The halo lithium plateau: Outstanding issues

Ryan, S. G. and Elliott, L. (2006). The halo lithium plateau: Outstanding issues. In: Randich, S. and Pasquini, L. eds. Chemical Abundances and Mixing in Stars in the Milky Way and its Satellites. ESO Astrophysics Symposia (XXIV). Berlin: Springer, pp. 185–190.



We examine outstanding issues in the analysis and interpretation of the halo Li plateau. We show that the majority of very Li-poor halo Li-plateau stars (5 out of 8) have high projected rotation velocities vsini between 4.7 and 10.4 km s(-1). Such stars have very different evolutionary histories to Li-normal plateau stars, and hence cannot be included in studies of Li depletion by normal halo dwarfs. Uncertainties in the effective temperature scale for metal-poor stars continue to challenge the analysis of Li.

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