Table 3: Abundance ratios in different Galactic components.
  (1) (2) (3) (4) (5)
N 16 11 35 31 4
$\rm [\alpha/Fe] $ 0.14 0.06 0.06 0.02 0.08
$\rm [\alpha/Fe]_\sigma $ 0.09 0.03 0.04 0.03 0.05
$\rm [Na/Fe] $ 0.06 0.03 0.05 0.00 -
$\rm [Na/Fe]_\sigma $ 0.04 0.08 0.04 0.07 -
$\rm [Y/Fe] $ 0.00a -0.11b 0.11c 0.04 -0.06
$\rm [Y/Fe]_\sigma $ 0.24 0.14 0.58 0.10 0.03
(1) Thick disc   $\rm -0.5\le [Fe/H]< -0.2$.
(2) Thick disc   $\rm -0.2 \le [Fe/H]$.
(3) Thin disc   $\rm -0.5\le [Fe/H]< -0.2$.
(4) Thin disc   $\rm -0.2 \le [Fe/H]$.
(5) Halo   $\rm -0.5\le [Fe/H]$.
a 8 stars; b 5 stars; c 28 stars.

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