Hello, I've used the groupcat.py file in the repository listed on the site to look at the halo catalog files for redshift z = 0.46 in TNG100-1. There are 448 files in total, and my understanding is that each of these is a separate halo in the box, with its own subhalos. But when I return the SubhaloCM for different chunks (or different files) in the halo catalog, I'm getting identical values for the center of mass. Is this normal? I feel it should not be the case.
Additionally, I'd like to know if there exists a field in the Subhalo key that will give me the total mass of a subhalo in stars only, rather than the total mass of all particles.
Just removing as the problem I had in this comment has been solved, please see the new edited OP