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On HCxN+ in the ISM
J. Cernicharo, C. Cabezas, M. Agúndez, Y. Endo, B. Tercero, N. Marcelino and P. de Vicente
reported on the
QUIJOTE discovery of the cation radicals HC5N+ and HC7N+
Astron. Astrophys. 686, Art. No. L15 (2024).
1-Butyne, aka ethylacetylene, was identified through 9 unblended or slightly blended a-type transitions with 3 ≤ J ≤ 5 and Ka ≤ 2 in the course of a molecular line survey of the prototypical cold dark molecular cloud TMC-1 carried out with the Yebes 40 m radio telescope between 33.6 and 44.3 GHz. A value of Trot ≈ 9 K was derived. The column density of 1-butnyne is about a factor of 15 lower than that of butenyne.
Contributor(s): H. S. P. Müller; 06, 2024