When source variability is comparable to Kerr geodesic delay spreads, high-inclination fast- and slow-light curves can differ by tens of percent; brisk light retains leading lensing timing more cheaply.
On the Observable Shape of Black Hole Photon Rings
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Bardeen's definition of black hole critical curves deviates from de Vries and Grenzebach definitions in homogeneous plasma by contracting with increasing density, contrary to prior expectations.
Kerr-BR black hole images with magnetically coupled synchrotron emissivity show spin- and B-dependent shifts in the inner disk edge, altered lensing rings, and Doppler asymmetries, with retrograde cases displaying wider central depletion.
citing papers explorer
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Light Propagation Prescriptions for Black Hole Movies
When source variability is comparable to Kerr geodesic delay spreads, high-inclination fast- and slow-light curves can differ by tens of percent; brisk light retains leading lensing timing more cheaply.
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A note on methods for computing the critical curve of Kerr-like black holes
Bardeen's definition of black hole critical curves deviates from de Vries and Grenzebach definitions in homogeneous plasma by contracting with increasing density, contrary to prior expectations.
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Optical Appearance of the Kerr-Bertotti-Robinson Black Hole with a Magnetically Driven Synchrotron Emissivity Model
Kerr-BR black hole images with magnetically coupled synchrotron emissivity show spin- and B-dependent shifts in the inner disk edge, altered lensing rings, and Doppler asymmetries, with retrograde cases displaying wider central depletion.