Star Formation at Very Low Metallicity . II : On the Insignificance of Metal-Line Cooling During the Early Stages of Gravitational Collapse

We study the influence of low levels of metal enrichment on the cooling and collapse of ionized gas in small protogalactic halos using three-dimensional, smoothed particle hydrodynamics simulations. Our initial conditions represent protogalaxies forming within a fossil H ii region, a previously ionized H ii region which has not yet had time to cool and… CONTINUE READING