Influence of a plasma on the observational signature of a high-spin Kerr black hole
arXiv:1903.04382 · doi:10.1103/PhysRevD.99.084050
Abstract
To approach a more reliable observational signature of a high-spin Kerr black hole, one should take into account the effects of its surroundings. To this end we study in this paper the influence of a surrounding plasma. We consider its refractive and dispersive effects on photon trajectories and ignore the gravitational effects of plasma particles as well as the absorption or scattering processes of photons. With two specific plasma models, we obtain analytical formulae for the black hole shadow and for the observational quantities of an orbiting "hot spot" seen by an observer located far away from the black hole. We find that the plasma has a frequency-dependent dispersive effect on the size and shape of the black hole shadow and on the image position and redshift of the hot spot. These results may be tested by the Event Horizon Telescope in the future.
16 pages, 3 figures. Revised in response to referee's comments, references added. Accepted for publication in PRD
References in corpus (6)
- GW170608: Observation of a 19-solar-mass Binary Black Hole Coalescence
- Frequency-dependent effects of gravitational lensing within plasma
- Gravitational Lensing in presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow
- Gravitational lensing in a non-uniform plasma
- Photon Emission Near Extreme Kerr Black Holes
- Imaging black holes: past, present and future
Cited by in corpus (45)
- Calculating black hole shadows: Review of analytical studies
- Influence of Quantum Correction on the Black Hole Shadows, Photon Rings and Lensing Rings
- QED Effect on Black Hole Shadow
- Shadow analysis for rotating black holes in the presence of plasma for an expanding universe
- Higher order corrections to deflection angle of massive particles and light rays in plasma media for stationary spacetimes using the Gauss-Bonnet theorem
- Shadow and weak gravitational lensing of a rotating regular black hole in a non-minimally coupled Einstein-Yang-Mills theory in the presence of plasma
- Revisiting the shadow of braneworld black holes
- Analytical study of higher-order ring images of accretion disk around black hole
- Shadows of the accelerating black holes
- Shadows and negative precession in non-Kerr spacetime
- Thermal Image and Phase Transitions of Charged AdS Black Holes using Shadow Analysis
- Shadow of nulllike and timelike naked singularities without photon spheres
- Shape of higher-order images of equatorial emission rings around a Schwarzschild black hole: Analytical description with polar curves
- Deflection of light rays by spherically symmetric black hole in dispersive medium
- Light rings and long-lived modes in quasi-black hole spacetimes
- Observational signature of a near-extremal Kerr-Sen black hole in the heterotic string theory
- Shadows of Kerr black holes with a Gaussian-distributed plasma in the polar direction
- Perihelion Precession and Shadows near Blackholes and Naked Singularities
- Shadow of a charged black hole with scalar hair
- Hills and holes in the microlensing light curve due to plasma environment around gravitational lens
- Strong deflection limit analysis of black hole lensing in inhomogeneous plasma
- Gravitational effect of plasma particles on the shadow of Schwarzschild black holes
- Shadows of rotating Einstein-Maxwell-dilaton black holes surrounded by a plasma
- Deflection angle evolution with plasma medium and without plasma medium in a parameterized black hole
- The shadows of accelerating Kerr-Newman black hole and constraints from M87*
- Ruppeiner Geometry of the RN-AdS Black Hole Using Shadow Formalism
- Shadow thermodynamics of the Hayward-AdS black hole
- Shadow and weak deflection angle of a black hole in nonlocal gravity
- Time delay induced by plasma in strong lens systems
- Photon Emission Near Myers-Perry Black Holes in the Large Dimension Limit
- Photon emissions from near-horizon extremal and near-extremal Kerr equatorial emitters
- High spin expansion for null geodesics
- Observability of Zero-angular-momentum Sources Near Kerr Black Holes
- Deflection of light rays in a moving medium around a spherically symmetric gravitating object
- Observational signatures of Rotating compact objects in Plasma space-time
- Shadow of axisymmetric, stationary and asymptotically flat black holes in the presence of plasma
- Light propagation around a Kerr-like black hole immersed in an inhomogeneous anisotropic plasma in Rastall gravity: Analytical solutions to the equations of motion
- Shadow of black holes with a plasma environment in 4D Einstein-Gauss-Bonnet gravity
- Deciphering signatures of Kerr-Sen black holes in presence of plasma from the Event Horizon Telescope data
- Shadows cast by a class of rotating black bounces with an anisotropic fluid
- QED Effects on Kerr Black Hole Shadows immersed in uniform magnetic fields
- Redshift Spectroscopy as a Probe of Regular Black Holes, Black Bounces, and Scalar-Hair Compact Objects
- Visible shapes of black holes M87* and SgrA*
- Investigating the interplay of the braneworld gravity and the plasma environment on the black hole shadow
- Light deflection in axially symmetric stationary spacetimes filled with a moving medium