Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ===== On the Detection of Benzonitrile, c-C6H5CN, in the ISM ===== B. A. McGuire, A. M. Burkhardt, S. V. Kalenskii, C. N. Shingledecker, A. J. Remijan, E. Herbst, and M. C. McCarthy\\ reported on the\\ **[[https://doi.org/10.1126/science.aao4890|Detection of the Aromatic Molecule Benzonitrile, //c//-C<sub>6</sub>H<sub>5</sub>CN, in the Interstellar Medium]]**\\ //Science// **359**, 202–205 (2018).\\ The molecule, also known as phenyl cyanide, was detected first by stacking of rotational transitions observed in archival Nobeyama 45 m data. It was the only molecule out of a dozen cyclic molecules searched for that was detected by this method. Subsequently, attempts were made to detect individual transitions with the GBT 100 m telescope by covering a total of 1.875 GHz in the 18 to 23 GHz region. Nine transitions with //J'// = 7 to 9 and //K<sub>a</sub>// = 0 to 2 were detected with modest to fairly good signal-to-noise ratios. Some of these transitions displayed partially resolved <sup>14</sup>N hyperfine structure. The inferred column density is somewhat lower than that of HC<sub>9</sub>N, the largest unambigously detected cyanopolyyne thus far.\\ NRAO issued a [[https://public.nrao.edu/news/2018-gbt-chemistry/|press release]] which was also issued by the CfA.\\ The molecule was the most promising candidate for the detection of a benzene derived aromatic molecule by means of radio astronomy. Was it surprising that it was found in TMC-1 ? A. M. Burkhardt, R. A. Loomis, C. N. Shingledecker, K. L. K. Lee, A. J. Remijan, M. C. McCarthy, and B. A. McGuire\\ reported on the\\ **[[https://doi.org/10.1038/s41550-020-01253-4|Ubiquitous aromatic carbon chemistry at the earliest stages of star formation]]**\\ //Science// **359**, 202–205 (2018).\\ Benzonitrile was detected by the same method as in the first reference toward four additional dark clouds, Serpens 1A, 1B, 2, and L1521F.\\ ---- Contributor(s): H. S. P. Müller; 01, 2018; 04, 2021 ---- molecules/ism/phcn.txt Last modified: 2021/04/13 11:33by mueller