A barium-rich binary central star in Abell 70

Henri M J Boffin*, Brent Miszalski, David J. Frew, Agnes Acker, Joachim Köppen, Anthony F J Moffat, Quentin A. Parker

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution


    We have found the central star of Abell 70 (PN G038.1-25.4, hereafter A 70) to be a binary consisting of a G8 IV-V secondary and a hot white dwarf. The secondary shows enhanced Ba II and Sr II features, firmly classifying it as a barium star. The nebula is found to have Type-I chemical abundances with helium and nitrogen enrichment, which combined with future abundance studies of the central star, will establish A 70 as a unique laboratory for studying s-process AGB nucleosynthesis.

    Original languageEnglish
    Title of host publicationPlanetary Nebulae: An Eye to the Future
    EditorsArturo Manchado, Letizia Stanghellini, Detlef Schönberner
    Place of PublicationCambridge, UK
    Number of pages2
    Publication statusPublished - Jul 2011

    Publication series

    NameProceedings of the International Astronomical Union
    ISSN (Print)17439213
    ISSN (Electronic)17439221


    • binaries: general
    • binaries: symbiotic
    • planetary nebulae: general
    • planetary nebulae: individual (PN G038.1-25.4)
    • stars: AGB and post-AGB
    • stars: chemically peculiar


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