DYNAMICS OF TEST PARTICLES AROUND HAYWARD BLACK HOLES
Keywords:
Black holes, Nonlinear electrodynamics, Quintessential field, Valery Kiselev model, Hayward black hole.Abstract
In this work, a charged regular black hole with spherical symmetry is considered - a model proposed by Sean A. Hayward. This model is a modification of the classical solution developed by Hans Reissner and Gunnar Nordström in the case of Albert Einstein's equations coupled with nonlinear electrodynamics. During the study, the critical mass values and the normalization coefficient of the black hole are determined. Also, the structure of horizons and the extreme state condition in a Hayward black hole surrounded by a quintessence field are analyzed in detail.
The properties of the effective potential function are studied when the quintessence state parameter is specially taken as ω_q=-2/3. This determines the stability conditions of the particle motion and the nature of possible orbitals. The work analyzes important invariant quantities of the space-time geometry, including scalar invariants, as well as the radius of the innermost stable circular orbit (ISCO). In addition, the dynamical motion of test particles around the Hayward black hole is studied in depth.
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