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Table 2
Coefficients of the linear fit to the amplitude versus [Fe/H] relationships (Eq. (4)) based on solitary Cepheids.
| AVRAD | AB | AR | |||||||||||||
| Sample | a | b | N | r | a | b | N | r | a | b | N | r | |||
| (σa) | (σb) | (σa) | (σb) | (σa) | (σb) | ||||||||||
|
|
|||||||||||||||
| F Cepheids, log P > 1.02 | 53.39 | −17.57 | 31 | −0.239 | 1.620 | −0.254 | 44 | −0.154 | 0.817 | −0.009 | 46 | − 0.011 | |||
| (0.85) | (7.74) | (0.066) | (0.255) | (0.029) | (0.114) | ||||||||||
| F Cepheids, log P < 1.02 | 37.01 | −24.58 | 58 | −0.515 | 1.054 | −0.273 | 105 | −0.237 | 0.571 | −0.162 | 108 | − 0.239 | |||
| (2.36) | (5.47) | (0.021) | (0.110) | (0.012) | (0.063) | ||||||||||
| 1OT Cepheids | 17.55 | −13.00 | 24 | −0.340 | 0.500 | −0.339 | 28 | −0.398 | 0.277 | −0.170 | 27 | −0.347 | |||
| (1.59) | (7.87) | (0.022) | (0.127) | (0.015) | (0.078) | ||||||||||
Notes. N is the number of Cepheids in the given sample, r is the correlation coefficient.
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