Turbulence in the Intergalactic Medium

Understand

We study supernova-driven galactic outflows as a mechanism for injecting turbulence in the intergalactic medium (IGM) far from galaxies.

• To this aim we follow the evolution of a 10^13 Msun galaxy along its merger tree, with carefully calibrated prescriptions for star formation and wind efficiencies.
• At z~3 the majority of the bubbles around galaxies are old (ages >1Gyr), i.e.
• they contain metals expelled by their progenitors at earlier times; their filling factor increases with time reaching about 10% at z<2.