Shadows of rotating Einstein-Maxwell-dilaton black holes surrounded by a plasma

Abstract

We consider rotating charged black holes with a scalar dilaton field and surrounded by plasma, with the purpose of studying their shadows. The corresponding metric has been previously obtained in the literature from the static solution by using the Newman-Janis algorithm. Assuming a well known form for the pressureless and nonmagnetized plasma distribution, which is suitable for the separation of the Hamilton-Jacobi equation for light, we derive an expression that determines the shape of the shadow. We present some examples of contours and we analyze their observable properties as functions of the charge and the dilaton coupling. We find that the presence of plasma introduces a dependency on the frequency, with the shadow becoming smaller as the frequency decreases.

arXiv comment14 pages, 5 figures; v2: improved and extended version, new references added

References in corpus (82)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
• First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
• Viewing the Shadow of the Black Hole at the Galactic Center
• First M87 Event Horizon Telescope Results. II. Array and Instrumentation
• First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
• First Sagittarius A* Event Horizon Telescope Results. VI: Testing the Black Hole Metric
• Calculating black hole shadows: Review of analytical studies
• Shadows and strong gravitational lensing: a brief review
• First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole
• Shadows of Kerr black holes with scalar hair
• Rotating Charged Black Hole Solution in Heterotic String Theory
• Measurement of the Kerr Spin Parameter by Observation of a Compact Object's Shadow
• First Sagittarius A* Event Horizon Telescope Results. III: Imaging of the Galactic Center Supermassive Black Hole
• Influence of a plasma on the shadow of a spherically symmetric black hole
• Generating rotating regular black hole solutions without complexification
• First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multi-wavelength Observations, Data Processing, and Calibration
• First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass
• Hunting for extra dimensions in the shadow of M87*
• Gravitational Test Beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
• A new method for shadow calculations: application to parameterised axisymmetric black holes
• Shadow of a rotating braneworld black hole
• Null geodesics and shadow of a rotating black hole in extended Chern-Simons modified gravity
• Black holes with scalar hair in light of the Event Horizon Telescope
• Black hole shadow in an asymptotically-flat, stationary, and axisymmetric spacetime: The Kerr-Newman and rotating regular black holes
• Shadow of a Kaluza-Klein rotating dilaton black hole
• The Shape of the Black Hole Photon Ring: A Precise Test of Strong-Field General Relativity
• A coordinate-independent characterization of a black hole shadow
• Black Hole Parameter Estimation from Its Shadow
• Constraining the spin and the deformation parameters from the black hole shadow
• Silhouette of M87*: A new window to peek into the world of hidden dimensions
• Rotating Dilaton Black Holes
• Light propagation in a plasma on Kerr spacetime: Separation of the Hamilton-Jacobi equation and calculation of the shadow
• Black hole shadow in a general rotating spacetime obtained through Newman-Janis algorithm
• Shadow of a Spinning Black Hole in an Expanding Universe
• Constraints on a charge in the Reissner--Nordström metric for the black hole at the Galactic Center
• Hidden symmetries, null geodesics, and photon capture in the Sen black hole
• From static to rotating to conformal static solutions: Rotating imperfect fluid wormholes with(out) electric or magnetic field
• Gravitational Lensing in presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow
• Superradiance evolution of black hole shadows revisited
• Rotating Black Hole Shadow in Perfect Fluid Dark Matter
• Can the EHT M87 results be used to test general relativity?
• No-Hair Theorem in the Wake of Event Horizon Telescope
• Shadow analysis for rotating black holes in the presence of plasma for an expanding universe
• Shadow cast by rotating braneworld black holes with a cosmological constant
• Analytical calculation of black hole spin using deformation of the shadow
• Optical properties of Kerr-Newman spacetime in the presence of plasma
• Shadows of 5D Black Holes from String Theory
• Shadows of parametrized axially symmetric black holes allowing for separation of variables
• Simulations of imaging the event horizon of Sagittarius A* from space
• Shadow and quasinormal modes of the Kerr-Newman-Kiselev-Letelier black hole
• Applicability of the Newman-Janis Algorithm to Black Hole Solutions of Modified Gravity Theories
• EHT tests of the strong-field regime of General Relativity
• Revisiting the shadow of a black hole in the presence of a plasma
• Influence of a plasma on the observational signature of a high-spin Kerr black hole
• Black hole shadow as a standard ruler in cosmology
• Constraining the tidal charge of brane black holes using their shadows
• Photon regions, shadow observables and constraints from M87* of a charged rotating black hole
• Kerr black holes with synchronised Proca hair: lensing, shadows and EHT constraints
• On null geodesics and shadow of hairy black holes in Einstein-Maxwell-dilaton gravity
• Influence of an anisotropic matter field on the shadow of a rotating black hole
• Newman-Janis method and rotating dilaton-axion black hole
• Deflection of light rays by spherically symmetric black hole in dispersive medium
• Shadow cast by a rotating and nonlinear magnetic-charged black hole in perfect fluid dark matter
• Chaotic Shadows of Black Holes: A Short Review
• Shadows of Kerr black holes with a Gaussian-distributed plasma in the polar direction
• Light propagation in a plasma on an axially symmetric and stationary spacetime: Separability of the Hamilton-Jacobi equation and shadow
• Using space-VLBI to probe gravity around Sgr A*
• Analytical study of light ray trajectories in Kerr spacetime in the presence of an inhomogeneous anisotropic plasma
• Spinning black holes with a separable Hamilton-Jacobi equation from a modified Newman-Janis algorithm
• Physical interpretation of Newman-Janis rotating systems. I. A unique family of Kerr-Schild systems
• Shadows of magnetically charged rotating black holes surrounded by quintessence
• Rotating normal and phantom Einstein--Maxwell--dilaton black holes: Geodesic analysis
• Geodesic analysis and black hole shadows on a general non--extremal rotating black hole in five--dimensional gauged supergravity
• Black Hole Shadow Observations with Space-Ground Interferometers
• Physical interpretation of Newman-Janis rotating systems. II. General systems
• Rotating Dilaton Black Holes
• Shadow of a charged black hole surrounded by an anisotropic matter field
• Shadow of black holes with a plasma environment in 4D Einstein-Gauss-Bonnet gravity
• Shadow cast by a rotating black hole with anisotropic matter

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• Twisting shadows: Light rings, lensing and shadows of black holes in swirling universes
• Time delay induced by plasma in strong lens systems
• Remarks on the light ring images and the optical appearance of hairy black holes in Einstein-Maxwell-dilaton gravity
• Trajectories of photons around a rotating black hole with unusual asymptotics
• Deflection of light rays in a moving medium around a spherically symmetric gravitating object
• Optical effects in unmagnetized cold plasmas by a chiral axion factor
• 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
• 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
• Exact Dynamical Black Hole Solutions in Five or Higher Dimensions