The Chemical Evolution of Magnesium Isotopic Abundances in the Solar Neighbourhood
Open accessAbstract
Abstract The abundance of the neutron-rich magnesium isotopes observed in metal-poor stars is explained quantitatively with a chemical evolution model of the local Galaxy that considers — for the first time — the metallicity-dependent contribution from intermediate mass stars. Previous models that simulate the variation of Mg isotopic ratios with metallicity in the solar neighbourhood have attributed the production of 25Mg and 26Mg exclusively to hydrostatic burning in massive stars. These models match the data well for [Fe/H] > –1.0 but severely underestimate 25,26Mg/24Mg at lower metallicities. Earlier studies have noted that this discrepancy may indicate a significant role played by intermediate mass stars. Only recently have detailed calculations of intermediate mass stellar yields of 25Mg and 26Mg become available with which to test this hypothesis. In an extension of previous work, we present a model that successfully matches the Mg isotopic abundances in nearby Galactic disk stars through the incorporation of nucleosynthesis predictions of Mg isotopic production in asymptotic giant branch stars.
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Fenner et al. (2003) found that the contribution of AGB stars was essential to explain the Mg isotopic ratios observed in cool evolved field stars.
“Fenner et al. (2003) found that the contribution of AGB stars was essential to explain the Mg isotopic ratios observed in cool evolved field stars (Gay & Lambert 2000; Yong et al. 2003b).”
From The Dawes Review 2: Nucleosynthesis and Stellar Yields of Low- and Intermediate-Mass Single Stars (2014) · cites this paper as Fenner et al. (2003)
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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
“Fenner et al. (2003) found that the contribution of AGB stars was essential to explain the Mg isotopic ratios observed in cool evolved field stars (Gay & Lambert 2000; Yong et al. 2003b).”
BackgroundSelf-citationConstraining Variationsin the Fine-Structure Constant, Quark Massesand the Strong Interaction
Murphy, M. T., Flambaum, V. V., Webb, J. K., Dzuba, V. V., Prochaska, J. X., & Wolfe, A. M. (2004) · Lecture Notes in Physics · doi:10.1007/978-3-540-40991-5_9 · Cited by 116 · see citing works
Chemical Evolution of Mg Isotopes versus the Time Variation of the Fine Structure Constant
Ashenfelter, T., Mathews, G. J., & Olive, K. A. (2004) · Physical Review Letters · doi:10.1103/physrevlett.92.041102 · Cited by 54 · see citing works
On variations in the fine-structure constant and stellar pollution of quasar absorption systems
Fenner, Y., Murphy, M. T., & Gibson, B. K. (2005) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2005.08781.x · Cited by 41 · see citing works
Self-citation
- Authors
- Fenner, Y., Gibson, B. K., Lee, H.-C., Karakas, A. I., Lattanzio, J. C., Chieffi, A., Limongi, M., & Yong, D.
- Affiliations
- University of California, Santa Cruz (US)
- Swinburne University of Technology (AU)
- Monash University (AU)
- Astronomical Observatory of Rome (IT)
- The University of Texas at Austin (US)
- Corresponding author
- Fenner, Y.
- Venue
- Publications of the Astronomical Society of Australia
- Publisher
- Cambridge University Press (CUP)
- Published
- 2003
- Volume
- 20
- Issue
- 4
- Pages
- 340-344
- ISSN
- 1323-3580 (ISSN-L)
- 1448-6083
- OpenAlex
- W2169857182
- Cited by
- 50
- References
- 0
- Citations by year
- 2025: 1 · 2024: 1 · 2022: 2 · 2021: 3 · 2020: 2 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 1 · 2015: 1 · 2014: 5 · 2013: 2 · 2012: 1
- FWCI
- 2.70
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Publications of the Astronomical Society of Australia (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- ANU Open Research (Australian National University) (submittedVersion)
- Swinburne figshare (Swinburne University of Technology) (submittedVersion)
- arXiv (Cornell University)
- Funders
- Australian Research Council
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Gamma-ray bursts and supernovae
- Keywords
- magnesium isotopes, 25Mg, 26Mg, 24Mg, neutron-rich nuclei, chemical evolution, metal-poor stars, intermediate-mass stars, asymptotic giant branch, stellar nucleosynthesis, stellar yields, Galactic disk, solar neighborhood, metallicity dependence
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