Increasing these distances results in higher image separations for a given lensing galaxy. For about one of every 4 models, mostly the ones with , we see a secondary peak at large separation. There are no double images with separations between 4.00'' and 4.75'', but there are several images with separations larger that 4.75''. This might seem like a very small effect that could be dismissed as a statistical fluctuation, but this feature is found in many histograms, suggesting that it could actually be real. This could possibly result from a coupling between galaxies and large-scale structure.
Galaxies are predominantly responsible for multiple imaging.
But most galaxies are located inside clusters, where the density of background matter is high. This background matter might amplify the lensing effect of the galaxy, resulting in a peak at high separation angles. This issue requires further investigation. Each point corresponds to one cosmological model.