Population II 6Li as a probe of nucleosynthesis and stellar structure and evolution

Gary Steigman; Brian D. Fields; Keith A. Olive; David N. Schramm; Terry P. Walker

doi:10.1086/187026

Population II ⁶Li as a probe of nucleosynthesis and stellar structure and evolution

Gary Steigman, Brian D. Fields, Keith A. Olive, David N. Schramm, Terry P. Walker

Research output: Contribution to journal › Article › peer-review

Abstract

We discuss the importance of Population II ⁶Li as a diagnostic for models of primordial nucleosynthesis, cosmic-ray nucleosyntheses in the early Galaxy, and the structure and evolution of metal-poor solar-type stars. The observation of ⁶Li in the subdwarf HD 84937 is shown to be consistent with the existing Population II LiBeB data within the context of a simple three-component model: (1) standard big bang nucleosynthesis, (2) Population II cosmic-ray nucleosynthesis, (3) standard (nonrotating) stellar LiBeB depletion. If this interpretation is correct, we predict a potentially detectable boron abundance for this star: B/H ∼2 × 10^-12. Subsequent Population II LiBeB observations, and in particular further observations of Population II ⁶Li, are shown to be crucial to our understanding of the primordial and early galactic creation and destruction mechanisms for light elements.

Original language	English (US)
Pages (from-to)	L35-L38
Journal	Astrophysical Journal
Volume	415
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/187026
State	Published - Sep 20 1993
Externally published	Yes

Keywords

Galaxies: abundances
Nuclear reactions, nucleosynthesis, abundances
Stars: abundances

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Online availability

10.1086/187026

Library availability

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Cite this

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title = "Population II 6Li as a probe of nucleosynthesis and stellar structure and evolution",

abstract = "We discuss the importance of Population II 6Li as a diagnostic for models of primordial nucleosynthesis, cosmic-ray nucleosyntheses in the early Galaxy, and the structure and evolution of metal-poor solar-type stars. The observation of 6Li in the subdwarf HD 84937 is shown to be consistent with the existing Population II LiBeB data within the context of a simple three-component model: (1) standard big bang nucleosynthesis, (2) Population II cosmic-ray nucleosynthesis, (3) standard (nonrotating) stellar LiBeB depletion. If this interpretation is correct, we predict a potentially detectable boron abundance for this star: B/H ∼2 × 10-12. Subsequent Population II LiBeB observations, and in particular further observations of Population II 6Li, are shown to be crucial to our understanding of the primordial and early galactic creation and destruction mechanisms for light elements.",

keywords = "Galaxies: abundances, Nuclear reactions, nucleosynthesis, abundances, Stars: abundances",

author = "Gary Steigman and Fields, {Brian D.} and Olive, {Keith A.} and Schramm, {David N.} and Walker, {Terry P.}",

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T1 - Population II 6Li as a probe of nucleosynthesis and stellar structure and evolution

AU - Steigman, Gary

AU - Fields, Brian D.

AU - Olive, Keith A.

AU - Schramm, David N.

AU - Walker, Terry P.

PY - 1993/9/20

Y1 - 1993/9/20

N2 - We discuss the importance of Population II 6Li as a diagnostic for models of primordial nucleosynthesis, cosmic-ray nucleosyntheses in the early Galaxy, and the structure and evolution of metal-poor solar-type stars. The observation of 6Li in the subdwarf HD 84937 is shown to be consistent with the existing Population II LiBeB data within the context of a simple three-component model: (1) standard big bang nucleosynthesis, (2) Population II cosmic-ray nucleosynthesis, (3) standard (nonrotating) stellar LiBeB depletion. If this interpretation is correct, we predict a potentially detectable boron abundance for this star: B/H ∼2 × 10-12. Subsequent Population II LiBeB observations, and in particular further observations of Population II 6Li, are shown to be crucial to our understanding of the primordial and early galactic creation and destruction mechanisms for light elements.

AB - We discuss the importance of Population II 6Li as a diagnostic for models of primordial nucleosynthesis, cosmic-ray nucleosyntheses in the early Galaxy, and the structure and evolution of metal-poor solar-type stars. The observation of 6Li in the subdwarf HD 84937 is shown to be consistent with the existing Population II LiBeB data within the context of a simple three-component model: (1) standard big bang nucleosynthesis, (2) Population II cosmic-ray nucleosynthesis, (3) standard (nonrotating) stellar LiBeB depletion. If this interpretation is correct, we predict a potentially detectable boron abundance for this star: B/H ∼2 × 10-12. Subsequent Population II LiBeB observations, and in particular further observations of Population II 6Li, are shown to be crucial to our understanding of the primordial and early galactic creation and destruction mechanisms for light elements.

KW - Galaxies: abundances

KW - Nuclear reactions, nucleosynthesis, abundances

KW - Stars: abundances

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