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.

中文翻译：

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黑洞周围改性 Chaplygin 暗流体的影响


在这项工作中，我们研究了修正宇宙学 Chaplygin 气体 （MCG） 中的一个静态、带球电荷的 AdS 黑洞，它遵循热状态方程，作为暗能量和暗物质的统一暗流体模型。我们探讨了模型参数对 MCG 驱动的带电 AdS 黑洞 （MCG-AdSBH） 的几个特性的影响，包括测地线结构和一些天体物理现象，如零轨迹、阴影轮廓、光偏转角和灰体边界的确定。然后，我们讨论了模型参数如何影响 MCG-AdSBH 的霍金温度、残余半径和蒸发过程。准正态模式也使用 eikonal 近似方法进行研究。对 MCG-AdSBH 参数的约束来自 M87* 和 Sgr A* 的 EHT 观测，表明 MCG-AdSBH 可能是天体物理黑洞的有力候选者。