Galaxy-scale strong gravitational lensing sample

We explore the constraining power on cosmological parameters and the effect of the lens mass model in this method with 161 galaxy-scale strong lensing systems, which is currently the largest sample with both high-resolution imaging and stellar dynamical data.

We assume a power-law mass model for the lenses, and consider three different parametrizations for {gamma} (i.e. the slope of the total mass density profile) to include the effect of the dependence of {gamma} on redshift and surface mass density. When treating {delta} (i.e. the slope of the luminosity density profile) as a universal parameter for all lens galaxies, we find the limits on the cosmological parameter {Omega}_m_ are quite weak and biased, and also heavily dependent on the lens mass model in the scenarios of parametrizing {gamma} with three different forms.