Average radial profiles for different internal UV field strengths and dust-to-gas ratios at z = 5.4. The upper left panel of this figure shows the temperature radial profile of the halo. The HII abundance radial profile for the halo is depicted in the upper right panel. The lower left panel shows the H₂ abundance. The HD radial profile of the halo is depicted in the lower right panel. The escape fraction of ionizing radiation is 10%.