Galaxy cluster strong lensing cosmography: cosmological constraints from a sample of regular galaxy clusters

Understand

Cluster strong lensing cosmography is a promising probe of the background geometry of the Universe and several studies have emerged, thanks to the increased quality of observations using space and ground-based telescopes.

• For the first time, we use a sample of five cluster strong lenses to measure the values of cosmological parameters and combine them with those from classical probes.
• In order to assess the degeneracies and the effectiveness of strong-lensing cosmography in constraining the background geometry of the Universe, we adopt four cosmological scenarios.
• We find good constraining power on the total matter density of the Universe ($\Omega_{\rm m}$) and the equation of state of the dark energy parameter $w$.