Phys.Lett.B, 859, 139125 (2024)
Influences of modified Chaplygin dark fluid around a black hole
S. Zare1, L. M. Nieto1, F. Hosseinifar2, Xing-Hui Feng3 and Hassan Hassanabadi2
1 Departamento de Física Teórica, Atómica y Optica and Laboratory for Disruptive, Interdisciplinary Science (LaDIS), Universidad de Valladolid, 47011 Valladolid, Spain.
2 Department of Physics, Faculty of Science, University of Hradec Králové, Rokitanského 62, 500 03 Hradec Králové, Czech.
3 Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin 300350, China.
* szare@uva.es, luismiguel.nieto.calzada@uva.es, f.hoseinifar94@gmail.com, xhfeng@tju.edu.cn, hha1349@gmail.com
Abstract
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 (MCG-AdSBH), 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 MCG-AdSBH. Quasinormal modes are also investigated using the eikonal approximation method. Constraints on the MCG-AdSBH parameters are derived from EHT observations of M87* and Sgr A*, suggesting that MCG-AdSBH could be strong candidates for astrophysical black hole.
