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• W4378233706 abstract "Abstract In this work, we construct a modified version of the Einstein field equations for a vacuum and spherically symmetric spacetime in terms of the Riemann–Liouville fractional derivative. The main difference between our approach and other works is that we ensure that both the classical differential equations and the classical solutions are exactly recovered in the limit when the fractional parameter is turned off. We assume that the fractional equations are valid inside and near the horizon radius and match the classical solution at the horizon. Our approach resembles the Herrera–Witten strategy (Adv High Energy Phys 2018:3839103, 2018, https://doi.org/10.1155/2018/3839103 , arXiv:1806.07143 [gr-qc]), where the authors constructed an alternative black hole solution by assuming that inside the horizon the spacetime is hyperbolically symmetric and matches the classical spherically symmetric exterior solution at one point at the horizon. We obtain that, depending on the value of the fractional parameter, the solutions can be interpreted as a regular black hole or a gravastar. As a final step, we compute the fractional curvature scalars and show that the solution is regular everywhere inside the horizon." @default.
• W4378233706 created "2023-05-26" @default.
• W4378233706 creator A5043645849 @default.
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• W4378233706 date "2023-05-24" @default.
• W4378233706 modified "2023-10-14" @default.
• W4378233706 title "A vacuum solution of modified Einstein equations based on fractional calculus" @default.
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• W4378233706 doi "https://doi.org/10.1140/epjc/s10052-023-11626-4" @default.
• W4378233706 hasPublicationYear "2023" @default.
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