Table A.1.
Yields of H I-, He I-, and He II-ionizing photons (Iion,H I, Iion,He I, and Iion,He II respectively).
| Metallicity | Stripped stars | STARBURST99 | BPASS (single stars) | BPASS (single and binary stars) |
|---|---|---|---|---|
| Yields of H I-ionizing photons, Iion,H I in 1052 s−1 (M⊙ yr−1)−1 | ||||
| 0.014 | 0.83 | 14.06 | 14.19 | 14.66 |
| 0.006 | 0.97 | 14.37( † ) | 16.43 | 18.99 |
| 0.002 | 1.08 | 20.92 | 20.12 | 24.36 |
| 0.0002 | 0.87 | 21.15( ‡ ) | 24.8( * ) | 31.53( * ) |
| Yields of He I-ionizing photons, Iion,He I in 1052 s−1 (M⊙ yr−1)−1 | ||||
| 0.014 | 0.44 | 2.08 | 2.55 | 2.76 |
| 0.006 | 0.5 | 2.54( † ) | 3.4 | 4.2 |
| 0.002 | 0.53 | 4.37 | 4.74 | 6.35 |
| 0.0002 | 0.27 | 5.02( ‡ ) | 7.66( * ) | 10.62( * ) |
| Yields of He II-ionizing photons, log10(Iion,He II)/(s−1 (M⊙ yr−1)−1) | ||||
| 0.014 | 49.4 | 48.6 | 49.6 | 49.5 |
| 0.006 | 49.2 | 49.5( † ) | 49.7 | 49.6 |
| 0.002 | 49.2 | 49.1 | 50.0 | 50.2 |
| 0.0002 | 46.8 | 48.9( ‡ ) | 49.5( * ) | 50.4( * ) |
Notes. We show the contribution from stripped stars and from massive stars for a range of metallicities. The dagger (†) indicates the quantities calculated for models with Z = 0.008, the double-dagger (‡) the quantities calculated for models with Z = 0.001, and the asterisk (*) the quantities calculated for models with Z = 0.0001. (Z⊙ ≡ 0.014, Asplund et al. 2009).
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