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Detection of Ethynylcyclopropynylidyne, c-C3H2H, in the ISM
C. Cabezas, M. Agúndez, R. Fuentetaja, Y. Endo, N. Marcelino, B. Tercero, J. R. Pardo, P. de Vicente, and J. Cernicharo
reported on the
Discovery of the Cyclic C<sub>5</sub>H Radical in TMC-1
Astron Astrophys. 663, Art. No. L2 (2022).
The J“ = 5 to 8 transitions between 32.8 and 49.2 GHz were detected 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. The identity was confirmed through laboratory measurements. The C3S to HC3S+ ratio is 65 ± 20, and the HC3O+ to HC3S+ ratio is 1.0 ± 0.5. The C3O to C3S ratio, in contrast, is ~0.11.
Contributor(s): H. S. P. Müller 07, 2022