Phys. Rev. D 78, 023014 (2008) [6 pages]Rigorous approach to gravitational lensingReceived 8 May 2008; published 18 July 2008 We revisit a weak gravitational lensing problem by constructing a setup which describes the actual system as accurately as possible and solving the null geodesic equations. Details are given for the case of a universe driven only by a cosmological constant, Λ, which confirm the conventional results: The conventional lensing analysis is correct as it is, without any need for correction of O(Λ). We also treat the cases of the lensing in generic Friedmann-Robertson-Walker backgrounds. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.78.023014
DOI:
10.1103/PhysRevD.78.023014
PACS:
95.30.Sf, 98.62.Sb, 98.80.Es
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