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- W1982019941 abstract "A short formula is suggested which approximates photon trajectories in the Schwarzschild field better than other simple prescriptions from the literature. We compare it with various low-order competitors, namely with those following from exact formulas for small $M$, with one of the results based on pseudo-Newtonian potentials, with a suitably adjusted hyperbola, and with the effective and often employed approximation by Beloborodov. Our main concern is the shape of the photon trajectories at finite radii, yet asymptotic behaviour is also discussed, important for lensing. An example is attached indicating that the newly suggested approximation is usable--and very accurate--for practically solving the ray-deflection exercise." @default.
- W1982019941 created "2016-06-24" @default.
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- W1982019941 date "2015-02-10" @default.
- W1982019941 modified "2023-09-26" @default.
- W1982019941 title "APPROXIMATING LIGHT RAYS IN THE SCHWARZSCHILD FIELD" @default.
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