Fig. 39

Ratio of WR over O stars vs. time.
Star-formation law: instantaneous.

M = 106 M
Mlow = 1 M

Z=0.040

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Z=0.020

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Z=0.008

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Z=0.004

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Z=0.001

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Solid line:
= 2.35, Mup = 100 M

Long-dashed line:
= 3.30, Mup = 100 M

Short-dashed line:
= 2.35, Mup = 30 M