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On the Detection of Cyanocoronene in the ISM
G. Wenzel, S. Gong, C. Xue, P. B. Changala, M. S. Holdren, T. H. Speak, D. A. Stewart, Z. T. P. Fried, R. H. J. Willis, E. A. Bergin, A. M. Burkhardt, A. N. Byrne, S. B. Charnley, A. Lipnicky, R. A. Loomis, C. N. Shingledecker, I. R. Cooke, M. C. McCarthy, A. J. Remijan, A. E. Wendlandt, and B. A. McGuire
a<nnounced the
Discovery of the Seven-ring Polycyclic Aromatic Hydrocarbon Cyanocoronene (C<sub>24</sub>H<sub>11</sub>CN) in GOTHAM Observations of TMC-1
Astrophys. J. Lett. 984, Art. No. L36 (2025).
The molecule was identified in the course of the GOTHAM survey of TMC-1 carried out with the 100 m GBT dish. Several oblate paired a-type rotational transitions with 31 ≤ J ≤ 37 and Kc close to J. Each pair of lines is close to the noise limit, but stacking achieves a S/N of about 7. The derived column density is, for example, about twice that of each of 1- and 2-cyanonaphtalene and only slightly less than that of benzonitrile.
Contributor(s): H. S. P. Müller; 05, 2025