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Table 1

Atmospheric parameters and derived chemical abundances for stars in our sample.

[Fe/H]a [α/Fe]a Star K (mag) Teff (K) log   (g)  (cm s-2) Vmicro (km s-1) [Fe/H]c [Na/Fe] A(F)b [F/Fe]
Arcturus –0.52 +0.31 4286 1.66 1.74 –0.50 +0.23c 4.16 +0.10c
47 Tuc –0.76 +0.3 #41806 7.36 3500 0.1 2.6 –0.98 +0.01c 3.15 –0.43c
#68261 7.93 3800 0.6 2.3 –0.90 +0.23c 3.4 –0.26c
#56265 8.49 3880 0.8 2.3 –0.80 +0.13c 3.5 –0.26c
#68039 8.78 4015 1.0 2.1 –0.90 +0.53c <3.5 <–0.16c
#38841 8.93 4015 1.0 2.1 –0.90 +0.23c 3.5 –0.16c
#86622 8.99 4020 1.0 2.1 –0.95 +0.43c 3.6 –0.11c
M 4 –1.18 +0.4 #45330 8.16 4145 1.3 2.0 –1.10 +0.03c 3.4 –0.06c
#38229 9.28 4360 1.8 1.9 +0.31d <4.0 <+0.62d
#39797 10.07 4375 2.1 1.8 +0.11d <4.0 <+0.62d
NGC 6397 –1.99 +0.4 #73589 7.89 4490 1.2 1.7 <–1.5 +0.12d <3.0 <+0.43d
#73212 8.43 4565 1.4 1.7 <–1.5 <–0.08d <3.3 <+0.73d
#51362 8.52 4640 1.5 1.6 <–1.5 +0.02d <3.5 <+0.93d
#52830 8.54 4630 1.5 1.6 +0.12d <3.7 <+1.13d
M 30 –2.33 +0.4 #3998 8.86 4150 0.5 2.0 +0.16d <2.6 <+0.37d
#7640 9.77 4445 0.9 1.8 +0.46d <3.2 <+0.97d

Notes.

(a)

These columns refer to the mean [Fe/H] ratios of each cluster (Carretta et al. 2009) and the corresponding [α/Fe]  ratios as seen in most galactic stars for a given [Fe/H]. For Arcturus, the stellar parameters and [α/Fe] are from Ramírez & Meléndez (2005).

(b)

For the chemical abundances, we use the classical relation A(F) = log     [n(F)/n(H)]  + 12. The adopted F solar abundance is 4.56.

(c)

These chemical ratios are computed with the iron abundance measured with the FeI line at 2.3308 μm. The adopted Na and Fe solar abundances are 6.17 and 7.45, respectively.

(d)

These chemical ratios are computed with the mean iron abundance of each cluster given in Col. 2.

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