Shadows of black holes with dark matter halo

Abstract

We investigate the shadow of an exact black hole solution of Einstein's equations recently proposed by Cardoso et al., to describe a supermassive black hole immersed in a dark matter halo. We analyze and discuss the light rings and the gravitational lensing of this spacetime comparing them with an isolated Schwarzschild black hole. Using backward ray-tracing techniques, we study the shadows cast by such black hole when illuminated by a celestial sphere that emits radiation isotropically. We find that when the dark matter distribution concentrates near the event horizon of the black hole, multiple light rings emerge. In this high compactness regime, the shadows and gravitational lensing are significantly different from the Schwarzschild one. We also use the M87* and SgrA* shadow data, obtained by the Event Horizon Telescope collaboration, to constrain the parameters of the dark matter halo.

8 pages, 6 figures

References in corpus (30)

• 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
• 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
• Black Hole Shadows, Photon Rings, and Lensing Rings
• First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole
• First Sagittarius A* Event Horizon Telescope Results. III: Imaging of the Galactic Center Supermassive Black Hole
• Light ring stability in ultra-compact objects
• 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
• Shadow of a black hole surrounded by dark matter
• Constraints on black-hole charges with the 2017 EHT observations of M87*
• Black holes in galaxies: environmental impact on gravitational-wave generation and propagation
• Parameter estimation of hairy Kerr black holes from its shadow and constraints from M87*
• Chaotic lensing around boson stars and Kerr black holes with scalar hair
• Fundamental photon orbits: black hole shadows and spacetime instabilities
• Solutions of the Einstein equations for a black hole surrounded by a galactic halo
• Can different black holes cast the same shadow?
• Modelling the Sgr A* Black Hole Immersed in a Dark Matter Spike
• What does a binary black hole merger look like?
• Black holes in galactic centers: quasinormal ringing, grey-body factors and Unruh temperature
• Influence of an anisotropic matter field on the shadow of a rotating black hole
• Black holes surrounded by Einstein clusters as models of dark matter fluid
• Tidal effects of dark matter halo around a galactic black hole
• Tidal forces in dirty black hole spacetimes
• Cuspy and fractured black hole shadows in a toy model with axisymmetry

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• Superradiance of charged black holes embedded in dark matter halos
• Motion of spinning particles around black hole in a dark matter halo
• The shadows of accelerating Kerr-Newman black hole and constraints from M87*
• Modeling the black holes surrounded by a dark matter halo in the galactic center of M87
• Dynamics of null particles and shadow for general rotating black hole
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• Schwarzschild black hole surrounded by a cloud of strings in the background of perfect fluid dark matter
• Galactic black hole immersed in a dark halo with its surrounding thin accretion disk
• Probing the black holes in a dark matter halo of M87 using gravitational wave echoes
• Motion of particles around a magnetically charged Euler-Heisenberg black hole with scalar hair and the Event Horizon Telescope
• Parameter constraints from shadows of Kerr-Newman-dS black holes with cloud strings and quintessence
• Black hole in a generalized Chaplygin-Jacobi dark fluid: shadow and light deflection angle
• Charged black hole surrounded by a galactic halo in de Sitter universe
• Accreting Black Holes in Dark Matter Halos
• Modified Kerr black holes surrounded by dark matter spike
• Topological dyonic black holes of massive gravity with generalized quasitopological electromagnetism
• Testing black holes in a perfect fluid dark matter environment using quasinormal modes
• Effect of generic dark matter halo on transonic accretion onto galactic black holes
• Lensing by black holes within astrophysical environments
• Gravitational Lensing of Euler-Heisenberg Black Hole Surrounded by Perfect Fluid Dark Matter
• Onset of chaotic gravitational lensing in non-Kerr rotating black holes with quadrupole mass moment
• Two descriptions of dark matter around a black hole: photon sphere, shadow, and lensing
• Ringing Regularity: Gravitational Perturbations and Quasinormal Modes of Einasto-Supported Black Holes
• Matter environments around black holes: geodesics, light rings, and ultracompact configurations
• Exploring black holes with multiple photon spheres by interferometric signatures