Relative stellar mass growth of six spatial components, including 0–0.9 kpc (dotted lines), 0.9–1.8 kpc (dot-dashed lines), 1.8–2.7 kpc (dashed lines), 2.7–3.6 kpc (long dot-dashed lines), 3.6–4.5 kpc (long dashed lines), and 4.5–5.4 kpc (solid lines).The stellar masses in the different components are normalized to their corresponding present-day values. The observations are from Fig. 6 of Gogarten et al. (2010), and the data have been offset from one another to avoid overlapping error bars.