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A barium-rich binary central star in Abell 70
Published online by Cambridge University Press: 30 August 2012
Abstract
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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.
Keywords
- Type
- Contributed Papers
- Information
- Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 314 - 315
- Copyright
- Copyright © International Astronomical Union 2012
References
Jones, D., Tyndall, A. A., Huckvale, L., Prouse, B., & Lloyd, M.
2011, arXiv:1106.1102Google Scholar
Miszalski, B., Boffin, H. M. J., Frew, D. J., et al.
2011, MNRAS, in press, arXiv:1108.3957Google Scholar
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