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• W2077276586 endingPage "A69" @default.
• W2077276586 startingPage "A69" @default.
• W2077276586 abstract "We find that hot jupiter host stars within the T$_mathrm{eff}$ range 5900-6300K show lower Li abundances, by 0.14 dex, than stars without detected planets. This offset has a significance at the level 7$sigma$, pointing to a stronger effect of planet formation on Li abundances when the planets are more massive and migrate close to the star. However, we also find that the average v textit{sin}i of (a fraction of) stars with hot jupiters is higher on average than for single stars in the same T$_mathrm{eff}$ region, suggesting that rotationally-induced mixing (and not the presence of planets) might be the cause for a greater depletion of Li. We confirm that the mass-metallicity dependence of the Li dip is extended towards [Fe/H] $sim$ 0.4 dex (beginning at [Fe/H] $sim$ -0.4 dex for our stars) and that probably reflects the mass-metallicity correlation of stars of the same T$_mathrm{eff}$ on the Main Sequence. We find that for the youngest stars ($<$ 1.5 Gyr) around the Li dip, the depletion of Li increases with v textit{sin}i values, as proposed by rotationally-induced depletion models. This suggests that the Li dip consists of fast rotators at young ages whereas the most Li-depleted old stars show lower rotation rates (probably caused by the spin-down during their long lifes). We have also explored the Li evolution with [Fe/H] taking advantage of the metal-rich stars included in our sample. We find that Li abundance reaches its maximum around solar metallicity but decreases in the most metal-rich stars, as predicted by some models of Li Galactic production." @default.
• W2077276586 created "2016-06-24" @default.
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• W2077276586 date "2015-04-01" @default.
• W2077276586 modified "2023-09-27" @default.
• W2077276586 title "Li abundances in F stars: planets, rotation, and Galactic evolution" @default.
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• W2077276586 doi "https://doi.org/10.1051/0004-6361/201425433" @default.
• W2077276586 hasPublicationYear "2015" @default.
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