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Table 5.

Average abundances of CN, Al, and other proton-capture elements in the five groups in NGC 2808.

Group n [Al/Fe] rms n [CN/Fe] rms
P1 39 −0.114 ± 0.023 0.141 33 −0.283 ± 0.014 0.082
P2 28 +0.206 ± 0.032 0.168 22 −0.221 ± 0.017 0.078
I1 16 +0.782 ± 0.097 0.387 12 −0.136 ± 0.028 0.098
I2 10 +1.136 ± 0.030 0.095 8 −0.114 ± 0.035 0.100
E 15 +1.292 ± 0.029 0.113 14 −0.017 ± 0.017 0.101
Group n [O/Fe] rms n [Na/Fe] rms
P1 42 +0.308 ± 0.009 0.058 46 −0.005 ± 0.010 0.067
P2 35 +0.154 ± 0.015 0.090 40 +0.188 ± 0.011 0.068
I1 15 −0.216 ± 0.032 0.124 21 +0.378 ± 0.007 0.034
I2 7 −0.447 ± 0.082 0.217 12 +0.414 ± 0.021 0.072
E 17 −0.656 ± 0.039 0.161 20 +0.592 ± 0.025 0.112
Group n [Mg/Fe] rms n [Si/Fe] rms
P1 46 +0.384 ± 0.006 0.041 46 +0.265 ± 0.004 0.026
P2 40 +0.346 ± 0.006 0.035 40 +0.262 ± 0.004 0.026
I1 21 +0.274 ± 0.010 0.044 21 +0.309 ± 0.006 0.026
I2 12 +0.127 ± 0.008 0.028 12 +0.346 ± 0.011 0.038
E 20 −0.050 ± 0.011 0.050 20 +0.390 ± 0.008 0.036

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