Details

Autor(en) / Beteiligte

• Piattella, Oliver F.

Titel

Lensing in the McVittie metric

Ist Teil von

• Physical review. D, 2016-01, Vol.93 (2), Article 024020

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We investigate the effect of the cosmological expansion on the bending of light due to an isolated pointlike mass. We adopt the McVittie metric as the model for the geometry of the lens. Assuming a constant Hubble factor, we find an analytic expression involving the bending angle, which turns out to be increased by a contribution 1+z sub(L), where z sub(L) is the redshift of the lens. Employing the lens equation in the thin lens approximation, we find that for Einstein ring systems, the lens mass estimation gains a correction (1+z sub(S))/(1+ z sub(L)) with respect to the one based on the usual formula