1} and observe that our model is more compatible (for some chosen values of Rastall dimensionless parameter $\gamma =\kappa \lambda$) with observational data than $GR$ model. For this analysis we have consider four different compact stars, $SAXJ1808-3658(SSI)$, $4U1820-30$, $VelaX-12$ and $PSRJ1416-2230$ with radii $7.07km$, $10km$, $9.99km$ and $10.3km$, respectively. In this investigation we also present some physical aspects of the proposed model necessary to check the validity of the model and inferred that our model is acceptable physically and geometrically.

arXiv comment20 pages, 16 figures, 8 tables, Accepted for Publication in Eur. Physical Journal A

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• Ricci Inverse Anisotropic Stellar Structures
• Generalized Rastall's gravity and its effects on compact objects
• Compact stars in Rastall gravity: hydrostatic equilibrium and radial pulsations
• Rapidly rotating compact stars in Rastall's gravity
• Study on anisotropic strange stars in $f(\mathbb{T},\mathcal{T})$ gravity
• Shadow, absorption and Hawking radiation of a Schwarzschild black hole surrounded by a cloud of strings in Rastall gravity
• CFT Duals on Rotating Charged Black Holes Surrounded by Quintessence
• Rotating black holes and exotic compact objects in the Kerr/CFT correspondence within Rastall gravity
• Null Fluid collapse in Rastall theory of gravity
• Effects of Rastall parameter on perturbation of dark sectors of the Universe
• Lemaitre-Tolman-Bondi Static Universe in Rastall-like Gravity
• Modeling Gravastar Structure admitting Kuchowicz Spacetime in Rastall Gravity Theory
• Thermodynamic analysis of a compact object in Rastall-Rainbow gravity