Influences of modified Chaplygin dark fluid around a black hole

S. Zare, L. M. Nieto, F. Hosseinifar, X. -H. Feng, H. Hassanabadi

Published 2024-07-16Version 1

In this work, we study a static, spherically charged AdS black hole within a modified cosmological Chaplygin gas (MCG), adhering to the calorific equation of state, as a unified dark fluid model of dark energy and dark matter. We explore the influence of model parameters on several characteristics of the MCG-motivated charged AdS black hole (MCGMBH), including the geodesic structure and some astrophysical phenomena such as null trajectories, shadow silhouettes, light deflection angles, and the determination of greybody bounds. We then discuss how the model parameters affect the Hawking temperature, remnant radius, and evaporation process of the MCGMBH. Quasinormal modes are also investigated using the eikonal approximation method. Constraints on the MCGMBH parameters are derived from EHT observations of M87* and Sgr A*, suggesting that MCGMBH could be strong candidates for astrophysical BH.