The First Galaxies and the Likely Discovery of Their Fossils in the Local Group
Figure 7
The evolution of the gas density in the core of dark halos due to cold accretion from the IGM for halos with and km s (from the top to the bottom), and corresponding to the circular velocities at the core radius (shown by the labels). The curves are assuming isothermal equation of state of the gas but the dashed portions show the parameter space in which such assumption fails because the gas cannot cool sufficiently fast as it is compressed toward the center of the halo.
