Lithium in the most extreme halo stars - Trends with metallicity

Details Lithium in the most extreme halo stars - Trends with metallicity Lithium in the most extreme halo stars - Trends with metallicity

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...370l..89d&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 370, April 1, 1991, p. L89-L93.

Astronomy and Astrophysics

Astrophysics

22

Abundance, Metallicity, Stellar Evolution, Stellar Interiors, Stellar Mass, A Stars, Cool Stars, Line Spectra, Lithium, Stellar Spectra

Scientific paper

A grid of extremely metal-poor stellar evolutionary tracks (Z = 0.00001) is constructed to compare the predicted lithium abundance depletion to observations of the lithium abundance in correspondingly metal-poor stars (Fe/H = -3.3), and, combined with an earlier work to investigate trends of lithium isochrones with metal abundance. Lithium abundances in the most extreme halo stars hint at the possibility of small downward slope toward lower T(eff) in the flat Li-T(eff) relation (the Spite lithium plateau) observed in slightly less extreme stars; the models also predict this. In the cool star region of the Li-T(eff) plane, higher metallicity lithium isochromes are cooler at fixed lithium abundance, consistent with the observations. Current data thus agree well with the lithium trends from standard model.

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