<table><caption>**Table A.2.** Spearman correlation and values of the fit for the best IR line ratio tracing $f_{\text{esc,HII}}$ ($\rho \ge 0.3$).</caption><thead><tr><th>Line ratio</th><th>ρ</th><th>A</th><th>B</th></tr></thead><tbody><tr><td>H1_12.3684m / Si2_34.8046m</td><td>0.527</td><td>130.42</td><td>185.563</td></tr><tr><td>S4_10.5076m / LTIR500.500m</td><td>0.519</td><td>149.899</td><td>456.264</td></tr><tr><td>H1_12.3684m / Fe2_25.9811m</td><td>0.486</td><td>98.124</td><td>30.459</td></tr><tr><td>H1_12.3684m / LTIR500.500m</td><td>0.485</td><td>98.586</td><td>456.934</td></tr><tr><td>S4_10.5076m / C2_157.636m</td><td>0.482</td><td>354.963</td><td>-6.656</td></tr><tr><td>H1_12.3684m / H2_17.0300m</td><td>0.471</td><td>35.689</td><td>22.384</td></tr><tr><td>H1_12.3684m / Fe2_17.9314m</td><td>0.47</td><td>114.504</td><td>-61.946</td></tr><tr><td>O3_88.3323m / N2_121.767m<sup>(1)</sup></td><td>0.464</td><td>74.78</td><td>-163.043</td></tr><tr><td>H1_12.3684m / O1_63.1679m</td><td>0.464</td><td>672.149</td><td>1004.348</td></tr><tr><td>S4_10.5076m / Si2_34.8046m</td><td>0.464</td><td>183.689</td><td>-4.094</td></tr><tr><td>O3_88.3323m / N2_205.244m<sup>(1)</sup></td><td>0.461</td><td>70.567</td><td>-176.577</td></tr><tr><td>S4_10.5076m / H2_17.0300m</td><td>0.461</td><td>40.522</td><td>-39.822</td></tr><tr><td>H1_12.3684m / N2_121.767m</td><td>0.46</td><td>52.458</td><td>-3.56</td></tr><tr><td>H1_12.3684m / C2_157.636m</td><td>0.459</td><td>162.834</td><td>258.149</td></tr><tr><td>H1_12.3684m / N2_205.244m</td><td>0.449</td><td>50.224</td><td>-24.644</td></tr><tr><td>S3_33.4704m / N2_121.767m</td><td>0.448</td><td>88.792</td><td>-155.97</td></tr><tr><td>Ar3_21.8253m / N2_121.767m</td><td>0.447</td><td>100.214</td><td>9.157</td></tr><tr><td>H1_12.3684m / Fe3_22.9190m</td><td>0.446</td><td>115.686</td><td>29.741</td></tr><tr><td>S4_10.5076m / N2_121.767m</td><td>0.445</td><td>65.545</td><td>-110.542</td></tr><tr><td>S4_10.5076m / N2_205.244m</td><td>0.444</td><td>57.369</td><td>-108.528</td></tr><tr><td>S4_10.5076m / H2_28.2130m</td><td>0.442</td><td>26.491</td><td>-28.109</td></tr><tr><td>N3_57.3238m / N2_121.767m</td><td>0.442</td><td>122.575</td><td>-157.575</td></tr><tr><td>O4_25.8832m / H2_17.0300m</td><td>0.439</td><td>58.881</td><td>-4.892</td></tr><tr><td>O4_25.8832m / N2_205.244m</td><td>0.439</td><td>28.946</td><td>-3.069</td></tr><tr><td>Ne3_15.5509m / N2_121.767m</td><td>0.433</td><td>86.891</td><td>-156.961</td></tr><tr><td>S4_10.5076m / Ne3_15.5509m</td><td>0.433</td><td>390.741</td><td>12.354</td></tr><tr><td>Ar3_8.98898m / N2_121.767m</td><td>0.432</td><td>99.306</td><td>-104.741</td></tr><tr><td>O4_25.8832m / C2_157.636m<sup>(2)</sup></td><td>0.432</td><td>55.734</td><td>90.425</td></tr><tr><td>O4_25.8832m / H2_28.2130m</td><td>0.431</td><td>45.988</td><td>-12.765</td></tr><tr><td>O4_25.8832m / N2_121.767m</td><td>0.43</td><td>31.011</td><td>1.593</td></tr><tr><td>H1_12.3684m / Ar3_8.98898m</td><td>0.43</td><td>114.229</td><td>109.369</td></tr><tr><td>S3_18.7078m / N2_121.767m</td><td>0.428</td><td>85.685</td><td>-135.148</td></tr><tr><td>N3_57.3238m / N2_205.244m</td><td>0.428</td><td>99.587</td><td>-149.68</td></tr><tr><td>H1_12.3684m / S3_18.7078m</td><td>0.425</td><td>126.548</td><td>194.561</td></tr><tr><td>S3_33.4704m / N2_205.244m</td><td>0.424</td><td>76.793</td><td>-153.13</td></tr><tr><td>H1_12.3684m / Ar3_21.8253m</td><td>0.423</td><td>110.31</td><td>-18.305</td></tr><tr><td>Ne3_15.5509m / N2_205.244m</td><td>0.423</td><td>74.743</td><td>-152.017</td></tr><tr><td>O3_88.3323m / N3_57.3238m</td><td>0.422</td><td>297.947</td><td>-316.997</td></tr><tr><td>Ar3_21.8253m / N2_205.244m</td><td>0.419</td><td>83.176</td><td>-10.571</td></tr><tr><td>Fe3_22.9190m / N2_121.767m</td><td>0.418</td><td>90.861</td><td>-28.354</td></tr><tr><td>O3_88.3323m / S3_33.4704m</td><td>0.416</td><td>593.081</td><td>-270.111</td></tr><tr><td>S4_10.5076m / Ar3_8.98898m</td><td>0.414</td><td>206.794</td><td>-133.089</td></tr><tr><td>O4_25.8832m / Si2_34.8046m</td><td>0.41</td><td>45.209</td><td>78.238</td></tr><tr><td>S4_10.5076m / S3_18.7078m</td><td>0.41</td><td>320.263</td><td>-37.828</td></tr><tr><td>H1_12.3684m / Ar3_33.4704m</td><td>0.409</td><td>118.66</td><td>205.23</td></tr><tr><td>H1_12.3684m / O1_145.495m</td><td>0.408</td><td>-1864.77</td><td>-718.005</td></tr><tr><td>H2_9.66228m / H2_17.0300m</td><td>0.406</td><td>82.504</td><td>30.48</td></tr><tr><td>Ar3_8.98898m / N2_205.244m</td><td>0.406</td><td>84.64</td><td>-108.995</td></tr><tr><td>S4_10.5076m / S3_33.4704m</td><td>0.406</td><td>285.169</td><td>17.998</td></tr><tr><td>S3_18.7078m / N2_205.244m</td><td>0.406</td><td>73.539</td><td>-133.295</td></tr><tr><td>O3_88.3323m / Ar2_6.98337m</td><td>0.405</td><td>110.162</td><td>-273.012</td></tr><tr><td>H2_12.2752m / H2_17.0300m</td><td>0.405</td><td>101.622</td><td>69.297</td></tr><tr><td>H1_12.3684m / Ne2_12.8101m</td><td>0.405</td><td>60.832</td><td>47.995</td></tr><tr><td>S4_10.5076m / O1_63.1679m</td><td>0.404</td><td>-1237.19</td><td>-50.8</td></tr><tr><td>S4_10.5076m / Fe2_25.9811m</td><td>0.403</td><td>135.003</td><td>-158.851</td></tr><tr><td>O4_25.8832m / Fe2_25.9811m</td><td>0.403</td><td>41.974</td><td>22.719</td></tr><tr><td>S4_10.5076m / Ar2_6.98337m</td><td>0.403</td><td>91.98</td><td>-184.136</td></tr><tr><td>O3_88.3323m / Si2_34.8046m</td><td>0.403</td><td>227.883</td><td>-107.856</td></tr><tr><td>O4_25.8832m / Fe2_17.9314m</td><td>0.4</td><td>42.076</td><td>-9.965</td></tr><tr><td>S4_10.5076m / Fe2_17.9314m</td><td>0.4</td><td>187.512</td><td>-392.413</td></tr><tr><td>O3_88.3323m / H2_17.0300m</td><td>0.399</td><td>766.153</td><td>-1578.728</td></tr><tr><td>S4_10.5076m / Ar3_21.8253m</td><td>0.399</td><td>203.557</td><td>-364.099</td></tr><tr><td>S4_10.5076m / N3_57.3238m</td><td>0.399</td><td>164.224</td><td>-77.437</td></tr><tr><td>S4_10.5076m / Fe3_22.9190m</td><td>0.392</td><td>185.443</td><td>-234.334</td></tr><tr><td>O4_25.8832m / Ar2_6.98337m</td><td>0.392</td><td>36.116</td><td>-9.663</td></tr><tr><td>O3_88.3323m / Ar3_8.98898m</td><td>0.387</td><td>284.905</td><td>-318.54</td></tr></tbody></table>

