ESO 157-49 axial surface-brightness profiles for the thin-disc-dominated heights (blue circles) and the thick-disc-dominated heights (red triangles). The black continuous lines correspond to the fits to the profiles – as explained in Sect. 3.5 – and the dashed lines indicate the disc contribution. Short vertical lines indicate the break radii. Red vertical lines indicate the outermost fitted point. Green vertical lines indicate the limits of the axial bins used to create the vertical surface-brightness profiles. The horizontal line indicates the μ = 27 mag arcsec-2 level. The grey region indicates the range of estimates of thick disc contributions at thin disc dominated heights based on the methods described in Sect. 5.4.
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