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Study of circular geodesics and shadow of rotating charged black hole surrounded by perfect fluid dark matter immersed in plasma

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arxiv 2110.11704 v2 pith:HU3V2KFN submitted 2021-10-22 gr-qc

Anish Das , Ashis Saha , Sunandan Gangopadhyay This is my paper · ORCID
classification gr-qc
keywords blackholeplasmadarkfluidgeodesicsmatterperfect
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abstract

In this work, we consider a rotating charged black hole surrounded by perfect fluid dark matter. We consider the system to be immersed in non-magnetised, pressureless plasma. First, we evaluate the null geodesics in order to study the co-rotating and counter rotating photon orbits. Further, we analyse the null geodesics to calculate the celestial coordinates ($\alpha, \beta$). The celestial coordinates are used to determine the black hole shadow radius ($R_s$). Thereafter, we observe and analyse the effects of black hole spacetime, perfect fluid dark matter and plasma parameters ($a$, $Q$, $\chi$, $k$) on the black hole shadow in detail. Finally, we study the effect of plasma distribution on the effective potential ($V_{eff}$) of the black hole spacetime as encountered by the photons. We also present bounds on the plasma parameter from the observational data from $M87^{*}$ central supermassive black hole.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Dark Matter Signatures in Black Hole Thermodynamics and Information Recovery

    gr-qc 2026-08 conditional novelty 4.0 of 10

    For black holes embedded in perfect fluid dark matter, the island formula reproduces the Page curve and predicts that higher dark matter density shortens the Page time by raising the Hawking temperature.

  2. Plasma effects on gravitational lensing and shadow observables of a Kerr-like black hole in a dark matter halo

    gr-qc 2026-03 conditional novelty 4.0 of 10

    Homogeneous plasma enlarges Kerr-like black-hole shadows and emission rates while inhomogeneous plasma shrinks them; astrophysical dark-matter densities leave photon orbits essentially unchanged.

  3. Optical Appearance and Shadow of Kalb-Ramond Black Hole: Effects of Plasma and Accretion Models

    gr-qc 2025-06 conditional novelty 4.0 of 10

    For a static Kalb-Ramond black hole, increasing the Lorentz-breaking parameters shrinks the shadow, while plasma shrinks the shadow but brightens it, giving tentative signatures to distinguish it from Schwarzschild.

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