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Ruppeiner Geometry of the RN-AdS Black Hole Using Shadow Formalism

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arxiv 2107.12615 v1 pith:A576MUPQ submitted 2021-07-27 gr-qc hep-th

Ruppeiner Geometry of the RN-AdS Black Hole Using Shadow Formalism

classification gr-qc hep-th
keywords blackholeshadowgeometryphaseradiusruppeineradopted
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The connection between the shadow radius and the Ruppeiner geometry of a charged static spherically symmetric black hole is investigated. The normalized curvature scalar is adopted, and its close relation to the Van der Waals-like and Hawking-Page phase transition of Reissner-Nordstr\"{o}m AdS black hole is studied. The results show that the shadow radius is a useful tool to reveal the correct information of the phase structure and the underlying microstructure of the black hole, which opens a new window to investigate the strong gravity system from the observational point of view.

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