<table><caption>**Table A.2.** continued.</caption><thead><tr><th>Line ratio</th><th>ρ</th><th>A</th><th>B</th></tr></thead><tbody><tr><td>S4_10.5076m / Ne2_12.8101m</td><td>0.385</td><td>78.214</td><td>-62.4</td></tr><tr><td>S3_33.4704m / Ar2_6.98337m</td><td>0.384</td><td>126.295</td><td>-249.556</td></tr><tr><td>Ne3_15.5509m / H2_17.0300m</td><td>0.38</td><td>-1741.288</td><td>2919.958</td></tr><tr><td>S3_18.7078m / Ar2_6.98337m</td><td>0.378</td><td>124.451</td><td>-226.135</td></tr><tr><td>O4_25.8832m / H2_12.2752m</td><td>0.377</td><td>244.608</td><td>-264.916</td></tr><tr><td>O3_88.3323m / Ne2_12.8101m</td><td>0.376</td><td>104.286</td><td>-149.435</td></tr><tr><td>O3_88.3323m / Ar3_21.8253m</td><td>0.376</td><td>293.241</td><td>-666.594</td></tr><tr><td>H1_12.3684m / N3_57.3238m</td><td>0.375</td><td>86.295</td><td>108.161</td></tr><tr><td>Fe3_22.9190m / N2_205.244m</td><td>0.374</td><td>83.949</td><td>-49.791</td></tr><tr><td>Ne3_15.5509m / Ar2_6.98337m</td><td>0.372</td><td>124.621</td><td>-254.015</td></tr><tr><td>O4_25.8832m / Ne2_12.8101m</td><td>0.37</td><td>34.232</td><td>31.129</td></tr><tr><td>S4_10.5076m / O3_88.3323m</td><td>0.368</td><td>532.903</td><td>278.691</td></tr><tr><td>Ne3_15.5509m / Si2_34.8046m</td><td>0.368</td><td>400.122</td><td>-32.15</td></tr><tr><td>O3_88.3323m / Fe3_22.9190m</td><td>0.368</td><td>310.557</td><td>-561.035</td></tr><tr><td>Ne5_24.2065m / H2_28.2130m</td><td>0.365</td><td>81.471</td><td>104.607</td></tr><tr><td>O4_25.8832m / Fe3_22.9190m</td><td>0.365</td><td>45.404</td><td>20.622</td></tr><tr><td>Ne3_15.5509m / Ar3_8.98898m</td><td>0.364</td><td>572.285</td><td>-415.788</td></tr><tr><td>Ne5_24.2065m / H2_17.0300m</td><td>0.363</td><td>86.667</td><td>152.264</td></tr><tr><td>Ne5_14.3228m / H2_28.2130m</td><td>0.362</td><td>77.986</td><td>107.966</td></tr><tr><td>O4_25.8832m / O1_63.1679m</td><td>0.362</td><td>82.694</td><td>120.192</td></tr><tr><td>Ne5_14.3228m / H2_17.0300m</td><td>0.36</td><td>80.987</td><td>151.057</td></tr><tr><td>O3_88.3323m / LTIR500.500m</td><td>0.36</td><td>224.753</td><td>564.26</td></tr><tr><td>O3_88.3323m / H2_28.2130m</td><td>0.359</td><td>31.542</td><td>-53.397</td></tr><tr><td>O3_88.3323m / C2_157.636m<sup>(1)</sup></td><td>0.356</td><td>663.323</td><td>-302.962</td></tr><tr><td>S4_10.5076m / H2_12.2752m</td><td>0.355</td><td>-120.152</td><td>293.134</td></tr><tr><td>S3_33.4704m / Ne2_12.8101m</td><td>0.352</td><td>100.569</td><td>-78.356</td></tr><tr><td>O3_88.3323m / Fe2_17.9314m</td><td>0.351</td><td>212.062</td><td>-530.383</td></tr><tr><td>LTIR500.500m / N2_121.767m</td><td>0.351</td><td>110.802</td><td>-517.864</td></tr><tr><td>Ne3_15.5509m / H2_28.2130m</td><td>0.35</td><td>32.395</td><td>-40.951</td></tr><tr><td>Ne3_15.5509m / Ar3_21.8253m</td><td>0.35</td><td>613.279</td><td>-1152.203</td></tr><tr><td>O4_25.8832m / O1_145.495m</td><td>0.349</td><td>96.075</td><td>35.9</td></tr><tr><td>S3_18.7078m / Ne2_12.8101m</td><td>0.347</td><td>100.916</td><td>-64.499</td></tr><tr><td>H2_9.66228m / H2_28.2130m</td><td>0.346</td><td>64.117</td><td>9.046</td></tr><tr><td>Ar3_21.8253m / Ne2_12.8101m</td><td>0.346</td><td>137.09</td><td>130.134</td></tr><tr><td>Ne3_315.5509m / Ne2_12.8101m<sup>(2)</sup></td><td>0.344</td><td>104.82</td><td>-92.819</td></tr><tr><td>Ar3_21.8253m / Ar3_8.98898m</td><td>0.344</td><td>4298.962</td><td>5038.792</td></tr><tr><td>Ne3_15.5509m / Fe2_17.9314m</td><td>0.342</td><td>436.726</td><td>-948.463</td></tr><tr><td>O4_25.8832m / Ar3_8.98898m</td><td>0.34</td><td>45.886</td><td>51.343</td></tr><tr><td>O3_88.3323m / S3_18.7078m</td><td>0.337</td><td>591.496</td><td>-356.255</td></tr><tr><td>Ne3_15.5509m / S3_33.4704m</td><td>0.337</td><td>5021.612</td><td>-209.836</td></tr><tr><td>O4_25.8832m / N3_57.3238m</td><td>0.334</td><td>42.652</td><td>57.234</td></tr><tr><td>Ne3_15.5509m / LTIR500.500m</td><td>0.334</td><td>385.81</td><td>1115.446</td></tr><tr><td>O4_25.8832m / LTIR500.500m</td><td>0.334</td><td>47.755</td><td>219.676</td></tr><tr><td>Ar3_8.98898m / Ne2_12.8101m</td><td>0.334</td><td>124.763</td><td>-16.237</td></tr><tr><td>S4_10.5076m / O1_145.495m</td><td>0.333</td><td>-291.079</td><td>323.948</td></tr><tr><td>O4_25.8832m / Ar3_21.8253m</td><td>0.331</td><td>46.423</td><td>-1.869</td></tr><tr><td>Ne3_15.5509m / Fe3_22.9190m</td><td>0.33</td><td>496.239</td><td>-680.146</td></tr><tr><td>Ne3_15.5509m / N3_57.3238m</td><td>0.33</td><td>334.664</td><td>-182.823</td></tr><tr><td>O4_25.8832m / H2_9.66228m</td><td>0.328</td><td>490.167</td><td>-363.316</td></tr><tr><td>O4_25.8832m / S3_33.4704m</td><td>0.328</td><td>50.857</td><td>89.695</td></tr><tr><td>Ne5_24.2065m / N2_205.244m</td><td>0.326</td><td>33.235</td><td>58.843</td></tr><tr><td>Ne5_24.2065m / N2_205.244m</td><td>0.326</td><td>33.235</td><td>58.843</td></tr><tr><td>O4_25.8832m / S3_18.7078m</td><td>0.326</td><td>52.269</td><td>80.948</td></tr><tr><td>N3_57.3238m / Ar2_6.98337m</td><td>0.324</td><td>211.817</td><td>-319.099</td></tr><tr><td>Ne5_14.3228m / N2_205.244m</td><td>0.324</td><td>32.284</td><td>60.815</td></tr><tr><td>Ne5_24.2065m / N2_121.767m</td><td>0.322</td><td>35.963</td><td>69.431</td></tr><tr><td>Ne5_14.3228m / N2_121.767m</td><td>0.32</td><td>35.07</td><td>71.342</td></tr><tr><td>N3_57.3238m / Ne2_12.8101m</td><td>0.32</td><td>145.588</td><td>-44.665</td></tr><tr><td>O3_88.3323m / Fe2_25.9811m</td><td>0.318</td><td>171.32</td><td>-287.367</td></tr><tr><td>S3_18.7078m / Ar3_8.98898m</td><td>0.318</td><td>572.867</td><td>-293.951</td></tr><tr><td>Si2_34.8046m / N2_205.244m</td><td>0.316</td><td>75.291</td><td>-127.086</td></tr><tr><td>Si2_34.8046m / N2_121.767m</td><td>0.313</td><td>89.742</td><td>-135.462</td></tr><tr><td>H1_12.3684m / Ne3_15.5509m</td><td>0.312</td><td>131.48</td><td>227.804</td></tr><tr><td>H2_12.2752m / H2_28.2130m</td><td>0.312</td><td>77.74</td><td>32.316</td></tr><tr><td>Ne5_24.2065m / Ar2_6.98337m</td><td>0.311</td><td>38.156</td><td>71.118</td></tr><tr><td>S3_18.7078m / Fe3_22.9190m</td><td>0.311</td><td>266.128</td><td>297.313</td></tr><tr><td>S3_18.7078m / H2_17.0300m</td><td>0.31</td><td>541.475</td><td>-634.385</td></tr></tbody></table>
<table><caption>Table A.2. continued.</caption><thead><tr><th>Line ratio</th><th>ρ</th><th>A</th><th>B</th></tr></thead><tbody><tr><td>Ne5_14.3228m / Ar2_6.98337m</td><td>0.308</td><td>37.532</td><td>73.659</td></tr><tr><td>S3_18.7078m / Fe2_17.9314m</td><td>0.307</td><td>357.808</td><td>-684.135</td></tr><tr><td>Ne5_14.3228m / H2_12.2752m</td><td>0.307</td><td>226.448</td><td>275.349</td></tr><tr><td>S3_33.4704m / Fe3_22.9190m</td><td>0.299</td><td>531.155</td><td>-699.26</td></tr><tr><td>Ne5_24.2065m / Ne2_12.8101m</td><td>0.299</td><td>34.38</td><td>107.357</td></tr><tr><td>Ne3_15.5509m / S3_18.7078m</td><td>0.298</td><td>-20086.043</td><td>4185.186</td></tr><tr><td>S3_33.4704m / H2_17.0300m</td><td>0.298</td><td>1494.699</td><td>-2272.294</td></tr><tr><td><b>Ne5_14.3228m / Ne2_12.8101m<sup>(2)</sup></b></td><td>0.297</td><td>33.683</td><td>108.606</td></tr><tr><td>Ne3_15.5509m / C2_157.636m</td><td>0.296</td><td>-1935.617</td><td>158.812</td></tr><tr><td>O4_25.8832m / Ne3_15.5509m</td><td>0.295</td><td>54.356</td><td>92.73</td></tr><tr><td><b>Lbol / LTIR500.500m<sup>(3)</sup></b></td><td>0.744</td><td>94.186</td><td>-7.617</td></tr><tr><td>Lbol / O2_3726+9A</td><td>0.657</td><td>83.845</td><td>-199.221</td></tr><tr><td>Lbol / S2_6716+30A</td><td>0.654</td><td>89.291</td><td>-289.073</td></tr><tr><td>Lbol / S3_9069+532A</td><td>0.643</td><td>166.175</td><td>-442.796</td></tr><tr><td>Lbol / N2_6548+84A</td><td>0.633</td><td>56.068</td><td>-182.48</td></tr><tr><td>Lbol / O1_6300+63A</td><td>0.626</td><td>90.88</td><td>-388.582</td></tr><tr><td>Lbol / O2_7320+30A</td><td>0.561</td><td>99.197</td><td>-416.007</td></tr><tr><td>He1_4471.49A / LTIR500.500m</td><td>0.485</td><td>101.138</td><td>389.835</td></tr><tr><td>O3_5007+4959A / LTIR500.500m</td><td>0.482</td><td>129.647</td><td>218.446</td></tr><tr><td>He2_4685.64A / O1_6300+63A</td><td>0.474</td><td>30.351</td><td>37.215</td></tr><tr><td>O3_4363.21A / LTIR500.500m</td><td>0.474</td><td>89.804</td><td>330.476</td></tr><tr><td>H1_6562.81A / LTIR500.500m</td><td>0.467</td><td>90.408</td><td>185.749</td></tr><tr><td>He1_4471.49A / S2_6716+30A</td><td>0.46</td><td>98.497</td><td>63.539</td></tr><tr><td>He1_4471.49A / O1_6300+63A</td><td>0.459</td><td>100.364</td><td>-38.5</td></tr><tr><td>He1_4471.49A / O2_3726+9A</td><td>0.456</td><td>85.291</td><td>133.629</td></tr><tr><td>He1_7065.22A / LTIR500.500m</td><td>0.455</td><td>91.203</td><td>365.114</td></tr><tr><td>He2_4685.64A / S2_6716+30A</td><td>0.452</td><td>31.702</td><td>66.998</td></tr><tr><td>He1_4471.49A / N2_6548+84A</td><td>0.448</td><td>61.434</td><td>35.734</td></tr><tr><td>H1_6562.81A / O1_6300+63A</td><td>0.446</td><td>89.915</td><td>-196.585</td></tr><tr><td>He2_4685.64A / N2_6548+84A</td><td>0.445</td><td>26.832</td><td>54.478</td></tr><tr><td>H1_6562.81A / S2_6716+30A</td><td>0.441</td><td>76.735</td><td>-77.414</td></tr><tr><td>O3_4363.21A / O1_6300+63A</td><td>0.441</td><td>78.211</td><td>-35.368</td></tr><tr><td>H1_6562.81A / O2_3726+9A</td><td>0.439</td><td>73.687</td><td>-12.733</td></tr><tr><td>O3_4363.21A / N2_6548+84A</td><td>0.435</td><td>56.741</td><td>23.599</td></tr><tr><td>H1_6562.81A / N2_6548+84A</td><td>0.433</td><td>55.108</td><td>-64.184</td></tr><tr><td>O3_5007+4959A / N2_6548+84A</td><td>0.432</td><td>74.729</td><td>-121.723</td></tr><tr><td>He2_4685.64A / O2_3726+9A</td><td>0.431</td><td>31.665</td><td>92.547</td></tr><tr><td>He1_7065.22A / O1_6300+63A</td><td>0.431</td><td>84.558</td><td>-15.205</td></tr><tr><td>S3_9069+532A / N2_6548+84A</td><td>0.43</td><td>90.149</td><td>-58.788</td></tr></tbody></table>

