A photon sphere, or photon ring or photon circle, arises in a neighbourhood of the event horizon of a black hole where gravity is so strong that emitted...

the photon sphere must have been emitted by objects between the photon sphere and the event horizon. For a Kerr black hole the radius of the photon sphere...

outer photon sphere. A beam of light traveling in the same direction as the black hole's spin will circularly orbit at the inner photon sphere. Orbiting...

test particle like a photon, the only possible but unstable circular orbit is exactly at the photon sphere. Inside the photon sphere, no circular orbits...

Photon sphere (definition): A photon sphere of a static spherically symmetric metric is a timelike hypersurface { r = r p s } {\displaystyle \{r=r_{ps}\}}...

allow the photons to fall into the photon sphere, since then they would simply fall into orbit around the black hole. The path that the photons take comes...

Other distinct types include: The Cauchy and Killing horizons. The photon spheres and ergospheres of the Kerr solution. Particle and cosmological horizons...

cached photon maps is used. The steps are: Gather the N nearest photons using the nearest neighbor search function on the photon map. Let S be the sphere that...

than 3 2 r s {\displaystyle {\tfrac {3}{2}}r_{s}} (the radius of the photon sphere). The formula for a clock at rest is given above; the formula below...

Emanuele Berti; Akihiro Ishibashi (27 September 2012). "Black-Hole Bombs and Photon-Mass Bounds". Physical Review Letters. 109 (13): 131102. arXiv:1209.0465...

The Riemann sphere has many uses in physics. In quantum mechanics, points on the complex projective line are natural values for photon polarization states...

Peter W. (17 July 2018). "Scrambling Time and Causal Structure of the Photon Sphere of a Schwarzschild Black Hole". arXiv:1807.04363 [gr-qc]. Sorkin, Rafael...

jet Gravitational singularity Ring singularity Theorems Event horizon Photon sphere Innermost stable circular orbit Ergosphere Penrose process Blandford–Znajek...

2022. Sneppen, Albert (9 July 2021). "Divergent reflections around the photon sphere of a black hole". Scientific Reports. 11 (1): 14247. Bibcode:2021NatSR...

jet Gravitational singularity Ring singularity Theorems Event horizon Photon sphere Innermost stable circular orbit Ergosphere Penrose process Blandford–Znajek...

horizon Ergosphere Killing horizon Naked singularity Particle horizon Photon sphere Reissner–Nordström solution Ivan Booth (2005). "Black hole boundaries"...

the data. Black hole information paradox Black hole thermodynamics Photon sphere Gravitational time dilation Magnetospheric eternally collapsing object...

Energy is re-emitted, not as a single photon, but rather as a series of photons of lesser energy. The photons lose energy as they travel outward from...

S2CID 119476658. Sneppen, Albert (2021-07-09). "Divergent reflections around the photon sphere of a black hole". Scientific Reports. 11 (1): 14247. Bibcode:2021NatSR...

jet Gravitational singularity Ring singularity Theorems Event horizon Photon sphere Innermost stable circular orbit Ergosphere Penrose process Blandford–Znajek...

horizon Ergosphere Killing horizon Naked singularity Particle horizon Photon sphere Reissner–Nordström solution Schwarzschild metric Hawking, S. W. & Ellis...

calculated. This number is the average number of times a photon is scattered in the sphere, before it is absorbed in the coating or escapes through a...

mass around 5.5×107 M☉, the black hole is not large enough for its photon sphere to be observed, as in EHT images of Messier M87*, but its jet extends...

jet Gravitational singularity Ring singularity Theorems Event horizon Photon sphere Innermost stable circular orbit Ergosphere Penrose process Blandford–Znajek...

ringdown phase starts when the black holes approach each other within the photon sphere. In this region most of the emitted gravitational waves go towards the...

there is a circular orbit for photons at rinner = 3⁄2 rs. The sphere of this radius is sometimes known as the photon sphere. The orbital precession rate...

to mimic a black hole of Schwarzschild form. Similar properties of photon sphere were also found numerically for the metamaterial black hole. Several...

jet Gravitational singularity Ring singularity Theorems Event horizon Photon sphere Innermost stable circular orbit Ergosphere Penrose process Blandford–Znajek...

there is a circular orbit for photons at rinner = ⁠3/2⁠ rs. The sphere of this radius is sometimes known as the photon sphere. The orbital precession rate...

field or in terms of the momenta of photons, particles of light. The interaction of electromagnetic waves or photons with matter may involve an exchange...