Fig. 4
Size-luminosity relation. The sizes are in log-scale. Purple points are pAGB binaries from this work. Purple open circles are pAGB binaries with Tring > 7000 K. Light blue points are Herbig Ae/Be stars from Lazareff et al. (2017). The blue and orange resp. dashed lines are the theoretical sublimation radius for Tsub = 1500 K and Tsub = 1000 K resp.
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