<table><caption>Table A.2. continued.</caption><thead><tr><th>Line ratio</th><th>ρ</th><th>A</th><th>B</th></tr></thead><tbody><tr><td>O3_4363.21A / S2_6716+30A</td><td>0.43</td><td>104.103</td><td>26.316</td></tr><tr><td>He1_7065.22A / N2_6548+84A</td><td>0.43</td><td>53.519</td><td>44.727</td></tr><tr><td>He1_7065.22A / S2_6716+30A</td><td>0.429</td><td>85.351</td><td>71.304</td></tr><tr><td>O3_5007+4959A / S2_6716+30A</td><td>0.428</td><td>130.992</td><td>-201.584</td></tr><tr><td>O3_4363.21A / O2_3726+9A</td><td>0.428</td><td>83.402</td><td>108.7</td></tr><tr><td>O3_5007+4959A / O1_6300+63A</td><td>0.428</td><td>122.712</td><td>-307.378</td></tr><tr><td>He1_7065.22A / O2_3726+9A</td><td>0.428</td><td>74.339</td><td>130.894</td></tr><tr><td>O3_4363.21A / O2_7320+30A</td><td>0.426</td><td>94.94</td><td>-46.28</td></tr><tr><td><b>O3_5007+4959A / O2_3726+9A<sup>(3)</sup></b></td><td>0.425</td><td>116.705</td><td>-78.682</td></tr><tr><td>He2_4685.64A / O2_7320+30A</td><td>0.417</td><td>34.159</td><td>36.552</td></tr><tr><td>He1_4471.49A / S3_9069+532A</td><td>0.417</td><td>165.225</td><td>216.826</td></tr><tr><td>O2_3726+9A / N2_6548+84A</td><td>0.415</td><td>201.998</td><td>-192.16</td></tr><tr><td>O2_7320+30A / N2_6548+84A</td><td>0.414</td><td>162.477</td><td>132.045</td></tr><tr><td>O3_5007+4959A / S3_9069+532A</td><td>0.41</td><td>371.586</td><td>-352.117</td></tr><tr><td>He2_4685.64A / LTIR500.500m</td><td>0.409</td><td>33.221</td><td>177.064</td></tr><tr><td>O3_4363.21A / S3_9069+532A</td><td>0.406</td><td>144.841</td><td>156.083</td></tr><tr><td>He1_4471.49A / O2_7320+30A</td><td>0.404</td><td>112.029</td><td>-6.214</td></tr><tr><td><b>S3_9069+532A / S2_6716+30A<sup>(3)</sup></b></td><td>0.402</td><td>211.532</td><td>-128.321</td></tr><tr><td>S3_9069+532A / O2_3726+9A</td><td>0.396</td><td>185.958</td><td>44.773</td></tr><tr><td>He1_7065.22A / O2_7320+30A</td><td>0.392</td><td>89.482</td><td>-7.637</td></tr><tr><td>He1_7065.22A / S3_9069+532A</td><td>0.39</td><td>121.28</td><td>187.334</td></tr><tr><td>H1_6562.81A / S3_9069+532A</td><td>0.39</td><td>136.392</td><td>-66.812</td></tr><tr><td>O3_5007+4959A / O2_7320+30A</td><td>0.385</td><td>154.476</td><td>-389.291</td></tr><tr><td>O3_4363.21A / O3_5006.84A</td><td>0.382</td><td>254.49</td><td>482.617</td></tr><tr><td>O3_4363.21A / O3_5007+4959A</td><td>0.382</td><td>249.591</td><td>505.516</td></tr><tr><td>He2_4685.64A / S3_9069+532A</td><td>0.378</td><td>36.926</td><td>103.908</td></tr><tr><td>H1_6562.81A / O2_7320+30A</td><td>0.374</td><td>98.921</td><td>-209.783</td></tr><tr><td>S2_6716+30A / N2_6548+84A</td><td>0.373</td><td>157.312</td><td>-5.541</td></tr><tr><td>O2_7320+30A / S2_6716+30A</td><td>0.347</td><td>840.02</td><td>810.936</td></tr><tr><td>O2_7320+30A / O2_3726+9A</td><td>0.343</td><td>437.593</td><td>811.678</td></tr><tr><td>LTIR500.500m / N2_6548+84A</td><td>0.326</td><td>151.553</td><td>-489.71</td></tr><tr><td>S3_9069+532A / O1_6300+63A</td><td>0.319</td><td>199.35</td><td>-316.807</td></tr><tr><td>O3_4363.21A / He1_4471.49A</td><td>0.306</td><td>628.672</td><td>-88.671</td></tr><tr><td>He2_4685.64A / He1_4471.49A</td><td>0.305</td><td>51.199</td><td>68.665</td></tr><tr><td>He2_4685.64A / H1_6562.81A</td><td>0.304</td><td>54.035</td><td>170.776</td></tr></tbody></table>

The fits are of the form $Y = AX + B$ where $Y = f_{esc,HII}$ [‰] and $X = \log_{10}(R)$ for a given line ratio R. (1): See Figs. 12 and 13. (2): See Figs. 14 and 15. (3): See Figs. 16 and 17.
