Non-Singular gravitational collapse in generalized Rastall theory

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Ziaie Amir Hadi

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Journal Paper

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Journal: JOURNAL OF RESEARCH ON MANY BODY SYSTEMS Year:2020 | Volume:10 | Issue:3 Page(s): 47-60

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Title

Non-Singular gravitational collapse in generalized Rastall theory

Author(s)

Ziaie Amir Hadi | Issue Writer Certificate

Keywords

Gravitational collapseQ1

Spacetime singularityQ1

Singularity avoidanceQ1

Modified gravityQ1

Abstract

In the present work we study the process of Gravitational collapse of a homogeneous dust in the framework of generalized Rastall gravity. In this theory, the Rastall coupling parameter is a variable and since this parameter represents the measure of mutual interaction between matter and geometry it is expected that such an interaction affects the collapse dynamics and its end product. Motivated by this idea, we search for non-singular solutions for the interior spacetime of the collapsing dust fluid. We observe that this scenario is feasible for a suitable choice of the functionality of the coupling parameter such that the singularity present in homogeneous dust collapse is replaced by a non-singular bounce where the energy density and spacetime curvature are finite. We also observe that such a variable coupling affects the dynamics of apparent horizon so that, in comparison to the singular case where the apparent horizon covers the Spacetime singularity, the apparent horizon can be delayed or failed to form providing thus the possibility of detecting the bouncing object by external observers.

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APA: Copy

Ziaie, Amir Hadi. (2020). Non-Singular gravitational collapse in generalized Rastall theory. JOURNAL OF RESEARCH ON MANY BODY SYSTEMS, 10(3 ), 47-60. SID. https://sid.ir/paper/399723/en

Vancouver: Copy

Ziaie Amir Hadi. Non-Singular gravitational collapse in generalized Rastall theory. JOURNAL OF RESEARCH ON MANY BODY SYSTEMS[Internet]. 2020;10(3 ):47-60. Available from: https://sid.ir/paper/399723/en

IEEE: Copy

Amir Hadi Ziaie, “Non-Singular gravitational collapse in generalized Rastall theory,” JOURNAL OF RESEARCH ON MANY BODY SYSTEMS, vol. 10, no. 3 , pp. 47–60, 2020, [Online]. Available: https://sid.ir/paper/399723/en

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