Continuous image distortion in weak gravitational lensing

Details Continuous image distortion in weak gravitational lensing Continuous image distortion in weak gravitational lensing

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aps..apr.r1027k&link_type=abstract

American Physical Society, APS April Meeting 2010, February 13-16, 2010, abstract #R1.027

Astronomy and Astrophysics

Astrophysics

Scientific paper

We examine the shearing and magnification of images distorted by the weak gravitational lensing of a thick gravitational lens using a perturbation theory approach based on the optical scalar and geodesic deviation equations with no reference to lens planes. We compare the image distortion from optical scalars with the typical thin-lens image distortion for realistic, axially symmetric astrophysical lens, finding that the thin-lens approach often overestimates the ellipticity by up to 2 sigma near the lens. Application to non-symmetric lenses is discussed. )

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