ner_tags: O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B-Model I-Model O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B-Model I-Model O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B-Model I-Model O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B-Model I-Model I-Model I-Model O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B-Model I-Model O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
tokens: Time-averaged LW escape fractions in the near-field, averaged over the first two Myr. All values are given in per cent. The structure of the rows is given as in Table 3 . Most LW escape fractions averaged over 2Myr are high; for SFEs with a flat IMF in Halo B, this behaviour is most pronounced. The four outbreaking I-front cases show slightly reduced LW escape fractions, but only down to 97percent. This change occurs because the initial few time-steps, until an outbreak with escape fractions smaller than 100percent, now carry a slightly larger weight. For the slowly moving I-fronts, the LW escape fraction decreases (with the exception of a 0.1 SFE flat IMF in Halo A). Here, the LW escape fraction slowly increases over time as the I-front moves through the halo. These last results need to be taken as lower limits as we have to run the slowing moving I-front simulations with higher resolution, but can do so only after 1Myr (0.18Myr for the Salpeter IMF) due to the high computational costs of the required refinement technique. LW escape fractions of returning I-fronts decrease or increase depending on when the I-front first breaks out (in the case of a quiet late Kroupa IMF) and starts to return. We therefore cannot give a general trend. 4.3 LW flux-averaged escape fractions in the near-field The LW flux of the SED is decreasing over time (compare Fig. 3 ) by factors of up to 410 4 in the case of the flat IMF. We therefore provide the LW escape fraction weighted by the LW flux emitted by the stellar source rather than averaged over time. We list these values in Table 5 and show them in Fig. 10 . Except for an SFE of 0.1percent, the escape fraction is always larger than 75percent. The difference to the time-averaged LW escape fraction from Section 3.2 is most significant for the flat IMF, as in that case, the LW escape fraction drops when the LW flux drops and the overall contribution is small. Additional shielding by atomic hydrogen does not decrease the LW escape fraction in this limit by more than 0.5percent. Therefore, we only provide the escape fraction obtained by considering both H 2 and H shielding together. Figure 10. Flux-averaged LW escape fractions in the near-field for our parameter space. Different SEDs are shown by different symbols, Halo A is colour-coded in light blue, and Halo B is colour-coded in black. Table 5. LW flux-averaged LW escape fractions in the near-field, averaged over the total LW flux of the simulation. All values are given in per cent. The upper three rows refer to Halo A, and the lower three rows refer to Halo B. Shielding by H 2 only and by the combination of H and H 2 yields the same results. 4.4 Time-averaged escape fractions in the far-field In the far-field, the LW escape fractions are generally larger than in the near-field, varying from 59percent to 100percent. Our values are listed in Table 6 . Including shielding by neutral hydrogen can reduce the LW escape fraction by up to 29percent (comparing