Steady Outflows in Giant Clumps of High-z Disk Galaxies During Migration and Growth by Accretion

Understand

We predict the evolution of giant clumps undergoing star-driven outflows in high-z gravitationally unstable disk galaxies.

• We find that the mass loss is expected to occur through a steady wind over many tens of free-fall times (t_ff ~ 10 Myr) rather than by an explosive disruption in one or a few t_ff.
• Our analysis is based on the finding from simulations that radiation trapping is negligible because it destabilizes the wind (Krumholz & Thompson 2012, 2013).
• Each photon can therefore contribute to the wind momentum only once, so the radiative force is limited to L/c.