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Lithium In Population II Stars

Published online by Cambridge University Press:  30 March 2016

J.A. Thorburn
J.A. Thorburn*
Affiliation:
Yerkes Observatory, University of ChicagoP.O. Box 258, Williams Bay, WI 53191 USA

Abstract

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Since the work of Spite & Spite (1982), halo main sequence turn-off stars have usually been considered a site where Li synthesized in the Big-Bang is wholly preserved and uncontaminated by other Li sources. However, the interpretation of halo dwarf Li abundances has become more complex as new samples of halo star Li I observations have become available. Linking the Li plateau abundance identically with the cosmological Li fraction is no longer warranted. At present, observational evidence favors a scenario where most—but not all—of the plateau abundance is cosmological in origin and a non-negligible amount is contributed subsequently by Galactic nucleosynthesis; severe, uniform Li depletion is constrained but not yet completely ruled out.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 10: Highlights of Astronomy. As presented at the XXIInd General Assembly of the IAU, 1994 , 1995 , pp. 439 - 440
Copyright
Copyright © Kluwer 1995

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