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Galaxy Evolution in Dense Environments

Physics/Astro Auditorium

Laura Parker (McMaster University)

February 14 @ 4:00 PM - 5:00 PM

Over time star-forming galaxies transform into passively-evolving red galaxies. These transformations are due to a combination of internal processes, like the presence of a bar or active galactic nucleus, as well as environmental processes. I will review the ways in which host environment can affect the properties of galaxies and then present some of our recent work on group and cluster galaxies in the local universe. Previous work has found that the properties of satellite galaxies depend on the mass of their host halo. We explore how galaxy star formation rates and morphologies depend on the evolutionary state of their host environment as traced by both dynamics and X-ray richness. It is only with large samples of well-studied galaxies in the local universe that these subtle environmental effects can be measured.  I will discuss how these trends can be used to constrain the mechanisms at play in environmentally-driven galaxy evolution.