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

Abstract

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
Pages314-315
Number of pages2
Volume7
EditionS283
DOIs
Publication statusPublished - Jul 2011

Publication series

NameProceedings of the International Astronomical Union
NumberS283
Volume7
ISSN (Print)17439213
ISSN (Electronic)17439221

Keywords

  • 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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