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arXiv · 2603.14159

Born-Infeld AdS Black Holes Surrounded by Perfect Fluid Dark Matter

Behzad Eslam Panah·Bilel Hamil·Manuel E. Rodrigues
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Abstract

We obtain exact charged AdS black hole solutions in Einstein Lambda gravity including the effects of Born Infeld nonlinear electrodynamics and Perfect Fluid Dark Matter. The influence of the PFDM and BI parameters on the event horizon is analyzed. We compute the conserved and thermodynamic quantities and verify that they satisfy the first law of thermodynamics. Thermal stability is studied in the canonical ensemble using the heat capacity and Helmholtz free energy showing how PFDM and BI parameters affect local and global stability regions. We further investigate the thermodynamics in the extended phase space by treating the cosmological constant as thermodynamic pressure obtaining consistent conserved quantities and confirming the first law. The Ehrenfest equations are analytically verified demonstrating that the critical behavior corresponds to a second order phase transition. Heat engines associated with these black holes are also constructed to examine how PFDM and BI parameters influence their efficiency. Finally we analyze the geodesic structure through timelike and null trajectories using the effective potential determining conditions for stable and unstable circular orbits the innermost stable circular orbit and the photon sphere. PFDM significantly modifies the orbital structure while BI corrections are weaker.

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Behzad Eslam Panah, Bilel Hamil, Manuel E. Rodrigues. 2026-03-15. Born-Infeld AdS Black Holes Surrounded by Perfect Fluid Dark Matter. https://doi.org/10.1140/epjc%2Fs10052-026-15823-9

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