Stellar yields and abundances: New directions from planetary nebulae

Maria Lugaro, Amanda I. Karakas, Marco Pignatari, Carolyn L. Doherty

Research output: Contribution to journalArticleResearch

Abstract

Planetary nebulae retain the signature of the nucleosynthesis and mixing events that occurred during the previous AGB phase. Observational signatures complement observations of AGB and post-AGB stars and their binary companions. The abundances of the elements heavier than iron such as Kr and Xe in planetary nebulae can be used to complement abundances of Sr/Y/Zr and Ba/La/Ce in AGB stars, respectively, to determine the operation of the slow neutron-capture process (the s process) in AGB stars. Additionally, observations of the Rb abundance in Type I planetary nebulae may allow us to infer the initial mass of the central star. Several noble gas components present in meteoritic stardust silicon carbide (SiC) grains are associated with implantation into the dust grains in the high-energy environment connected to the fast winds from the central stars during the planetary nebulae phase.

Original languageEnglish
Pages (from-to)86-94
Number of pages9
JournalProceedings of the International Astronomical Union
Volume12
Issue numberS323
DOIs
Publication statusPublished - 1 Oct 2016

Keywords

  • Abundances
  • Nuclear reactions
  • Nucleosynthesis
  • Stars: Abundances
  • Stars: Agb and post-Agb
  • Stars: Chemically peculiar

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