Imperial College London

Carlo R. Contaldi

Faculty of Natural SciencesDepartment of Physics

Professor of Theoretical Physics



+44 (0)20 7594 1527c.contaldi




505Huxley BuildingSouth Kensington Campus






BibTex format

author = {Renzini, AI and Contaldi, CR and Heavens, A},
doi = {10.1103/PhysRevD.95.124047},
journal = {Physical Review D},
title = {Mapping weak lensing distortions in the Kerr metric},
url = {},
volume = {95},
year = {2017}

RIS format (EndNote, RefMan)

AB - Einstein’s theory of General Relativity implies that energy, i.e., matter, curves space-time and thusdeforms lightlike geodesics, giving rise to gravitational lensing. This phenomenon is well understood in thecase of the Schwarzschild metric and has been accurately described in the past; however, lensing in the Kerrspace-time has received less attention in the literature despite potential practical observational applications.In particular, lensing in such space is not expressible as the gradient of a scalar potential and as such is asource of curl-like signatures and an asymmetric shear pattern. In this paper, we develop a differentiablelensing map in the Kerr metric, reworking and extending previous approaches. By using standard tools ofweak gravitational lensing, we isolate and quantify the distortion that is uniquely induced by the presenceof angular momentum in the metric. We apply this framework to the distortion induced by a Kerr-likeforeground object on a distribution of background of sources. We verify that the new unique lensingsignature is orders of magnitude below current observational bounds for a range of lens configurations.
AU - Renzini,AI
AU - Contaldi,CR
AU - Heavens,A
DO - 10.1103/PhysRevD.95.124047
PY - 2017///
SN - 2470-0010
TI - Mapping weak lensing distortions in the Kerr metric
T2 - Physical Review D
UR -
UR -
UR -
VL - 95
ER -