tokens: ACKNOWLEDGEMENTS The authors are very grateful to Bruce Draine and Joseph Weingartner for their valuable and rapid answers to questions regarding their work on the silicate–graphite–PAH dust model. We also thank Simone Bianchi and Andrea Ferrara for their insightful comments on the manuscript. Finally, we would like express our gratitude to the anonymous referee for reading the manuscript with great care and for providing challenging comments that resulted in a constructive discussion and substantial improvements.
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