Table 1.
Chemical compositions of the adopted pulsation models.
| [Fe/H] | Z | X |
|---|---|---|
| −2.00 | 0.00014 | 0.75115 |
| −1.50 | 0.00043 | 0.75041 |
| −1.35 | 0.00061 | 0.74996 |
| −1.00 | 0.00135 | 0.74806 |
| −0.50 | 0.00424 | 0.74073 |
| −0.20 | 0.00834 | 0.73032 |
| 0.00 | 0.01300 | 0.71847 |
Notes. The Z and X values are estimated from the [Fe/H] values by assuming the primordial helium value of 0.2485 from the WMAP CMB observations (Hinshaw et al. 2013) and the helium enrichment parameter value of 1.54 (Asplund et al. 2009). The solar mixture is adopted from Asplund et al. (2009).
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