On black holes surrounded by a fluid of strings in Rastall gravity

Bezerra, V. B.; Santos, L. C. N.; Silva, Franciele M. da; Moradpour, H.

doi:10.1007/s10714-022-02993-6

Cited by 3 publications

(1 citation statement)

References 51 publications

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“…Furthermore, it would be of great importance to discuss the impact of Rastall gravity on the nature of geodesic deviation and the shadow radius of different black holes [50][51][52] as the direct image of the shadow of M87* black hole by the Event Horizon Telescope collaboration [53,54] provides an exciting opportunity to examine the MTGs.…”

Section: Introductionmentioning

confidence: 99%

Quasinormal Modes and Greybody Factors of de Sitter Black Holes Surrounded by Quintessence in Rastall Gravity

Gogoi,

Heidari,

K̆rí̆z

et al. 2024

Fortschritte der Physik

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In this work, the quasinormal mode, greybody factors, and absorption cross section of de Sitter Reissner‐Nordström black hole surrounded by quintessence field in Rastall gravity are studied. The violation of energy‐momentum conservation has a non‐linear effect on the quasinormal modes. With an increase in the black hole charge, both real parts of quasinormal modes i.e. oscillation frequency of ring‐down Gravitational Waves (GWs) and damping or decay rate of GWs increase non‐linearly. A similar observation is made for the black hole structural parameter also, however in this case the variation is almost linear. The remnant mass of a black hole depends on different physical parameters of a black hole. In the case of greybody factors also, both parameters have similar impacts are observed. With an increase in these parameters, greybody factors decrease. Moreover, the null geodesics and the impact of Rastall gravity on the light trajectory are also investigated. Our study suggests that the presence of a surrounding quintessence field may shadow the existence of black hole charges in such black hole configurations.

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Section: Introductionmentioning

confidence: 99%

Quasinormal Modes and Greybody Factors of de Sitter Black Holes Surrounded by Quintessence in Rastall Gravity

Gogoi,

Heidari,

K̆rí̆z

et al. 2024

Fortschritte der Physik

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Investigating stable quark stars in Rastall-Rainbow gravity and their compatibility with gravitational wave observations

Tangphati,

Gogoi,

Pradhan

et al. 2024

Journal of High Energy Astrophysics

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Imprints of rastall gravity on particle dynamics

Iftikhar,

Aziz,

Manzoor

et al. 2023

Phys. Scr.

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In this paper, we investigate the trajectories of test particle around the Kerr-Newman anti de-Sitter black hole enclosed by scalar field matter in the context of Rastall gravity. We limit our research to the equatorial plane and analyze the dynamics of both null as well as time-like geodesics. We explore the stable regions with respect to the event horizon, radius of photon orbit and the so called static radius for both null as well as time-like particles. We found that the stable point is always less than the cosmological horizon as well as the static radius. We also discuss the energy extraction as well as negative energy state via Penrose process. The efficiency of the process from Kerr-Newman anti de-Sitter black hole is also examined. We observe that the efficiency of the Penrose process increased with the spin parameter as well the intensity of the scalar field around the BH.

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On black holes surrounded by a fluid of strings in Rastall gravity

Cited by 3 publications

References 51 publications

Quasinormal Modes and Greybody Factors of de Sitter Black Holes Surrounded by Quintessence in Rastall Gravity

Quasinormal Modes and Greybody Factors of de Sitter Black Holes Surrounded by Quintessence in Rastall Gravity

Investigating stable quark stars in Rastall-Rainbow gravity and their compatibility with gravitational wave observations

Imprints of rastall gravity on particle dynamics

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