Table 5
Vertical abundance gradients for Fe, Mg, Al, Si, and Ti elements measured for the RC RAVE sample divided in α-poor (top) and α-rich (bottom) sub-samples.
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| α-poor sample | |||||
| 0.0 < | Z | (kpc) ≤ 0.4 | + 0.004 ± 0.025 | + 0.025 ± 0.023 | + 0.071 ± 0.029 | −0.048 ± 0.030 | + 0.095 ± 0.023 |
| 0.4 < | Z | (kpc) ≤ 0.8 | −0.028 ± 0.028 | + 0.009 ± 0.026 | + 0.004 ± 0.033 | −0.083 ± 0.033 | + 0.103 ± 0.024 |
| 0.8 < | Z | (kpc) ≤ 1.2 | −0.085 ± 0.076 | −0.131 ± 0.064 | −0.061 ± 0.081 | −0.153 ± 0.086 | + 0.029 ± 0.062 |
| 1.2 < | Z | (kpc) < 2.0 | −0.141 ± 0.090 | −0.084 ± 0.098 | + 0.108 ± 0.143 | −0.066 ± 0.120 | −0.121 ± 0.085 |
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| α-rich sample | |||||
| 0.0 < | Z | (kpc) ≤ 0.4 | −0.312 ± 0.113 | −0.189 ± 0.114 | −0.051 ± 0.134 | −0.243 ± 0.111 | + 0.077 ± 0.129 |
| 0.4 < | Z | (kpc) ≤ 0.8 | + 0.015 ± 0.092 | −0.004 ± 0.089 | + 0.004 ± 0.115 | + 0.061 ± 0.094 | + 0.062 ± 0.104 |
| 0.8 < | Z | (kpc) ≤ 1.2 | + 0.141 ± 0.120 | + 0.192 ± 0.112 | −0.077 ± 0.174 | + 0.071 ± 0.144 | + 0.133 ± 0.125 |
| 1.2 < | Z | (kpc) < 2.0 | −0.073 ± 0.088 | −0.016 ± 0.108 | + 0.015 ± 0.130 | −0.094 ± 0.150 | + 0.072 ± 0.131 |
Notes. Only stars in the range 7.5 ≤R (kpc) < 8.5 are considered. The gradients are expressed as dex kpc-1 for four ranges of | Z |. Uncertainties of 68% confidence are obtained with the bootstrap method and represent the internal errors.
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