Analytic derivation of photon ring geometry, redshift, and travel time for a Schwarzschild black hole in an inhomogeneous pressureless plasma, with comparisons to vacuum and homogeneous plasma cases.
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In a pion condensate, photons behave as massive particles and gravitational lensing gains a hadronic correction; the paper derives the modified ray equations and the deflection formula for a pionic-vortex black hole.
An effective Gauss-Bonnet-like deformation of the Kerr-Newman metric moves the ISCO inward, raises radiative efficiency, flux, and temperature, while charge suppresses these quantities.
citing papers explorer
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Gravitational Lensing in the Schwarzschild Spacetime: Photon Rings in Vacuum and in the Presence of a Plasma
Analytic derivation of photon ring geometry, redshift, and travel time for a Schwarzschild black hole in an inhomogeneous pressureless plasma, with comparisons to vacuum and homogeneous plasma cases.
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Hadronic lensing
In a pion condensate, photons behave as massive particles and gravitational lensing gains a hadronic correction; the paper derives the modified ray equations and the deflection formula for a pionic-vortex black hole.
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Thin Accretion Disks around Rotating Charged Black Holes in an Effective Higher-Curvature Spacetime
An effective Gauss-Bonnet-like deformation of the Kerr-Newman metric moves the ISCO inward, raises radiative efficiency, flux, and temperature, while charge suppresses these quantities.