Speaker
Description
HI is an important component of the CGM/IGM gas. I will present two powerful samples from the KBSS Survey that focus on the Lya absorption and emission around z~2 star-forming galaxies. For absorption, we use the spectra of ~3000 galaxies to assemble ~200,000 foreground-background galaxy pairs. The ensemble is used to construct a 2D map of Lya absorption at 20-4000 kpc. The map suggests that outflow dominates the HI kinematics at <50 kpc, while infall and Hubble expansion dominate at >100 kpc. For emission, we obtain deep IFU observations on ~100 galaxies. We find that the Lya emission is statistically symmetric at <30 kpc, but stable angular momentum may start to establish. Lastly, I will present preliminary results on the connection between the Lya emission and host galaxy properties.
