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Table 6

Elemental abundances.

Element SMC N77 Mean SMC LMC N191 Mean LMC

He/H 0.079 0.081 0.070 0.089
O/H ( ×  104) 1.04 1.07 2.0 2.24
N/H ( ×  106) 3.85 4.27 8.58 13.8
Ne/H ( ×  105) 1.34 1.86 1.09 4.07

Notes. See Sect. 3.5 for uncertainties.

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