Feb 22, 2018

Chris Howk, Univeristy of Notre Dame

"The Positive Side of the Galactic Baryon Ledger: the Evidence for Cold Inflow"

The flow of gas through galactic halos is crucial to the evolution of galaxies, as the nature of such flows can dictate the star formation properties of galaxies and regulate their metallicity.  Outflows through the circumgalactic medium (CGM) carry metals away from galaxies (although many may return), while infalling metal-poor gas from the intergalactic medium dilutes the metals in galaxies and provides new fuel for star formation.  The nature of the infalling baryons, in particular, is of great interest, but such gas has historically been difficult to identify.  I'll review our work on galaxies both near and far that suggests the inflow of new matter is robust even in today's massive galaxies.

Event Details

Feb 22, 2018


4421 Sterling Hall

Coffee served at 3:30pm; talk starts at 3:45pm

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