| arXiv | Name | Symbol | Parsed | Bound |
|---|---|---|---|---|
| 1803.07564 🔍 (source) | hydrogen deficient | \log { ( H / He ) } | -5.0 |
Upper |
| 1909.10532 🔍 (source) | hydrogen-to-helium abundances | \log { ( H / He ) } | -10.0 |
Lower |
| 1909.10532 🔍 (source) | \log { ( H / He ) } | 2.0 |
Upper |