CfA OIR Division Lunch Talks
Friday, December 10, 2010, Noon, Phillips Auditorium

Gas in the Vicinity of Star-Forming Galaxies at z~2-2.5
Olivera Rakic (Leiden)

We study the intergalactic medium around star-forming galaxies by analyzing high resolution spectra of 15 QSOs with ~700 foreground galaxies with spectroscopic redshifts at z~2-2.5, using pixel optical depth techniques. All the galaxies are within 2 Mpc (proper) from the lines of sight to the QSOs. We measure the distribution of HI, CIV, and OVI absorption as a function of separation from galaxies and of galaxy properties. We find many strong correlations that give us insight into the physical state of the intergalactic medium in the vicinity of starburst galaxies. Finally, we compare our findings with the results from the cosmological smoothed particle hydrodynamics simulations (OWLS).