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Table 1
Average [Fe/H] values for various groups of Cepheids.
| Sample | Solitary Cepheids | Binary Cepheids | Total sample | |||||||||||
| [Fe/H] | σ | N | [Fe/H] | σ | N | [Fe/H] | σ | N | ||||||
|
|
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| Fundamental mode (F) Cepheids, log P > 1.02 | 0.167 | 0.164 | 49 | 0.184 | 0.154 | 34 | 0.174 | 0.160 | 83 | |||||
| Fundamental mode (F) Cepheids, log P < 1.02 | 0.091 | 0.158 | 114 | 0.103 | 0.100 | 78 | 0.096 | 0.137 | 192 | |||||
| First overtone (1OT) Cepheids | 0.108 | 0.142 | 28 | 0.068 | 0.118 | 24 | 0.089 | 0.133 | 52 | |||||
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