Toward an understanding of the systematic uncertainties in deriving the primordial helium abundance from H II region observations

Evan D. Skillman, Elena Terlevich, Roberto Terlevich

    Research output: Contribution to journalArticle

    16 Scopus citations

    Abstract

    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 languageEnglish (US)
    Pages (from-to)105-114
    Number of pages10
    JournalSpace Science Reviews
    Volume84
    Issue number1-2
    StatePublished - Dec 1 1998

    Keywords

    • Big Bang Nucleosynthesis
    • H II Region Abundances
    • Primordial Helium

    Fingerprint Dive into the research topics of 'Toward an understanding of the systematic uncertainties in deriving the primordial helium abundance from H II region observations'. Together they form a unique fingerprint.

  • Cite this