Online-Colloquium: Benedetta Vulcani, INAF - Osservatorio Astronomico di Padova
Wann: Mi, 12.05.2021, 14:00 Uhr
Resolving the pre-processing of galaxies in groups and filaments with MUSE
Galaxies inhabit a wide range of environments and therefore are affected by different physical mechanisms. Spatially resolved maps combined with the knowledge of the hosting environment are very powerful to classify galaxies by physical process. I will present some breakthrough results based on the GAs Stripping Phenomena in galaxies with MUSE survey on the effects of the low density environments on galaxy evolution. I will discuss the multitude of mechanisms that can affect galaxies in isolation, groups and filaments. I will show how a single group can host galaxies undergoing many different processes, such as starvation, ram pressure stripping and gas accretion. I will also show how filaments can assist gas cooling and increase the star formation in the densest regions in the circumgalactic gas of the galaxies flowing through them. We call this process Cosmic Web enhancement. I will then also show examples of galaxy-galaxy interactions, mergers, and cosmic web stripping. I will emphasise the successes and limitations of a visual optical selection in identifying the processes that deplete galaxies of their gas content and probes the power of IFU data in pinning down the acting mechanism.
Talk in English language