C${}_{60}$ in Reflection Nebulae

Kris Sellgren, Michael W. Werner, James G. Ingalls +3

The fullerene C${}_{60}$ has four infrared-active vibrational transitions at 7.0, 8.5, 17.4 and 18.9 $\mu$m. We have previously observed emission features at 17.4 and 18.9 $\mu$m in the…