22 research outputs found
Influence of Electric Charge and Modified Gravity on Density Irregularities
This work aims to identify some inhomogeneity factors for plane symmetric
topology with anisotropic and dissipative fluid under the effects of both
electromagnetic field as well as Palatini gravity. We construct the
modified field equations, kinematical quantities and mass function to continue
our analysis. We have explored the dynamical quantities, conservation equations
and modified Ellis equations with the help of a viable model. Some
particular cases are discussed with and without dissipation to investigate the
corresponding inhomogeneity factors. For non-radiating scenario, we examine
such factors with dust, isotropic and anisotropic matter in the presence of
charge. For dissipative fluid, we investigate the inhomogeneity factor with
charged dust cloud. We conclude that electromagnetic field increases the
inhomogeneity in matter while the extra curvature terms make the system more
homogeneous with the evolution of time.Comment: 28 pages, no figure, version accepted for publication in European
Physical Journal
Existence of Compact Structures in Gravity
The present paper is devoted to investigate the possible emergence of
relativistic compact stellar objects through modified gravity. For
anisotropic matter distribution, we used Krori and Barura solutions and two
notable and viable gravity formulations. By choosing particular
observational data, we determine the values of constant in solutions for three
relativistic compact star candidates. We have presented some physical behavior
of these relativistic compact stellar objects and some aspects like energy
density, radial as well as transverse pressure, their evolution, stability,
measure of anisotropy and energy conditions.Comment: 27 pages, 13 figures, version accepted for publication in European
Physical Journal
Role of Model on the Stability of Cylindrical Stellar Model
The aim of this paper is to investigate the stable/unstable regimes of the
non-static anisotropic filamentary stellar models in the framework of
gravity. We construct the field equations and
conservation laws in the perspective of this gravity. The perturbation scheme
is applied to analyze the behavior of a particular
cosmological model on the evolution of
cylindrical system. The role of adiabatic index is also checked in the
formulations of instability regions. We have explored the instability
constraints at Newtonian and post-Newtonian limits. Our results reinforce the
significance of adiabatic index and dark source terms in the stability analysis
of celestial objects in modified gravity.Comment: 29 pages, no figure, version accepted for publication in European
Physical Journal
Evolution of Inhomogeneous LTB Geometry with Tilted Congruence and Modified Gravity
The goal of this paper is to shed some light on the significance of congruence of observers which seems to affect the dynamics of the universe under Palatini f (R) formalism. Starting by setting up the formalism needed, we have explored the field equations using Lemaitre-Tolman-Bondi geometry as an interior metric. We have formulated the relationship between the matter variables as seen by the observers in both comoving and non-comoving frames. The dynamical equations are evaluated to study the dynamics of
inhomogeneous universe by exploring conservation equations along with the Ellis equations. We have also explored a collapsing factor describing the bouncing phenomena via transport equation and conclude the stability region.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author