Chemical Evolution of Mg Isotopes versus the Time Variation of the Fine Structure Constant

T. Ashenfelter, Grant J. Mathews, Keith A. Olive

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41 Scopus citations

Abstract

The low-z subset of the many-multiplet data from quasar absorption systems was explained using the isotopic ratios produced by the synthesis of 25,26Mg at the base of the convective envelope in low-metallicity asymptotic giant branch stars. A model based on plausible expectations of stellar and galactic evolution was presented. Huge amounts of neutron-rich Mg isotopes were observed in metal-poor globular-cluster stars. The results show that the quasar absorption spectra may be the source of information on the nucleosynthetic history of such systems.

Original languageEnglish (US)
Article number041102
Pages (from-to)411021-411024
Number of pages4
JournalPhysical Review Letters
Volume92
Issue number4
DOIs
StatePublished - Jan 30 2004

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