improvement on Cheshire Cat lens model

All previous lens model constructed by me does not has a intracluster gas component. Here I attempted to add an extra layer on the existing 5-layer lens model.

This extra layer is modelled by Sersic profile as suggested by Sandor, the optimised mass is about one-tenth of the individual dark matter halo. This extra component is placed at the midway between two dominant elliptical galaxies and allowed to find the best location near it.

Here's the mass distribution:

Compare to the 5-layer model:

As can be seen, the new lens model has an extra component midway between two dominant elliptical galaxies.

There is an obvious improvement in the delens-relens result of lensed system G

New model for G1

Old model for G1

As can be seen, the reproduced length of G2 resemble more closely to the data in the new model.

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New model for G2

Old Model for G2

Also, the length of relensed G2 is more reasonable in the delens-relens of G2.

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Same story for G3.

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There's no major change in the other delens-relens result.