Table A.2.
Coefficients of the red and blue edges of the IS in the temperature–luminosity plane.
| P [d] | αblue | βblue | σαblue | σβblue | αred | βred | σαred | σβred |
|---|---|---|---|---|---|---|---|---|
| F and 1O Cepheids | ||||||||
| < 2.5 d | -0.020 | 3.816 | 0.005 | 0.003 | -0.024 | 3.749 | 0.003 | 0.002 |
| > 2.5 d | -0.065 | 3.798 | 0.005 | 0.001 | -0.071 | 3.722 | 0.004 | 0.002 |
| all | -0.043 | 3.801 | - | - | -0.042 | 3.735 | - | - |
| F Cepheids | ||||||||
| < 2 or 3 d★ | 0.014 | 3.828 | 0.006 | 0.005 | -0.040 | 3.733 | 0.009 | 0.007 |
| > 2 or 3 d | -0.040 | 3.792 | 0.005 | 0.002 | -0.137 | 3.700 | 0.010 | 0.003 |
| all | -0.032 | 3.794 | - | - | -0.053 | 3.724 | - | - |
| 1O Cepheids | ||||||||
| < 1.4 or 2 d★★ | -0.031 | 3.814 | 0.006 | 0.004 | 0.023 | 3.806 | 0.007 | 0.006 |
| > 1.4 or 2 d | -0.066 | 3.802 | 0.003 | 0.001 | -0.037 | 3.762 | 0.004 | 0.003 |
| all | -0.038 | 3.810 | - | - | -0.016 | 3.773 | - | - |
Notes. Coefficients of the red and blue edges of the IS considering a break at different pulsating periods, assuming log Teff = α(log L − 3.3)+β, for F and 1O together and separately. In addition, we include the coefficients without a break. ★ For F Cepheids, the break in the IS is observed at pulsation periods of 2 days for the blue edge, and 3 days for the red edge. ★★ For 1O Cepheids, the break in the IS is observed at pulsation periods of 1.4 days for the red edge, and 2 days for the blue edge.
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