Events at Physics

<< Fall 2017 Spring 2018 Summer 2018 >>
Subscribe your calendar or receive email announcements of events
Astronomy Colloquium
The Positive Side of the Galactic Baryon Ledger: the Evidence for Cold Inflow
Date: Thursday, February 22nd
Time: 3:30 pm - 5:00 pm
Place: 4421 Sterling Hall, Cookies and coffee 3:30 pm , Talk starts at 3:45 pm
Speaker: Chris Howk, University of Notre Dame
Abstract: 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.
Add this event to your calendar