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Table 1.
Summary of the steps considered for the sample selection.
| Selection | Number of objects | ||
|---|---|---|---|
| HELM-1σ | HELM-2σ | HELM-3σ | |
| Initial HELM selectiona | 3955 | 203 | 19 |
| Brown-dwarfb | 3 | 0 | 0 |
| χ2(Av < 1) < χ2(Av free) | 1326 | 28 | 1 |
| z > 8.5c | 3 | 1 | 0 |
| Spectroscopic datad | 9 | 1 | 1 |
| Visual inspection | 1425 | 15 | 3 |
| Final HELM sample | 1189 | 158 | 14 |
Notes. aSee Eq. (1); bMatching with the sample by Holwerda et al. (2024); cMatching with the sample by Finkelstein et al. (2024); dSources that are removed from the HELM sample thanks to spectroscopic data (Sect. C).
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