Recent determinations of the primordial He abundance have given significantly different results. We are attempting to identify some of the causes of these differences and propose observational solutions. Here we identify a systematic difference in how the data are interpreted (differences in corrections for the presence of neutral helium) and the importance of a systematic bias towards lower derived helium abundances (underestimating the presence of underlying stellar absorption).
|Original language||English (US)|
|Number of pages||10|
|Journal||Space Science Reviews|
|State||Published - Dec 1 1998|
- Big Bang Nucleosynthesis
- H II Region Abundances
- Primordial Helium