A strong lensing model of the galaxy cluster PSZ1 G311.65-18.48

Understand

We present a strong lensing analysis of the galaxy cluster PSZ1 G311.65-18.48 (z=0.443) using multi-band observations with Hubble Space Telescope, complemented with VLT/MUSE spectroscopic data.

• The MUSE observations provide redshift estimates for the lensed sources and help reducing the mis-identification of the multiple images.
• Spectroscopic data are also used to measure the inner velocity dispersions of 15 cluster galaxies and calibrate the scaling relations to model the subhalo cluster component.
• The model is based on 62 multiple images grouped in 17 families belonging to 4 different sources.