Fig. 5.From: On the detections of C60 and derivatives in circumstellar environmentsThe 8.5 μm / 18.9 μm versus 7.0 μm / 18.9 μm band ratios. The symbols are the same as in Fig. 4. Note that the 7.0μm band strengths of GarcÃa-Hernández et al. (2012a) were estimated from thermal models, and thus cannot be used to argue against the fluorescence model (see the text).Back to article page