Particle motion around charged black holes in generalized dilaton-axion gravity

Farook Rahaman; Irina Radinschi; Joydeep Chakraborty; Susmita Sarkar; Theophanes Grammenos

Particle motion around charged black holes in generalized dilaton-axion gravity

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arxiv 1805.00295 v2 pith:V3KZLQHX submitted 2018-04-28 gr-qc

Susmita Sarkar , Farook Rahaman , Irina Radinschi , Theophanes Grammenos , Joydeep Chakraborty This is my paper · ORCID

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The behaviour of massive and massless test particles around asymptotically flat and spherically symmetric, charged black holes in the context of generalized dilaton-axion gravity in four dimensions is studied. All the possible motions are investigated by calculating and plotting the corresponding effective potential for the massless and massive particles as well. Further, the motion of massive (charged or uncharged) test particles in the gravitational field of charged black holes in generalized dilaton-axion gravity for the cases of static and non-static equilibrium is investigated by applying the Hamilton-Jacobi approach.

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Stability Analysis of Circular Geodesics in Dyonic Dilatonic Black Hole Spacetimes
gr-qc 2024-11 conditional novelty 4.0 of 10

A proof that dyonic-like dilatonic black holes have a unique innermost stable circular orbit, plus explicit ISCO formulas for selected values of the dilaton coupling parameter.

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