Analyzing the Influence of Geometrical Deformation on Photon Sphere and Shadow Radius: A New Analytical Approach -Stationary, and Axisymmetric Spacetime
arXiv:2405.05077 · doi:10.1142/S0219887825400018
Abstract
Black hole shadows and photon spheres offer valuable tools for investigating black hole properties. Recent observations by the Event Horizon Telescope Collaboration have confirmed the existence of rotating black holes. Black hole parameters influence the observed shadow size. This paper explores the impact of geometrical deformations on black hole shadow size using gravitational decoupling applied to axially-symmetric spacetime. We find the results are more complex than the spherically-symmetric case. We compare shadows in well-known models with those of an Kerr black hole. Our approach suggests that the influence of an accretion disc on the observed shadow shape can be accurately described despite negligible impact on the black hole geometry itself.
arXiv comment9 pages, 10 figures. arXiv admin note: text overlap with arXiv:2404.04046
References in corpus (57)
- 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
- Schwarzschild black hole lensing
- Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A
- Calculating black hole shadows: Review of analytical studies
- The geometry of photon surfaces
- Decoupling gravitational sources in general relativity: from perfect to anisotropic fluids
- Time delay and magnification centroid due to gravitational lensing by black holes and naked singularities
- Influence of a plasma on the shadow of a spherically symmetric black hole
- A new method for shadow calculations: application to parameterised axisymmetric black holes
- Decoupling gravitational sources in general relativity: the extended case
- Shadows of spherically symmetric black holes and naked singularities
- Nonlinear electrodynamics effects on the black hole shadow, deflection angle, quasinormal modes and greybody factors
- Black hole shadow in an asymptotically-flat, stationary, and axisymmetric spacetime: The Kerr-Newman and rotating regular black holes
- Photon Rings around Kerr and Kerr-like Black Holes
- A coordinate-independent characterization of a black hole shadow
- Black holes by gravitational decoupling
- Constraining the spin and the deformation parameters from the black hole shadow
- Black hole shadow in an expanding universe with a cosmological constant
- Hairy black holes by gravitational decoupling
- Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes
- Concerns regarding the use of black hole shadows as standard rulers
- Gravitational decoupling for axially symmetric systems and rotating black holes
- Distortions of images of Schwarzschild lensing
- Strong gravitational lensing and shadow constraint from M87* of slowly rotating Kerr-like black hole
- Understanding photon sphere and black hole shadow in dynamically evolving spacetimes
- Unstable circular null geodesics of static spherically symmetric black holes, Regge poles and quasinormal frequencies
- Cosmological constant corrections to the photon sphere and black hole shadow radii
- Spherical null geodesics of rotating Kerr black holes
- Black hole shadow as a standard ruler in cosmology
- On the Size of a Black Hole: The Schwarzschild is the Biggest
- Uniqueness of photon spheres in electro-vacuum spacetimes
- On the Size of Rotating Black Holes
- Regular hairy black holes through Minkowski deformation
- Constraints on a tidal charge of the supermassive black hole in M87* with the EHT observations in April 2017
- Shape of higher-order images of equatorial emission rings around a Schwarzschild black hole: Analytical description with polar curves
- Rotating hairy black holes and thermodynamics from gravitational decoupling
- Slowly rotating black holes in Einsteinian cubic gravity
- Deflection of light rays by spherically symmetric black hole in dispersive medium
- First analytical calculation of black hole shadow in McVittie metric
- Conservation of distortion of gravitationally lensed images
- Hairy Black Holes: Non-existence of Short Hairs and Bound on Light Ring Size
- Photon sphere and shadow of a time-dependent black hole described by a Vaidya metric
- Metamorphoses of a photon sphere
- Dynamical photon sphere and time evolving shadow around black holes with temporal accretion
- Curvatures, Photon Spheres and Black Hole Shadows
- Lux in obscuro: Photon Orbits of Extremal Black Holes Revisited
- Hairy Kiselev Black Hole Solutions
- Constraining spherically symmetric metrics by the gap between photon rings
- Lower bound on the radii of black-hole photonspheres
- Analyzing the Influence of Geometrical Deformation on Photon Sphere and Shadow Radius: A New Analytical Approach -- Spherically Symmetric Spacetimes
- Vaidya and generalized Vaidya solutions by gravitational decoupling
- Traversable Wormholes in Minimally Geometrical Deformed Trace-Free Gravity using Gravitational Decoupling
- Dynamical Photon Spheres in Charged Black Holes and Naked Singularities
- Black hole shadow and acceleration bounds for spherically symmetric spacetimes
- Constraining Self-interacting Scalar Field Dark Matter From the Black Hole Shadow of the Event Horizon Telescope
- Spins of supermassive black holes M87* and SgrA* revealed from the size of dark spots in Event Horizon Telescope Images