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- W2076378519 abstract "The pre-galactic (assumed primordial) helium mass fraction Y p is determined to be 0.228 ± 0.005 (s.e.) or Y p < 0.242 with 95 per cent confidence, taking reasonably likely systematic errors into account. This is based on INT and AAT observations of emission lines from H II galaxies combined with selected data from the literature relating to extragalactic H II regions in general, discussed in a consistent analysis taking into account the known corrections and likely sources of error" @default.
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- W2076378519 date "1992-03-15" @default.
- W2076378519 modified "2023-10-16" @default.
- W2076378519 title "The primordial helium abundance from observations of extragalactic H II regions" @default.
- W2076378519 doi "https://doi.org/10.1093/mnras/255.2.325" @default.
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