Analysis of the moderately Li-rich giant HD 146850.

Astronomy and Astrophysics – Astrophysics

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Stars: Abundances, Hd 146850

Scientific paper

We report the identification of 3 Li-rich giants discovered in an ongoing survey based on IRAS colours. A detailed analysis of one of these, HD 146850, is presented here. High-resolution spectra were obtained for this star, using CASPEC at the 3.6m telescope of ESO. We derived the stellar parameters (T_eff_, log g, [M/H])=4000, 1.5, -0.3. A lithium abundance of ɛ(Li)=1.6 is found, whereas [C/Fe]~0.0 and [N/Fe]~-0.1 indicating that no convective mixing has occurred. The abundances of oxygen [O/Fe]=~+0.1 and α-elements [Mg/Fe]=[Ti/Fe]=[Ca/Fe]=~0.0 suggest that we are dealing with a disk star, for which the radial velocity v_r_=42km/s is also moderate.

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