Abundances of Iron-Group Elements in Planetary Nebulae and Consequences for Chemical Enrichment

Autor:	T. R. Geballe, Nicholas C. Sterling, H. L. Dinerstein
Rok vydání:	2016
Předmět:	Physics Nuclear reaction Iron group Space and Planetary Science Nucleosynthesis Astronomy and Astrophysics Planetary nebula Astrobiology
Zdroj:	Proceedings of the International Astronomical Union. 12:82-85
ISSN:	1743-9221 1743-9213
DOI:	10.1017/s1743921317000631
Popis:	We have developed a method for determining elemental Fe-group abundances in planetary nebulae using an infrared emission line of Zn, the least refractory Fe-group species. Many planetary nebulae, particularly those of the Milky Way’s thick disk and bulge, display subsolar [Fe/H] (as inferred from Zn) although their abundances of α elements such as O, S, and Ar are nearly solar. We discuss the implications for determining enhancements of species synthesized by the progenitor star during the AGB (e.g.,s-process products), and for galactic chemical evolution in view of the metallicity dependence of AGB nucleosynthetic yields.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d8bf9897e9a03ee6a8dafbcea626d794 https://doi.org/10.1017/s1743921317000631 Zobrazit plný text záznamu