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On Extragalactic Protonated Acetylene
S. Muller, R. Le Gal, E. Roueff, J. H. Black, A. Faure, M. Guélin, A. Omont, M. Gérin, F. Combes, and S. Aalto
reported on the
Protonated Acetylene in the //z// = 0.89 Molecular Absorber toward PKS 1830−211
Astron. Astrophys. 683, (2024) Art. No. A62.
The molecule was identified through the ortho-transition 212 – 101 at a rest frequency of 494.034 GHz and through the para-transition 111 – 000 at a rest frequency of 431.315 GHz.