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Home All issues Volume 496 / No 3 (March IV 2009) A&A, 496 3 (2009) 841-853 Full HTML
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Table 3:

Mean abundances (excluding upper limits) for each metallicity region given on the scale 12+$\log$[X/H]1. Solar and H II region abundances are given for comparison.

Species		 Solar2 Galaxy LMC SMC
    B-stars H II regions3 B-stars H II regions4 B-stars H II regions4

Carbon5		 8.39 8.00 $\pm$ 0.19 (56) - 7.70 $\pm$ 0.19 (132) 7.81 $\pm$ 0.22 7.30 $\pm$ 0.28 (81) 7.20 $\pm$ 0.02
Nitrogen6 7.78 7.62 $\pm$ 0.12 (45) 7.57 $\pm$ 0.30 7.13 $\pm$ 0.29 ( 83) 6.92 $\pm$ 0.14 7.24 $\pm$ 0.31 (36) 6.56 $\pm$ 0.07
Oxygen 8.66 8.63 $\pm$ 0.16 (54) 8.70 $\pm$ 0.30 8.34 $\pm$ 0.13 (133) 8.37 $\pm$ 0.09 7.99 $\pm$ 0.21 (80) 8.02 $\pm$ 0.04
Magnesium 7.53 7.25 $\pm$ 0.17 (52)   7.05 $\pm$ 0.14 (134)   6.72 $\pm$ 0.18 (72)  
Silicon 7.51 7.42 $\pm$ 0.07 (56)   7.17 $\pm$ 0.10 (135)   6.77 $\pm$ 0.09 (88)  
1 Values in brackets indicate the number of stars for which abundances were estimated.
2 Asplund et al. (2005).
3 Average of solar neighbourhood regions from Shaver et al. (1983).
4 Kurt & Dufour (1998).
5 The carbon abundances have been corrected, see text.
6 Supergiants have been excluded from the mean nitrogen abundances.

Source LaTeX | All tables | In the text

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