Table 4
Predicted timescales relevant for Cepheids of different initial mass and rotation rate.
| τCep [kyr] | ||||||||||||||||||
| First | Second | Third | Total | τloop [Myr] | τHe [Myr] | |||||||||||||
|
|
||||||||||||||||||
| ω | 0.0 | 0.5 | 0.8 | 0.0 | 0.5 | 0.8 | 0.0 | 0.5 | 0.8 | 0.0 | 0.5 | 0.8 | 0.0 | 0.5 | 0.8 | 0.0 | 0.5 | 0.8 |
|
|
||||||||||||||||||
| 5 M⊙ | 5.7 | 9.4 | 8.5 | 316 | 288 | 857 | 597 | 1553 | 1145 | 919 | 1851 | 2011 | 10.3 | 8.4 | 9.3 | 19.2 | 16.6 | 18.7 |
| 38 | 35 | 35 | 879 | 930 | 2681 | 1977 | 3422 | 2804 | 2894 | 4387 | 5520 | |||||||
|
|
||||||||||||||||||
| 7 M⊙ | 4.0 | 4.5 | 4.1 | 51 | 28 | 32 | 27 | 40 | 31.6 | 82 | 72 | 68 | 3.0 | 3.4 | 3.9 | 6.8 | 6.7 | 7.3 |
| 8.0 | 7.4 | 7.2 | 88 | 39 | 47 | 41 | 55 | 47 | 138 | 101 | 101 | |||||||
|
|
||||||||||||||||||
| 9 M⊙* | 2.2 | 3.0 | 2.7 | 14 | 11 | 11 | 6 | 13 | 10 | 22 | 27 | 24 | 1.5 | 1.6 | 1.9 | 3.4 | 3.3 | 3.6 |
| 2.7 | 2.7 | 2.6 | 9.4 | 6.7 | 8.9 | 6.9 | 12 | 9.2 | 19 | 21 | 21 | |||||||
Notes. Cepheid lifetimes in the three crossings and their sum (total lifetime) are listed in [kyr]. The duration of the blue loop and the core helium burning timescale are given in [Myr]. The asterisk is a reminder that ω = 0.7 was used instead of ω = 0.8 for 9 M⊙ models. The predicted values in the top rows for each mass are based on the Bono et al. (2000b) IS, the lower rows on Tammann et al. (2003).
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