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Influences of modified Chaplygin dark fluid around a black hole

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arxiv 2407.12142 v2 pith:O2ZFZM5L submitted 2024-07-16 astro-ph.HE gr-qc

Influences of modified Chaplygin dark fluid around a black hole

classification astro-ph.HE gr-qc
keywords blackdarkholemcg-adsbhmodelparametersastrophysicalchaplygin
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Cited by 1 Pith paper

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  1. Schwarzschild-like Black Holes Submerged in an Exponential Density Dark Matter Profile

    gr-qc 2026-07 conditional novelty 4.0

    An analytic Schwarzschild-like metric with an exponential dark matter halo is constructed and its shadows, quasi-normal modes, and greybody bounds are computed, though several derived expressions have sign errors.