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Observations of Circumgalactic, Inflowing Gas with CWI

I describe observations with the Palomar Cosmic Web Imager and the newly commissioned Keck Cosmic Web Imager of the Circum-Galactic Medium (CGM). We show ubiquitous Lyman alpha emission near 2<z<3 QSOs, a significant number of systems velocity shear and angular momentum, filamentary and disklike morphology, and features expected from cold flow inspiral structures. In particular, new observations with KCWI show unambiguously both rotation and radial inflow in filamentary patterns, strong evidence for a cold-flow origin of high-z star-forming galaxies and for the deliverance of angular momentum via filamentary inflow in forming galaxies. We also provide a brief update to the planned flight of FIREBALL-2 to explore the low redshift CGM.

Cody Hall, AB 107

Christopher Martin (Caltech)

March 14, 2018
14:00 - 15:00