<table><caption>**Table A.3.** Table comparing the predicted H I column densities and H I gas masses to values from the literature.</caption><thead><tr><th>#</th><th>Galaxy</th><th>log MH i<sup>(0)</sup><sub>pred</sub></th><th>log MH i<sup>(1)</sup><sub>obs</sub></th><th>log N(H i)<sub>max,pred</sub></th><th>log N(H i)<sub>min,pred</sub></th><th>log N(H i)<sub>obs</sub></th></tr></thead><tbody><tr><td>1</td><td>Haro2</td><td>8.37<sup>+0.09</sup><sub>-0.07</sub></td><td>8.58<sup>+0.06</sup><sub>-0.08</sub></td><td>19.47</td><td>18.79</td><td>19.6-20.5<sup>2</sup></td></tr><tr><td>2</td><td>Haro3</td><td>7.93<sup>+0.70</sup><sub>-0.46</sub></td><td>9.05<sup>+0.01</sup><sub>-0.01</sub></td><td>18.92</td><td>18.29</td><td></td></tr><tr><td>3</td><td>Haro11</td><td>9.75<sup>+0.21</sup><sub>-0.15</sub></td><td>8.70<sup>+0.18</sup><sub>-0.30</sub></td><td>19.08</td><td>18.73</td><td></td></tr><tr><td>4</td><td>He2-10</td><td>7.56<sup>+0.18</sup><sub>-0.33</sub></td><td>8.49<sup>+0.03</sup><sub>-0.03</sub></td><td>19.33</td><td>18.74</td><td></td></tr><tr><td>5</td><td>HS0052+2536</td><td>9.79<sup>+0.06</sup><sub>-0.06</sub></td><td>&lt;10.68</td><td>20.0</td><td>18.54</td><td></td></tr><tr><td>6</td><td>HS0822+3542</td><td>4.94<sup>+0.84</sup><sub>-1.71</sub></td><td>7.75<sup>+0.09</sup><sub>-0.11</sub></td><td>21.67</td><td>21.67</td><td></td></tr><tr><td>7</td><td>HS1222+3741</td><td>8.39<sup>+0.17</sup><sub>-0.35</sub></td><td></td><td>20.16</td><td>20.16</td><td></td></tr><tr><td>8</td><td>HS1304+3529</td><td>8.83<sup>+0.08</sup><sub>-0.07</sub></td><td></td><td>20.42</td><td>20.42</td><td></td></tr><tr><td>9</td><td>HS1319+3224</td><td>6.4<sup>+1.07</sup><sub>-1.25</sub></td><td></td><td>18.46</td><td>17.86</td><td></td></tr><tr><td>10</td><td>HS1330+3651</td><td>8.43<sup>+0.46</sup><sub>-1.05</sub></td><td></td><td>20.37</td><td>20.37</td><td></td></tr><tr><td>11</td><td>HS1442+4250</td><td>5.48<sup>+0.59</sup><sub>-0.56</sub></td><td>8.49<sup>+0.01</sup><sub>-0.01</sub></td><td>20.84</td><td>19.29</td><td></td></tr><tr><td>12</td><td>IIZw40</td><td>8.52<sup>+0.11</sup><sub>-0.11</sub></td><td>8.75<sup>+0.06</sup><sub>-0.08</sub></td><td>19.18</td><td>18.96</td><td></td></tr><tr><td>13</td><td>IZw18</td><td>7.68<sup>+0.13</sup><sub>-0.11</sub></td><td>8.0<sup>+0.06</sup><sub>-0.08</sub></td><td>20.27</td><td>19.12</td><td>21.0-21.5<sup>2</sup>; 21.28±0.03<sup>3</sup></td></tr><tr><td>14</td><td>Mrk153</td><td>8.56<sup>+0.06</sup><sub>-0.06</sub></td><td>&lt;8.84</td><td>19.61</td><td>18.4</td><td></td></tr><tr><td>15</td><td>Mrk209</td><td>6.87<sup>+0.08</sup><sub>-0.10</sub></td><td>7.44<sup>+0.03</sup><sub>-0.03</sub></td><td>19.87</td><td>18.59</td><td></td></tr><tr><td>16</td><td>Mrk930</td><td>9.62<sup>+0.04</sup><sub>-0.06</sub></td><td>9.5<sup>+0.05</sup><sub>-0.05</sub></td><td>19.54</td><td>19.54</td><td></td></tr><tr><td>17</td><td>Mrk1089</td><td>9.39<sup>+0.21</sup><sub>-0.26</sub></td><td>10.17<sup>+0.03</sup><sub>-0.04</sub></td><td>18.96</td><td>18.33</td><td></td></tr><tr><td>18</td><td>Mrk1450</td><td>7.49<sup>+0.15</sup><sub>-0.17</sub></td><td>7.63<sup>+0.06</sup><sub>-0.08</sub></td><td>19.27</td><td>18.81</td><td></td></tr><tr><td>19</td><td>NGC1140</td><td>8.01<sup>+0.15</sup><sub>-0.14</sub></td><td>9.54<sup>+0.10</sup><sub>-0.13</sub></td><td>18.43</td><td>18.28</td><td></td></tr><tr><td>20</td><td>NGC1569</td><td>8.47<sup>+0.04</sup><sub>-0.04</sub></td><td>8.25<sup>+0.06</sup><sub>-0.08</sub></td><