Silhouette and spectral line profiles in the special modification of the Kerr black hole geometry generated by quintessential fields

Abstract

We study optical effects in quintessential Kerr black hole spacetimes corresponding to the limiting case of the equation-of-state parameter ${\omega }_q=-1/3$ of the quintessence. In dependence on the dimensionless quintessential field parameter $c$, we determine the black hole silhouette and the spectral line profiles of Keplerian disks generated in this special quintessential Kerr geometry, representing an extension of the general modifications of the Kerr geometry introduced recently by Ghasemi-Nodehi and Bambi \cite{Gha-Bam:2016:EPJC:}. We demonstrate that due to the influence of the parameter $c$, the silhouette is almost homogeneously enlarged, and the spectral line profiles are redshifted with almost conserved shape.

References in corpus (20)

• Quantum Gravity at a Lifshitz Point
• Rotating regular black holes
• Generating rotating regular black hole solutions without complexification
• A Metric for Rapidly Spinning Black Holes Suitable for Strong-Field Tests of the No-Hair Theorem
• Rotating Regular Black Hole Solution
• Solar system effects in Schwarzschild--de Sitter spacetime
• Brane-world stars with solid crust and vacuum exterior
• Influence of the relict cosmological constant on accretion discs
• Profiles of emission lines generated by rings orbiting braneworld Kerr black holes
• Circular geodesics of Bardeen and Ayon-Beato-Garcia regular black-hole and no-horizon spacetimes
• Equatorial circular orbits in the Kerr-de Sitter spacetimes
• Precise analytic treatment of Kerr and Kerr-(anti) de Sitter black holes as gravitational lenses
• Periapsis and gravitomagnetic precessions of stellar orbits in Kerr and Kerr-de Sitter black hole spacetimes
• Iron K$\alpha$ line of Kerr black holes with scalar hair
• Quasiperiodic oscillations in a strong gravitational field around neutron stars testing braneworld models
• Accretion disks around black holes in modified strong gravity
• Pseudo-Newtonian gravitational potential for Schwarzschild-de Sitter spacetimes
• Using iron line reverberation and spectroscopy to distinguish Kerr and non-Kerr black holes
• Testing the Kerr metric with the iron line and the KRZ parametrization
• Constraining the Cardoso-Pani-Rico metric with future observations of SgrA${}^{\ast }$

Cited by in corpus (8)

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• Integrability of Kerr-Newman spacetime with cloud strings, quintessence and electromagnetic field
• On new regular charged black hole solutions: Limiting Curvature Condition, Quasinormal modes and Shadows
• Geodesic analysis and black hole shadows on a general non--extremal rotating black hole in five--dimensional gauged supergravity
• Black holes with a fluid of strings
• Iron line reverberation mapping in Ghasemi-Nodehi-Bambi background