Mapping stars and gas in nearby galaxies is fundamental for understanding their growth and environment. However, many studies do not account for the faint outskirts of these galaxies. We demonstrate this issue by discussing the concept of size and ‘stellar edges’, defined as the outermost location where in situ star formation significantly drops in galaxies. We compare this definition with the...
Neutral atomic hydrogen (HI) provides the gas reservoir that fuels star formation. Environmental mechanisms in galaxy clusters alter the fate of this gas, impacting the evolution of galaxies. These range from gravitational to hydrodynamical effects, which might in turn ignite or boost internal processes such as AGN and gravitational instabilities. MeerKAT HI and radio continuum data of the...
Cold molecular gas is the penultimate gas phase in the baryonic cycle leading to star formation, and a key regulator of galaxy growth. Traced by the CO line, it is a most sensitive tracker of galaxy interactions with their environment. However, there is not a consensus on how environmental mechanisms, such as ram pressure or tidal interactions, affect the reservoirs traced by CO. To date, it...
