The Theory of Gravitation: A Tale of Many Questions and Few Answers

Herrera, L.

doi:10.1088/1742-6596/831/1/012001

Cited by 10 publications

(3 citation statements)

References 105 publications

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“…relations. There has been very interesting works of the evolution of relativistic systems on non-comoving (tilted) frames [45][46][47][48][49][50][51]. Herrera and Santos [52] discussed that the gravitational collapse is highly dissipative phenomenon to study the physical characteristics of stellar objects.…”

Section: Interior Spacetimementioning

confidence: 99%

Dissipative self-gravitating systems in modified gravity

Bhatti

Bamba

Yousaf

et al. 2019

J. Cosmol. Astropart. Phys.

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We discuss the gravitational collapse of spherical compact objects in the background of f (R, T, Q) theory, where R represent the Ricci scalar, T is the trace of energy momentum tensor while Q ≡ R µν T µν , and investigate the influence of anisotropy and heat dissipation in this scenario. We provide an analysis on the role of distinct material terms considered while studying the dynamical equation. The dynamical equation is coupled with a heat transport equation and discussed in the background of f (R, T, Q) theory of gravity. The reduction element in the density of inertial mass, is re-acquired which is based on the internal position of thermodynamics. In collation with the equivalence relation, the reduction quantity in density is similar as appeared with gravitational force. We formulate the connection of Weyl tensor with different matter variables to see the non-identical outcomes. The inhomogeneous nature of energy density is also analyzed in the framework of modified gravity.

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Section: Interior Spacetimementioning

confidence: 99%

Dissipative self-gravitating systems in modified gravity

Bhatti

Bamba

Yousaf

et al. 2019

J. Cosmol. Astropart. Phys.

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“…Yousaf et al [61] modified these results and looked into the effects of Palatini f (R) terms in the rate of gravitational collapse. Most recently, Herrera [62] investigated that why observations of non-comoving congruences observe dissipation from the celestial objects which seem to be isentropic for moving observers.…”

Section: Introductionmentioning

confidence: 99%

On the role of f (G, T) terms in structure scalars

Yousaf

2019

Eur. Phys. J. Plus

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This work is devoted to explore the effects of f (G, T ) terms on the study of structure scalars and their influences in the formulations of the Raychaudhuri, shear and Weyl scalar equations. For this purpose, we have assumed non-static spherically symmetric geometry coupled with shearing viscous locally anisotropic dissipative matter content. We have developed relations among the Misner-Sharp mass, Weyl scalar, matter and structure variables. We have also formulated set of f (G, T ) structure scalars after orthogonally breaking down of the Riemann curvature tensor. The influences of these scalar functions in the modeling of relativistic radiating spheres are also studied. The factor involved in the emergence of inhomogeneities is also explored for the constant and varying modified curvature corrections. We inferred that f (G, T ) structure scalars could lead provide an effective tool to study Penrose-Hawking singularity theorems and Newman-Penrose formalism.

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“…Yousaf et al [53] modified these results by invoking Palatini f (R) corrections. Recently, Herrera [54] illustrated the answer to the question why observations of tilted congruences show a dissipative process in stellar interiors which seem to be isentropic for non-tilted observers.…”

Section: Introductionmentioning

confidence: 99%

Evolution of compact stars and dark dynamical variables

2017

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This work aims to explore the dark dynamical effects of the f (R, T ) modified gravity theory on the dynamics of a compact celestial star. We have taken the interior geometry of a spherical star which is filled with an imperfect fluid distribution. The modified field equations are explored by taking a particular form of the. These equations are utilized to formulate the well-known structure scalars under the dark dynamical effects of this higher-order gravity theory. Also, with the help of these scalar variables, the evolution equations for expansion and shear are formulated. The whole analysis is made under the condition of a constant R and T . We found a crucial significance of dark source terms and dynamical variables on the evolution and density inhomogeneity of compact objects.

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The Theory of Gravitation: A Tale of Many Questions and Few Answers

Cited by 10 publications

References 105 publications

Dissipative self-gravitating systems in modified gravity

Dissipative self-gravitating systems in modified gravity

On the role of f (G, T) terms in structure scalars

Evolution of compact stars and dark dynamical variables

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