Thermodynamics and null geodesics of a Schwarzschild black hole surrounded by a Dehnen type dark matter halo

Gohain, Mrinnoy M.; Phukon, Prabwal; Bhuyan, Kalyan

doi:10.1016/j.dark.2024.101683

Physics of the Dark Universe

2024

DOI: 10.1016/j.dark.2024.101683

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Thermodynamics and null geodesics of a Schwarzschild black hole surrounded by a Dehnen type dark matter halo

Mrinnoy M. Gohain,

Prabwal Phukon,

Kalyan Bhuyan

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Cited by 2 publications

References 65 publications

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Some new properties of black holes in the quantum Oppenheimer-Snyder model

Dong,

Hosseinifar,

Studnička

et al. 2025

Physics Letters B

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Some new properties of black holes in the quantum Oppenheimer-Snyder model

Dong,

Hosseinifar,

Studnička

et al. 2025

Physics Letters B

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Quasinormal modes and shadow of Schwarzschild black holes embedded in a Dehnen-type dark matter halo exhibiting a cloud of strings

Al-Badawi,

Shaymatov

2024

Commun. Theor. Phys.

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In this paper, we investigate a static spherically symmetric black hole (BH) embedded in a Dehnen-(1,4,0) type dark matter (DM) halo in the presence of a cloud string. We examine and presente data on how the core density of the DM halo parameter and the cloud string parameter affect BH attributes such as quasinormal modes (QNMs) and shadow cast. To do this, we first look into the effective potential of perturbation equations for three types of perturbation fields with different spins: massless scalar field, electromagnetic field, and gravitational field. Then, using the 6th order WKB approximation, we examine quasinormal modes of the BH disturbed by the three fields and derive quasinormal frequencies. The changes of QNM versus the core density parameter and the cloud string parameter for three disturbances are explored. We also investigate how the core density and the cloud string parameters affect the photon sphere and shadow radius. Interestingly, the study shows that the influence of Dehnen type DM and cloud string increases both photon spheres and shadow radius. Finally, we employ observational data from Sgr $A{^\star}$ and $M87{^\star}$ to set limitations on the BH parameters.

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Thermodynamics and null geodesics of a Schwarzschild black hole surrounded by a Dehnen type dark matter halo

Cited by 2 publications

References 65 publications

Some new properties of black holes in the quantum Oppenheimer-Snyder model

Some new properties of black holes in the quantum Oppenheimer-Snyder model

Quasinormal modes and shadow of Schwarzschild black holes embedded in a Dehnen-type dark matter halo exhibiting a cloud of strings

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