Electromagnetic effects on the evolution of LTB geometry in modified gravity

Yousaf, Z.; Bhatti, M. Z.; Rafaqat, Aamna

doi:10.1007/s10509-017-3045-8

Cited by 22 publications

(6 citation statements)

References 56 publications

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“…Ref. [20] studied the effects of Palatini f (R) gravity together with the so-called tilted observer on the dynamics of LTB spacetime embedded in an electromagnetic field.…”

Section: Introductionmentioning

confidence: 99%

High-derivatives and massive electromagnetic models in the Lemaître–Tolman–Bondi spacetime

2020

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The Maxwell electromagnetic theory embedded in an inhomogeneous Lemaître-Tolman-Bondi (LTB) spacetime background was described a few years back in the literature. However, terms concerning the mass or high-derivatives were no explored. In this work we studied the inhomogeneous spacetime effects on high-derivatives and massive electromagnetic models. We used the LTB metric and calculated the physical quantities of interest, namely the scale factor, density of the eletromagnetic field and Hubble constant, for the Proca and higher-derivative Podolsky models. We found a new singularity in both models, and that the magnetic field must be zero in the Proca model.

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“…Ref. [20] studied the effects of Palatini f (R) gravity together with the so-called tilted observer on the dynamics of LTB spacetime embedded in an electromagnetic field.…”

Section: Introductionmentioning

confidence: 99%

High-derivatives and massive electromagnetic models in the Lemaître–Tolman–Bondi spacetime

2020

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“…Herrera et al [54] presented the generalization of LTB space-time by introducing tilted-congruence and explores the effects inhomogeneity of energy composition. Yousaf et al [55,56] performed the evolution of LTB geometry under the investigation of tilted-congruence with and without the influence of charged field in the perspective of MGTs. Fernandes et al [57] checked the consequences of higher derivatives corrections on LTB space-time.…”

Section: Introductionmentioning

confidence: 99%

Study of generalized Lemaître–Tolman–Bondi spacetime in Palatini f(R) gravity

et al. 2022

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The objective of this paper is to investigate the continuation of Lemaître–Tolman–Bondi (LTB) space-time for dissipative dust configuration in the direction of Palatini f(R) theory. In this context, the generalized form of field and dynamical equations will be formulated. We explore the effects of kinematical variables and curvature invariant on our proposed fluid configuration. The significance of Palatini f(R) scalar variables computing through the orthogonal splitting of Riemann-tensor for dissipative dust spheres will be reported. Furthermore, two subcases of LTB space-time have been carried out to note down its symmetric aspects. It is revealed that extended LTB space-time has characteristics comparable to that of LTB and computed scalar variables in both situations have identical dependance on source profile even under the effects of Palatini technique.

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“…LTB spacetimes have the drawback that they do not allow dissipative fluxes. Yousaf et al [17] examined the evolution of LTB spacetime under the influence of charge in Palatini f (R) gravity. They established the relationship between comoving and tilted observers by considering the effects of charge for dust and imperfect fluid respectively and also studied the f (R) models in LTB geometry in the presence of dissipative fluid.…”

Section: Introductionmentioning

confidence: 99%

Generalized Lemaítre–Tolman–Bondi spacetime under the influence of electric charge and Palatini f(R) gravity

2021

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The objective of this article is to investigate the effects of electromagnetic field on the generalization of Lemaître–Tolman–Bondi (LTB) spacetime by keeping in view the Palatini f(R) gravity and dissipative dust fluid. For performing this analysis, we followed the strategy deployed by Herrera et al. (Phys Rev D 82(2):024021, 2010). We have explored the modified field equations along with kinematical quantities and mass function and constructed the evolution equations to study the dynamics of inhomogeneous universe along with Raychauduary and Ellis equations. We have developed the relation for Palatini f(R) scalar functions by splitting the Riemann curvature tensor orthogonally and associated them with metric coefficients using modified field equations. We have formulated these scalar functions for LTB and its generalized version, i.e., GLTB under the influence of charge. The properties of GLTB spacetime are consistent with those of the LTB geometry and the scalar functions found in both cases are comparable in the presence of charge and Palatini f(R) curvature terms. The symmetric properties of generalized LTB spacetime are also studied using streaming out and diffusion approximations.

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Electromagnetic effects on the evolution of LTB geometry in modified gravity

Cited by 22 publications

References 56 publications

High-derivatives and massive electromagnetic models in the Lemaître–Tolman–Bondi spacetime

High-derivatives and massive electromagnetic models in the Lemaître–Tolman–Bondi spacetime

Study of generalized Lemaître–Tolman–Bondi spacetime in Palatini f(R) gravity

Generalized Lemaítre–Tolman–Bondi spacetime under the influence of electric charge and Palatini f(R) gravity

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