Lithium in metal-poor red giants

Astronomy and Astrophysics – Astronomy

Scientific paper

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Stars: Abundances, Population Ii, Late-Type, Binaries: Spectroscopic, Stars: Individual (Hd 30443, Hd 187216, Hd 209621, Hd 218732, Hd 232078)

Scientific paper

The lithium abundance was calculated for five metal-poor red giant stars
from Li i doublet at 6707 Å by fitting the observed
high-resolution spectra with synthetic spectra. The lithium abundance
was found to be low in all stars, logɛ(Li) ≤ 1.8, confirming
lithium depletion on the red giant and asymptotic giant branch.

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