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Nucleosynthesis in AGB Stars Traced by Oxygen Isotopic Ratios
Katholieke Univ Leuven, Inst Astron, Louvain, Belgium..
Katholieke Univ Leuven, Inst Astron, Louvain, Belgium.;Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1012 WX Amsterdam, Netherlands..
Chalmers, Onsala Space Observ, Dept Earth & Space Sci, S-43900 Onsala, Sweden..
Katholieke Univ Leuven, Inst Astron, Louvain, Belgium.;Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1012 WX Amsterdam, Netherlands..
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2015 (English)In: WHY GALAXIES CARE ABOUT AGB STARS III: A CLOSER LOOK IN SPACE AND TIME, ASTRONOMICAL SOC PACIFIC , 2015, Vol. 497, 289-294 p.Conference paper (Refereed)Text
Abstract [en]

Isotopic ratios are by far the best diagnostic tracers of the stellar origin of elements, as they are very sensitive to the precise conditions in the nuclear burning regions. They allow us to give direct constraints on stellar evolution models and on the progenitor mass. However, up to now different isotopic ratios have been well constrained for only a handful of Asymptotic Giant Branch (AGB) stars. We present new data on isotopologue lines of a well-selected sample of AGB stars, covering the three spectral classes of C-, S- and M-type stars. We report on the first efforts made in determining accurate isotopologue fractions, focusing on oxygen isotopes which are a crucial tracer of the poorly constrained extra mixing processes in stellar atmospheres.

Place, publisher, year, edition, pages
ASTRONOMICAL SOC PACIFIC , 2015. Vol. 497, 289-294 p.
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-294838ISI: 000371098100054OAI: oai:DiVA.org:uu-294838DiVA: diva2:938213
Conference
Conference on Why Galaxies Care About AGB Stars III: A Closer Look in Space and Time, JUL 28-AUG 01, 2014, Univ Vienna, Vienna, AUSTRIA
Available from: 2016-06-16 Created: 2016-05-27 Last updated: 2016-06-16Bibliographically approved

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