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Colloquium – Sheila Kannappan
January 13, 2020 | 4:00 pm - 5:00 pm
Title: Does the Growth of Dark Matter Halos Drive the Gas Physics of Galaxies and Galaxy Groups?
Abstract: How important is the “cosmological” physics of growing dark matter halos in driving the “baryonic” physics of multiphase gas in galaxies and galaxy groups? Using data from the REsolved Spectroscopy Of a Local VolumE (RESOLVE) survey and the Environmental COntext (ECO) catalog, I will argue that galaxy-scale (internal), local-scale (galaxy interaction-driven), and large-scale (cosmic structure-driven) evolution in may all be secondary to evolution driven by dark matter halo growth. In this picture, the formation of multiple-galaxy bound systems would not explain the evolving gas content in those systems; instead, the survival of multiple-galaxy bound systems as unmerged groups would be explained by the evolving gas content of their host dark matter halos.
Host: John Blondin