Shadow of black hole surrounded by magnetized plasma: Axion-plasmon cloud

Abstract

By exploiting the extreme environment of the black hole (BH) as a potential place for axion-photon interaction, we use an axion-producing model of the magnetized plasma to study the shadow of an asymptotically flat rotating BH immersed into an axion-plasmon cloud. By aiming to reveal footprints of axion in the dark shadow of BH, we in this paper explore the influence of the fixed axion-plasmon background on the motion of incident photons around the rotating BH. Under some free parameter settings, we find that axion-plasmon cloud around rotating BH affects the shape and size of the shadow in such a way that its role is distinguishable from non-magnetized plasma and standard vacuum solutions. By being limited to high rotation BH, we show that the size of the BH shadow increases as the axion-plasmon coupling gets strong. Interestingly, our analysis indicates that as the mass of axion gets heavier, it can leave a subtle imprint of itself on the shadow. Conversely, in the non-rotating limit (Schwarzschild), by recovering the spherical symmetry of the shadow shape of BH, its size decreases. In coordination with the trend of change in shadow size, the investigation of the energy emission from the BH surrounded by the magnetized plasma shows that the maximal energy emission rate from the rotating BH in the presence of axion-plasmon cloud increases compared to the non-magnetized plasma and the vacuum solutions. Subsequently, by relaxing the rotation, the axion-plasmon cloud causes a decrease in the energy emission rate from the BH.

23 pages, 15 figures, for publication in " Nuclear Physics B"

References in corpus (23)

• 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. V. Physical Origin of the Asymmetric Ring
• First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon
• First Sagittarius A* Event Horizon Telescope Results. III: Imaging of the Galactic Center Supermassive Black Hole
• Ultra Light Boson Dark Matter and Event Horizon Telescope Observations of M87*
• Frequency-dependent effects of gravitational lensing within plasma
• Gravitational Lensing in presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow
• Superradiance evolution of black hole shadows revisited
• Testing Rotating Regular Metrics as Candidates for Astrophysical Black Holes
• Substructure of fuzzy dark matter haloes
• The Polarized Image of a Synchrotron Emitting Ring of Gas Orbiting a Black Hole
• Axion-plasmon or magnetized plasma effect on an observable shadow and gravitational lensing of a Schwarzschild black hole
• Shadows and lensing of black holes immersed in strong magnetic fields
• Constraints on Barrow entropy from M87* and S2 star observations
• Constraining the tidal charge of brane black holes using their shadows
• Fifty years of energy extraction from rotating black hole: revisiting magnetic Penrose process
• Revisiting longitudinal plasmon-axion conversion in external magnetic fields
• On null geodesics and shadow of hairy black holes in Einstein-Maxwell-dilaton gravity
• Escape and Trapping of Low-Frequency Gravitationally Lensed Rays by Compact Objects within Plasma
• Axions and "Light Shining Through a Wall": A Detailed Theoretical Analysis
• Axion as a cold dark matter candidate: Proof to fully nonlinear order

Cited by in corpus (16)

• Thermodynamics and Shadows of GUP-corrected Black Holes with Topological Defects in Bumblebee Gravity
• Black hole surrounded by the pseudo-isothermal dark matter halo
• Exploring antisymmetric tensor effects on black hole shadows and quasinormal frequencies
• Shadow and greybody bounding of a regular scale-dependent black hole solution
• Nonlinearly charged black holes: Shadow and Thin-accretion disk
• Homoclinic orbit and the violation of the chaos bound around a black hole with anisotropic matter fields
• Quasinormal Modes and Optical Properties of 4-D black holes in Einstein Power-Yang-Mills Gravity
• Harvesting energy driven by Comisso-Asenjo process from Kerr-MOG black holes
• Rotating Black Hole in Kalb-Ramond Gravity: Constraining Parameters by Comparison with EHT Observations of Sgr A* and M87*
• Shadow of quantum extended Kruskal black hole and its super-radiance property
• Superradiant energy extraction from rotating hairy Horndeski black holes
• Deflection angle, quasinormal modes and optical properties of a de Sitter black hole in $f(\mathcal{T},\mathcal{B})$ gravity
• Shadows aspect of rotating black holes in the Einstein-AdS SU(N)-nonlinear sigma model
• Topological dyonic black holes of massive gravity with generalized quasitopological electromagnetism
• Shadows of a Non-Commutative Black Hole under the Influence of a Magnetized Plasma
• Optical effects in unmagnetized cold plasmas by a chiral axion factor