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Shadows of Kerr-like black holes in a modified gravity theory
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abstract
In this paper, the shadows cast by non-rotating and rotating modified gravity black holes are investigated. In addition to the black hole spin parameter $a$ and the inclination angle $\theta$ of observer, another parameter $\alpha$ measuring the deviation of gravitational constant from the Newton one is also found to affect the shape of the black hole shadow. The result shows that, for fixed values of $a/M$ and $\theta$, the size and perimeter of the shadows cast by the non-rotating and rotating black holes significantly increase with the parameter $\alpha$, while the distortions decrease with $\alpha$. Moreover, the energy emission rate of the black hole in high energy case is also investigated, and the result shows that the peak of the emission rate decreases with the parameter $\alpha$.
Forward citations
Cited by 4 Pith papers
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Schwarzschild Black Holes Immersed in Born-Infeld Magnetic Fields and Their Observational Signatures
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Spherical photon orbits around Kerr-MOG black hole
Spherical photon orbits around Kerr-MOG black holes are classified, with a critical inclination angle switching the number of orbits from four to two.
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On new regular charged black hole solutions: Limiting Curvature Condition, Quasinormal modes and Shadows
The authors introduce two new regular black hole metrics from nonlinear electrodynamics and two Limiting Curvature Condition versions, with numerical results for stability, shadows, and quasinormal modes.
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Connection Between the Shadow Radius and Quasinormal Frequencies for Black Holes in STVG with Perfect Fluid Dark Matter
In STVG with PFDM, eikonal QNM real frequencies equal multipole number over shadow radius, so shadow size and ringdown are dual photon-sphere observables.
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