Abstract
We investigate the influence of the cosmological constant, Λ, on the bending of light by a charged black hole in a de Sitter spacetime. Despite vanishing of the cosmological constant in the second order null geodesic equation, considering the method introduced by Rindler and Ishak (2007), we obtain an expression for the deflection angle, consistent with previous results for Schwarzschild, Schwarzschild-de Sitter (SdS), and Reissner-Nordstrom (RN) spacetimes.
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Heydari-Fard, M., Mojahed, S. & Rokni, S.Y. Light bending in Reissner-Nordstrom-de Sitter black hole by Rindler-Ishak method. Astrophys Space Sci 351, 251–253 (2014). https://doi.org/10.1007/s10509-014-1815-0
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DOI: https://doi.org/10.1007/s10509-014-1815-0