Fractal signatures of non-Kerr spacetimes in the shadow of light-ring bifurcations
arXiv:2405.09653 · doi:10.1103/PhysRevD.110.024001
Abstract
Light-ring bifurcations that can occur for prolate non-Kerr compact objects can leave an indelible signature on SMBH shadows as a fractal sequence of eyebrow-like formations. These fractal features are the result of two properties of these spacetimes. The first is that they allow for multiple escapes for the photons (throats in the effective potential of photon geodesic motion). The second is that photon geodesics can resonate between different generalized light-rings related to the escapes, called fundamental photon orbits, that lead photons to alternate between the different exits either towards the compact object or infinity. The resulting fractal structures of the shadow seem to be a generic feature of prolate non-Kerr objects that may be observable in (accretion-disk)-illuminated compact objects, especially along equatorial lines of sight, but the best orientation depends on the specific parameters. Such fractal features if observed in the shadows of singular supermassive black holes at the centers of galaxies, would be smoking gun signals of non-Kerr compact objects.
arXiv comment17 pages, 20 figures. Accepted for publication in Physical Review D
References in corpus (88)
- 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
- Tests of general relativity with GW150914
- 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
- Testing General Relativity with Present and Future Astrophysical Observations
- First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
- First M87 Event Horizon Telescope Results. II. Array and Instrumentation
- Testing the nature of dark compact objects: a status report
- First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
- TOPICAL REVIEW: General relativistic boson stars
- Black holes, gravitational waves and fundamental physics: a roadmap
- First Sagittarius A* Event Horizon Telescope Results. VI: Testing the Black Hole Metric
- Black Hole Shadows, Photon Rings, and Lensing Rings
- 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
- Stable gravastars - an alternative to black holes?
- First Sagittarius A* Event Horizon Telescope Results. III: Imaging of the Galactic Center Supermassive Black Hole
- Testing the No-Hair Theorem with Observations in the Electromagnetic Spectrum: II. Black-Hole Images
- Light ring stability in ultra-compact objects
- A Metric for Rapidly Spinning Black Holes Suitable for Strong-Field Tests of the No-Hair Theorem
- 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
- Mapping spacetimes with LISA: inspiral of a test-body in a `quasi-Kerr' field
- General parametrization of axisymmetric black holes in metric theories of gravity
- Gravitational Condensate Stars: An Alternative to Black Holes
- The innermost stable circular orbit and shadow in the novel Einstein-Gauss-Bonnet gravity
- Regular Black Hole Metric with Three Constants of Motion
- The Shape of the Black Hole Photon Ring: A Precise Test of Strong-Field General Relativity
- New parametrization for spherically symmetric black holes in metric theories of gravity
- Fate of gravitational collapse in semiclassical gravity
- Chaotic lensing around boson stars and Kerr black holes with scalar hair
- Towards a formalism for mapping the spacetimes of massive compact objects: Bumpy black holes and their orbits
- Shadows of Kerr black holes with and without scalar hair
- Fundamental photon orbits: black hole shadows and spacetime instabilities
- Bumpy Black Holes in Alternate Theories of Gravity
- Parametrized black hole quasinormal ringdown. I. Decoupled equations for nonrotating black holes
- Kerr Black Holes are Not Unique to General Relativity
- Boson Stars from Self-Interacting Dark Matter
- Parametrized black hole quasinormal ringdown. II. Coupled equations and quadratic corrections for nonrotating black holes
- Can the EHT M87 results be used to test general relativity?
- Can different black holes cast the same shadow?
- General relativistic radiative transfer: formulation and emission from structured tori around black holes
- On generic parametrizations of spinning black-hole geometries
- Binary black hole shadows, chaotic scattering and the Cantor set
- Shadows and photon rings of regular black holes and geonic horizonless compact objects
- Fractal basins and chaotic trajectories in multi-black hole space-times
- Black hole shadow of a rotating scale--dependent black hole
- Chaos in Static Axisymmetric Spacetimes I : Vacuum Case
- Shadows of Kerr-like black holes in a modified gravity theory
- Radiation Transfer of Emission Lines in Curved Space-Time
- Black Hole Images as Tests of General Relativity: Effects of Spacetime Geometry
- Post-Kerr black hole spectroscopy
- Chaotic shadow of a non-Kerr rotating compact object with quadrupole mass moment
- Black Hole Shadow as a Test of General Relativity: Quadratic Gravity
- EHT tests of the strong-field regime of General Relativity
- Eikonal quasinormal modes of black holes beyond General Relativity
- From a locality-principle for new physics to image features of regular spinning black holes with disks
- Preserving Kerr symmetries in deformed spacetimes
- Can supermassive black hole shadows test the Kerr metric?
- Kerr black holes with synchronised Proca hair: lensing, shadows and EHT constraints
- TeraHertz Exploration and Zooming-in for Astrophysics (THEZA): ESA Voyage 2050 White Paper
- A Parametric model for the shapes of black-hole shadows in non-Kerr spacetimes
- Asymptotically flat, parameterized black hole metric preserving Kerr symmetries
- Distinguishing gravitational and emission physics in black-hole imaging: spherical symmetry
- Black Hole Images as Tests of General Relativity: Effects of Plasma Physics
- Orbits in a non-Kerr Dynamical System
- Eikonal quasinormal modes of black holes beyond general relativity III: scalar Gauss-Bonnet gravity
- Eikonal quasinormal modes of black holes beyond general relativity II: generalised scalar-tensor perturbations
- The modification of photon trapping orbits as a diagnostic of non-Kerr spacetimes
- I-Love-Q Relations: From Compact Stars to Black Holes
- Chaotic dynamics around astrophysical objects with nonisotropic stresses
- Chaotic Shadows of Black Holes: A Short Review
- How well can ultracompact bodies imitate black hole ringdowns?
- Measuring the shape of a black hole photon ring
- Shadow of a Schwarzschild black hole surrounded by a Bach-Weyl ring
- Using space-VLBI to probe gravity around Sgr A*
- Line emission from optically thick relativistic accretion tori
- Chaos in Geodesic Motion around a Black Ring
- Chaotic Motion Around Prolate Deformed Bodies
- Curious case of gravitational lensing by binary black holes: a tale of two photon spheres, new relativistic images and caustics
- Revised research about chaotic dynamics in Manko et al. spacetime
- Is a black hole shadow a reliable test of the no-hair theorem?
- Recurrence plots and chaotic motion around Kerr black hole
- An overview of the escape dynamics in the Henon-Heiles Hamiltonian system
- Chaotic photon orbits and shadows of a non-Kerr object described by the Hartle-Thorne spacetime
- Slowly-rotating compact objects: the nonintegrability of Hartle-Thorne particle geodesics