Open Access
Table 3.
Helium mass fraction inferred from various groups in the literature.
| Reference | YCZ | Equation of state |
|---|---|---|
| Richard et al. (1998) | 0.2480 ± 0.0020 | OPAL |
| Di Mauro et al. (2002) | 0.2457 ± 0.0005 | MHD |
| Di Mauro et al. (2002) | 0.2539 ± 0.0005 | OPAL |
| Basu & Antia (2004) | 0.24875 ± 0.0035 | OPAL |
| Vorontsov et al. (2013) | 0.2475 ± 0.0075 | OPAL and SAHA-S |
| Vorontsov et al. (2014) | 0.2525 ± 0.0075 | OPAL and SAHA-S |
| This work | 0.2575 ± 0.0025 | FreeEOS and SAHA-S |
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