Precision MARS Mass Reconstruction of Abell 2744: Synergizing the Largest Strong Lensing and Densest Weak Lensing Datasets from JWST

Understand

We present a new high-resolution free-form mass model of Abell 2744, combining both weak-lensing (WL) and strong-lensing (SL) datasets from JWST.

• The SL dataset comprises 286 multiple images, presenting the most extensive SL constraint to date for a single cluster.
• The WL dataset, employing photo-$z$ selection, yields a source density of ~ 350 arcmin$^{-2}$, marking the densest WL constraint ever.
• The combined mass reconstruction enables the highest-resolution mass map of Abell 2744 within the ~ 1.8 Mpc$\times$1.8 Mpc reconstruction region to date, revealing an isosceles triangular structure with two legs of ~ 1 Mpc and a base of ~ 0.6 Mpc.