Table 2.
Total fraction fCC of Cepheids in star clusters for the whole galaxy derived under different assumptions about the cluster distribution within the galaxy (indicated by Roman numerals; they are defined in Sect. 5), cluster dissolution processes, and metallicity Z.
| Z | Lower fCC |
Upper fCC |
||||||
|---|---|---|---|---|---|---|---|---|
| (i) | (ii) | (iii) | (iv) | (i) | (ii) | (iii) | (iv) | |
| 0.014 | 0.026 | 0.015 | 0.024 | 0.021 | 0.30 | 0.36 | 0.33 | 0.34 |
| 0.006 | 0.024 | 0.014 | 0.023 | 0.019 | 0.27 | 0.32 | 0.29 | 0.30 |
| 0.002 | 0.024 | 0.014 | 0.022 | 0.017 | 0.25 | 0.29 | 0.27 | 0.27 |
Notes. Columns 2–5 assume pronounced cluster dissolution with the fraction 
of clusters remaining gravitationally bound by the age t given by Eq. (8). This is likely the lower estimate on fCC. Columns 6–9 assume cluster dissolution by the galactic tidal field only, which provides an upper estimate on fCC.
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