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Fig. 4

image

Radial [Fe/H] gradient vs. height inferred from isolating a thick disc via chemical characteristics, i.e. the high-α population. We repeat some data previously presented in Fig. 2: observational data and results from galaxy MaGICC-g15784, both indicated with the same linestyles and symbols as before. We overplot the gradients for the three high-α cuts displayed in Fig. 3 through the horizontal blue dashed lines ([O/Fe] > 0.05 dex in orange squares, [O/Fe] > 0.05 dex in blue asterisks and [O/Fe] > 0.15 dex in green diamonds) and the low-α cut ([O/Fe] < 0.05 dex in black circles).

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