Search Publications

QSOs sigposting cluster size halos as gravitational lenses: halo mass, projected mass density profile and concentration at z~0.7

Bonavera, L.; González-Nuevo, J.; Negrello, M. +6 more

Magnification bias is a gravitational lensing effect that is normally overlooked because it is considered sub-optimal in comparison with the lensing shear. Thanks to the demonstrated optimal characteristics of the sub-millimetre galaxies (SMGs) for lensing analysis, in this work we were able to measure the magnification bias produced by a sample o…

H-ATLAS/GAMA: magnification bias tomography. Astrophysical constraints above ~1 arcmin

Ivison, R. J.; Bonavera, L.; Danese, L. +14 more

An unambiguous manifestation of the magnification bias is the cross-correlation between two source samples with non-overlapping redshift distributions. In this work we measure and study the cross-correlation signal between a foreground sample of GAMA galaxies with spectroscopic redshifts in the range 0.2<z<0.8, and a background sample of H-A…