Gravastars in f (R, G) gravity

MZ Bhatti, Z Yousaf, A Rehman - Physics of the Dark Universe, 2020 - Elsevier
In this paper, we discuss some feasible features of gravastar that was firstly demonstrated by
Mazur and Mottola. It is already established that gravastar associates the de-Sitter …

Singularity-free anisotropic strange quintessence stars in theory of gravity

A Malik, A Tariq, SA Mardan, I Noureen - The European Physical Journal …, 2023 - Springer
In this article, we present a detailed model of anisotropic quintessence stars in the
hypothesis of f (R, ϕ, X) gravity, where R is the Ricci scalar, ϕ represents the potential scalar …

Coincident gravity: black holes, regular black holes, and black bounces

JTSS Junior, ME Rodrigues - The European Physical Journal C, 2023 - Springer
In this paper, we will use the coincident gauge to investigate new solutions of the f (Q) theory
applied in the context of black holes, regular black holes, and the black-bounce spacetime …

[HTML][HTML] A study of cylindrically symmetric solutions in theory of gravity

A Malik, A Nafees, A Ali, MN Butt - The European Physical Journal C, 2022 - Springer
In this article, we aim to investigate some cylindrically symmetric solutions in a very well
known modified theory named as\(f (R,\phi, X)\) theory of gravity, where the terms R,\(\phi\) …

Noether symmetry approach in gravity

MF Shamir, M Ahmad - The European Physical Journal C, 2017 - Springer
We explore the recently introduced modified Gauss–Bonnet gravity (Sharif and Ikram in Eur
Phys JC 76: 640, 2016), f (G, T) f (G, T) pragmatic with GG, the Gauss–Bonnet term, and T …

Regular black holes in gravity coupled to nonlinear electrodynamics

ME Rodrigues, ELB Junior, GT Marques, VT Zanchin - Physical Review D, 2016 - APS
We obtain a class of regular black hole solutions in four-dimensional f (R) gravity, R being
the curvature scalar, coupled to a nonlinear electromagnetic source. The metric formalism is …

Regular black holes in f (T) Gravity through a nonlinear electrodynamics source

ELB Junior, ME Rodrigues… - Journal of Cosmology …, 2015 - iopscience.iop.org
We seek to obtain a new class of exact solutions of regular black holes in f (T) Gravity with
non-linear electrodynamics material content, with spherical symmetry in 4D. The equations …

Some dark energy cosmological models in f (R, ϕ) gravity

A Malik, M Ahmad, S Mahmood - New Astronomy, 2021 - Elsevier
In this paper, locally rotationally symmetric Bianchi type-I cosmological models in f (R, ϕ)
theory of gravity have been investigated, where R and ϕ are Ricci scalar and scalar …

Comprehensive study of cylindrical Levi-Civita and cosmic string solutions in Rastall theory of gravity

A Malik - Chinese Journal of Physics, 2023 - Elsevier
In this manuscript, the main aim is to investigate the cylindrically symmetric solutions in a
well known Rastall theory of gravity. For this purpose, we consider the cylindrically …

Rotating charged black hole spacetimes in quadratic gravitational theories

GGL Nashed - International Journal of Modern Physics D, 2018 - World Scientific
Motivated by the substantial modifications of gravitational theories and by the models that
come out of f (R), we apply the field equation of the charged f (R)= R+ β R 2 as well as a …