Siyambonga Matshawule

MIGHTEE-HI: Possible interactions with the galaxy NGC~895

22/03/202320/03/2023 by Siyambonga Matshawule

The transformation and evolution of a galaxy is strongly influenced by interactions with its environment. Neutral hydrogen (HI) is an excellent way to trace these interactions. Here, we present HI observations of the spiral galaxy NGC~895, which was previously thought to be isolated. High-sensitivity HI observations from the MeerKAT large survey project MIGHTEE reveal possible …

An HI story of galaxies in Abell 2626 and beyond

20/03/2023 by Siyambonga Matshawule

Context: To study the effects of environment on galaxies we use HI observations of galaxies in and around the cluster A2626. The cluster can effectively be divided in three different environments: the cluster itself, a group environment in the periphery of the cluster (we call it the Swarm) and substructure in the cluster itself. We …