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Compact stars with variable cosmological constant in \(f(\mathcal{R,T})\) gravity

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Abstract

This paper explores and analyzes a set of solutions describing the interior structure of relativistic compact stellar structures with variable cosmological constant \(\Lambda (r)\). We consider the solution of Krori–Barua space-time to a static spherical symmetric metric. Furthermore, we match our interior stellar structure with the exterior Schwarzschild geometry to determine the values of the constants used in the solution of the Krori–Barua space-time. The numerical values of these constants were determined for a set of different compact stars, and using these constants in our solutions, we have studied the viability of matter content, stability, TOV equations, and surface red-shift; and we predicted some physical aspects like central and surface densities, stresses, masses, and radii.

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Acknowledgements

This work has been supported financially by Start-Up Research Grant Program (SRGP), Higher Education Commission, Pakistan under research project No. 2681.

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  1. Institute of Physics and Electronics, Gomal University, Dera Ismail Khan, 29220, Khyber Pakhtunkhwa, Pakistan

    M. Ilyas

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  1. M. Ilyas
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Ilyas, M. Compact stars with variable cosmological constant in \(f(\mathcal{R,T})\) gravity. Astrophys Space Sci 365, 180 (2020). https://doi.org/10.1007/s10509-020-03888-1

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