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The Dawes Review 2: Nucleosynthesis and Stellar Yields of Low- and Intermediate-Mass Single Stars
Karakas, Amanda I.; Lattanzio, John C.
AA(Research School of Astronomy & Astrophysics, Australian National University, Canberra, ACT 2611, Australia), AB(Monash Centre for Astrophysics, School of Mathematical Sciences, Monash University, Clayton, VIC 3800, Australia)
Publications of the Astronomical Society of Australia, Volume 31, id.e030 62 pp. (PASA Homepage)
Publication Date:
Astronomy Keywords:
ISM: composition, nucleosynthesis, Population II stars, stars: AGB and post-AGB, stars: mixing, chemical evolution
Abstract Copyright:
2014: Astronomical Society of Australia
Bibliographic Code:


The chemical evolution of the Universe is governed by the chemical yields from stars, which in turn are determined primarily by the initial stellar mass. Even stars as low as 0.9 M&sun; can, at low metallicity, contribute to the chemical evolution of elements. Stars less massive than about 10 M&sun; experience recurrent mixing events that can significantly change the surface composition of the envelope, with observed enrichments in carbon, nitrogen, fluorine, and heavy elements synthesized by the slow neutron capture process (the s-process). Low- and intermediate-mass stars release their nucleosynthesis products through stellar outflows or winds, in contrast to massive stars that explode as core-collapse supernovae. Here we review the stellar evolution and nucleosynthesis for single stars up to ~ 10 M&sun; from the main sequence through to the tip of the asymptotic giant branch (AGB). We include a discussion of the main uncertainties that affect theoretical calculations and review the latest observational data, which are used to constrain uncertain details of the stellar models. We finish with a review of the stellar yields available for stars less massive than about 10 M&sun; and discuss efforts by various groups to address these issues and provide homogeneous yields for low- and intermediate-mass stars covering a broad range of metallicities.
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