Can we detect a supertranslated black hole?

Abstract

We attempt to address the question of whether standard tests of general relativity can detect the presence of a black hole carrying a supertranslation field. In this regard, we study the photon sphere of a dynamical black hole carrying a supertranslation hair. We find that the dynamics of the photon sphere is quite subtle and it may offer an opportunity to differentiate a supertranslated black hole from its bald counterpart. This represents a first step towards understanding the observational signatures of a supertranslated dynamical black hole.

8 Pages, 4 Figures, text substantially modified, new results added, to appear in Physical Review D

References in corpus (18)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive 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
• GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
• First M87 Event Horizon Telescope Results. II. Array and Instrumentation
• First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
• Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre
• Calculating black hole shadows: Review of analytical studies
• The gravitational-wave memory effect
• Chaotic lensing around boson stars and Kerr black holes with scalar hair
• Nonlinear gravitational-wave memory from binary black hole mergers
• QED Effect on Black Hole Shadow
• Understanding photon sphere and black hole shadow in dynamically evolving spacetimes
• Null boundary phase space: slicings, news and memory
• Persistent gravitational wave observables: Curve deviation in asymptotically flat spacetimes
• Inferring the gravitational wave memory for binary coalescence events
• Displacement memory effect near the horizon of black holes
• Dynamical horizons and Super-Translation transitions of the horizon

Cited by in corpus (11)

• Analytical study of gravitational lensing in Kerr-Newman black-bounce spacetime
• Dynamical photon sphere and time evolving shadow around black holes with temporal accretion
• Black Hole Shadow with Soft Hair
• The Shadow of Supertranslated Schwarzschild Black Hole
• Photon ring autocorrelations from gravitational fluctuations around a black hole
• Can the Near-Horizon Black Hole Memory be detected through Binary Inspirals?
• Conic Sections on the Sky: Shadows of Linearly Superrotated Black Holes
• Anomaly Equation of the Large U(1) Chiral Symmetry
• Gravitational memory meets astrophysical environments: exploring a new frontier through osculations
• Shaving off soft hairs and the black hole image memory effect
• A 4D asymptotically flat rotating black hole solution including supertraslation correction