Cheshire Cat six-layer lens model

Previously, I made several 5-layer lens model, two layers represent the Group-scale halos, another two represent the two dominant elliptical galaxies, the last layer represent the remaining member galaxies.

Here the six-layer model follow similar logic, the extra 6th layer represent the intracluster gas shocked by the merger.

This component is represented by Sersic profile as recommended by Sandor.

Following image is the mass contour of the Cheshire Cat in this six-layer model. The 6th layer component representing the gas is shown in the small yellow contour lower right of "4.514". Contour levels are in unit of 10^15 solar masses per Mpc^2.

For comparison, the 5-layer lens model mass contour is shown below.

There is a difference of mass distribution around midway between the two dominant elliptical galaxies due to extra mass component.

It is important to note that the delens-relens result in both of these two lens models are near identical. Both of them are self-consistent. This is mostly due to the lack of lensing constrains between two elliptical galaxies.