The First Galaxies and the Likely Discovery of Their Fossils in the Local Group

Figure 3

Same as in Figure 2 except for a zoomed region of 0.125²h⁻² Mpc2 around the most massive object in the 64L05p3 simulation in RGS02b. In this time sequence of images (top: 𝑧=17.3,12.2 from left to right; bottom: 𝑧=11.3,10.2 from left to right) we recognize the two main processes that create H2 in the filaments: “positive feedback regions” in front of H II regions and the reformation of H2 inside relic H II regions. The bursting mode of the star formation is evident from the continuous formation and recombination of the H II regions in the time sequence of the slices.

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