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Table A.3

Estimated coefficients for the linear model in Eq. (1) of the central hydrogen exhaustion time (Gyr), for different Z values.

Estimate Std. error Impact Importance
(Gyr) (Gyr) (Gyr)

Z = 0.0001
β 0 –0.4596 0.0115
β1 (pp) 0.5368 0.0089 0.016 0.043
β2 (14N) –0.0776 0.0027 –0.008 0.021
β3 (kr) 7.4100 0.0052 0.370 1.000
β4 (vd) –0.1982 0.0017 –0.030 0.080

Z = 0.0005
β 0 –0.7055 0.0105
β1 (pp) 0.6674 0.0081 0.020 0.052
β2 (14N) –0.0965 0.0024 –0.010 0.025
β3 (kr) 7.7301 0.0047 0.387 1.000
β4 (vd) –0.2115 0.0016 –0.032 0.082

Z = 0.001
β 0 –0.8548 0.0130
β1 (pp) 0.8001 0.0101 0.024 0.059
β2 (14N) –0.1047 0.0030 –0.011 0.026
β3 (kr) 8.1423 0.0059 0.407 1.000
β4 (vd) –0.2379 0.0020 –0.036 0.088

Z = 0.006
β 0 –2.2543 0.0306
β1 (pp) 1.7872 0.0237 0.054 0.092
β2 (14N) –0.1437 0.0071 –0.014 0.025
β3 (kr) 11.5876 0.0139 0.579 1.000
β4 (vd) –0.4341 0.0046 –0.065 0.112

Z = 0.01
β 0 –2.4268 0.0421
β1 (pp) 2.2898 0.0325 0.069 0.104
β2 (14N) –0.1721 0.0097 –0.017 0.026
β3 (kr) 13.2384 0.0191 0.662 1.000
β4 (vd) –0.6116 0.0064 –0.092 0.139

Z = 0.02
β 0 –3.1791 0.0600
β1 (pp) 3.2350 0.0464 0.097 0.119
β2 (14N) –0.2074 0.0139 –0.021 0.025
β3 (kr) 16.3678 0.0272 0.818 1.000
β4 (vd) –0.9817 0.0091 –0.147 0.180

Notes.The column legend is the same as in Table A.2.

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