Insights from spectral stacking on the HI content of cluster galaxies in various environments

Abstract

colour, and morphology change across the different local environments and substructure within the cluster. I find that late-type cluster galaxies located in substructures contain on average more H i than the late-type cluster galaxies not in substructures. I postulate that this suggests that the group environment protects the late-type galaxies from gas stripping mechanisms dominant in the global cluster environment. The H i stacking analysis shows that while Abell 2626 is not as H i deficient as the more massive Coma cluster, the Abell 2626 cluster galaxies do show a radial trend in the H i deficiencies as is observed in other clusters.