Neutral Hydrogen and Star Formation in the Coma-Abell1367 Supercluster

TL;DR

This study uses multi-wavelength observations to explore how spiral galaxies in the Coma-Abell1367 supercluster evolve, highlighting environmental effects on star formation and galaxy color transition.

Contribution

It provides new insights into galaxy evolution by combining HI, UV, and optical data to identify different evolutionary stages within a supercluster.

Findings

Transition galaxies are likely progeny of healthy spirals with quenched star formation.

Environmental processes in clusters influence galaxy migration from blue to red sequence.

Abstract

We present preliminary results of a multi-wavelength study focused on the evolution of spiral galaxies in the UV-optical colour-magnitude (CM) diagram. By combining HI, UV and optical observations of the Coma-Abell1367 supercluster we are able to identify galaxies at different stages of their evolution: from healthy star-forming galaxies, to blue HI-poor spirals and transition objects. Our analysis shows that galaxies in the transition region are likely to be the progeny of healthy spirals, whose star-formation has been quenched by the harsh cluster environment. This result suggests that, at least in clusters of galaxies, the migration of galaxies from the blue to the red sequence might be due to environmental processes.