Table 4: Mean values for the equivalent line widths for the stars in common with Ramírez et al. (2000).
this work Ramírez et al. (2000) Ramírez et al. (2000)

after rebinning

Na I $3.55 \pm 0.45$ $4.13 \pm 0.54$ $3.95 \pm 0.78$

Ca I $2.62 \pm 0.20$ $3.13 \pm 0.48$ $2.77 \pm 0.47$

**Table 4:** Mean values for the equivalent line widths for the stars in common with Ramírez et al. (2000).
	this work	Ramírez et al. (2000)	Ramírez et al. (2000)
			after rebinning
Na I	$3.55 \pm 0.45$	$4.13 \pm 0.54$	$3.95 \pm 0.78$
Ca I	$2.62 \pm 0.20$	$3.13 \pm 0.48$	$2.77 \pm 0.47$

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