td>19.26</td><td>18.98</td><td></td></tr><tr><td>21</td><td>NGC1705</td><td>6.63<sup>+0.12</sup><sub>-0.09</sub></td><td>7.88<sup>+0.05</sup><sub>-0.06</sub></td><td>19.1</td><td>17.97</td><td></td></tr><tr><td>22</td><td>NGC5253</td><td>7.85<sup>+0.35</sup><sub>-0.30</sub></td><td>8.03<sup>+0.02</sup><sub>-0.03</sub></td><td>18.83</td><td>18.79</td><td></td></tr><tr><td>23</td><td>NGC625</td><td>5.46<sup>+0.66</sup><sub>-0.63</sub></td><td>8.04<sup>+0.07</sup><sub>-0.09</sub></td><td>19.16</td><td>18.72</td><td></td></tr><tr><td>24</td><td>Pox186</td><td>5.3<sup>+1.14</sup><sub>-1.71</sub></td><td>&lt;6.30</td><td>19.75</td><td>19.3</td><td></td></tr><tr><td>25</td><td>SBS0335-052</td><td>8.72<sup>+0.09</sup><sub>-0.09</sub></td><td>8.64<sup>+0.04</sup><sub>-0.05</sub></td><td>21.29</td><td>18.85</td><td>21.4-21.7<sup>2</sup>; 21.7±0.05<sup>3</sup></td></tr><tr><td>26</td><td>SBS1159+545</td><td>8.22<sup>+0.11</sup><sub>-0.15</sub></td><td>&lt;7.80</td><td>21.04</td><td>20.13</td><td></td></tr><tr><td>27</td><td>SBS1211+540</td><td>6.69<sup>+0.40</sup><sub>-0.51</sub></td><td>7.75<sup>+0.06</sup><sub>-0.08</sub></td><td>20.56</td><td>20.56</td><td></td></tr><tr><td>28</td><td>SBS1249+493</td><td>8.41<sup>+0.37</sup><sub>-0.45</sub></td><td>9.0<sup>+0.17</sup><sub>-0.29</sub></td><td>20.11</td><td>19.65</td><td></td></tr><tr><td>29</td><td>SBS1415+437</td><td>7.79<sup>+0.07</sup><sub>-0.10</sub></td><td>8.64<sup>+0.04</sup><sub>-0.05</sub></td><td>20.8</td><td>20.8</td><td></td></tr><tr><td>30</td><td>SBS1533+574</td><td>8.74<sup>+0.04</sup><sub>-0.04</sub></td><td>9.48<sup>+0.05</sup><sub>-0.05</sub></td><td>19.57</td><td>19.08</td><td></td></tr><tr><td>31</td><td>Tol1214-277</td><td>2.41<sup>+0.73</sup><sub>-0.23</sub></td><td>&lt;8.51</td><td>19.93</td><td>19.93</td><td></td></tr><tr><td>32</td><td>UM448</td><td>8.26<sup>+0.31</sup><sub>-1.05</sub></td><td>9.78<sup>+0.11</sup><sub>-0.14</sub></td><td>19.26</td><td>18.68</td><td></td></tr><tr><td>33</td><td>UM461</td><td>7.07<sup>+0.24</sup><sub>-0.30</sub></td><td>7.86<sup>+0.02</sup><sub>-0.02</sub></td><td>20.01</td><td>19.48</td><td></td></tr><tr><td>34</td><td>VIIZW403</td><td>6.06<sup>+0.33</sup><sub>-0.35</sub></td><td>7.51<sup>+0.03</sup><sub>-0.04</sub></td><td>19.88</td><td>19.61</td><td></td></tr><tr><td>35</td><td>UGC4483</td><td>6.0<sup>+0.38</sup><sub>-0.51</sub></td><td>7.40<sup>+0.02</sup><sub>-0.02</sub></td><td>20.44</td><td>19.42</td><td></td></tr><tr><td>36</td><td>UM133</td><td>8.01<sup>+0.08</sup><sub>-0.09</sub></td><td>8.33<sup>+0.02</sup><sub>-0.02</sub></td><td>20.38</td><td>20.38</td><td></td></tr><tr><td>37</td><td>HS0017+1055</td><td>7.66<sup>+0.39</sup><sub>-0.41</sub></td><td>&lt;8.24</td><td>20.43</td><td>20.43</td><td></td></tr><tr><td>38</td><td>HS2352+2733</td><td>4.53<sup>+0.70</sup><sub>-0.78</sub></td><td>&lt;10.36</td><td>18.77</td><td>18.77</td><td></td></tr><tr><td>39</td><td>NGC4214-c</td><td>7.17<sup>+0.36</sup><sub>-0.42</sub></td><td>&lt;8.58</td><td>18.95</td><td>17.43</td><td>21.12±0.03<sup>3</sup></td></tr><tr><td>40</td><td>NGC4214-s</td><td>6.61<sup>+0.11</sup><sub>-0.13</sub></td><td>&lt;8.58</td><td>19.02</td><td>18.34</td><td>21.12±0.03<sup>3</sup></td></tr></tbody></table>

This table complements the discussion from Sect. 7.2.2 and the H I gas mass comparison presented in Fig. A.2. (0): The interval is the highest density interval at 94%. (1): Rémy-Ruyer et al. (2014) (2): Kunth et al. (1998) (3): James et al. (2014)