Nucleosynthesis of Light-Element Isotopes in Evolved Stars Experiencing Extended Mixing
Open accessAbstract
We present computations of nucleosynthesis in red giants and Asymptotic Giant Branch (AGB) stars of Population I experiencing extended mixing. The assumed physical cause for mass transport is the buoyancy of magnetized structures, according to recent suggestions. The peculiar property of such a mechanism is to allow for both fast and slow mixing phenomena, as required for reproducing the spread in Li abundances displayed by red giants and as discussed in an accompanying paper. We explore here the effects of this kind of mass transport on CNO and intermediate-mass nuclei and compare the results with the available evidence from evolved red giants and from the isotopic composition of presolar grains of AGB origin. It is found that a good general accord exists between predictions and measurements; in this framework we also show which type of observational data best constrains the various parameters. We conclude that magnetic buoyancy, allowing for mixing at rather different speeds, can be an interesting scenario to explore for explaining together the abundances of CNO nuclei and of Li.
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The evidence for deep mixing on the AGB comes mainly from O and Al isotope ratios measured in pre-solar oxide grains, which support the existence of extra mixing in low-mass (M ≲ 1.3 M⊙) AGB stars.
“The evidence for deep mixing on the AGB comes mainly from O and Al isotope ratios measured in pre-solar oxide grains, which support the existence of such extra mixing in low-mass ( M ≲ 1 . 3 M ⊙ ) AGB stars (Busso et al. 2010; Palmerini et al. 2009, 2011).”
From The Dawes Review 2: Nucleosynthesis and Stellar Yields of Low- and Intermediate-Mass Single Stars (2014) · cites this paper as Palmerini et al. 2009
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The Dawes Review 2: Nucleosynthesis and Stellar Yields of Low- and Intermediate-Mass Single Stars
Karakas, A. I., & Lattanzio, J. C. (2014) · Publications of the Astronomical Society of Australia · doi:10.1017/pasa.2014.21 · Cited by 735 · see citing works
“…calculations within a similar paradigm are provided by Boothroyd et al. (1994), Boothroyd et al. (1995), Wasserburg et al. (1995), Langer & Hoffman (1995), Sackmann & Boothroyd (1999), Nollett et al. (2003), Denissenkov & Tout (2000), Denissenkov et al. (2006), and Palmerini et al. (2009).”
Method
- Authors
- Palmerini, S., Busso, M., Maiorca, E., & Guandalini, R.
- Affiliations
- University of Perugia (IT)
- Corresponding author
- Palmerini, S.
- Venue
- Publications of the Astronomical Society of Australia
- Publisher
- Cambridge University Press (CUP)
- Published
- 2009
- Volume
- 26
- Issue
- 3
- Pages
- 161-167
- ISSN
- 1323-3580 (ISSN-L)
- 1448-6083
- OpenAlex
- W2005865955
- Cited by
- 31
- References
- 0
- Citations by year
- 2026: 1 · 2025: 3 · 2022: 1 · 2021: 3 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 4 · 2014: 1 · 2013: 3 · 2012: 2
- FWCI
- 1.85
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Publications of the Astronomical Society of Australia (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- Nuclear Physics
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Nuclear physics research studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
- Keywords
- nucleosynthesis, red giants, asymptotic giant branch stars, Population I stars, magnetic buoyancy, mass transfer, lithium abundance, medium-mass nuclei, presolar grains, stellar evolution
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