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On the Detection of Ethynylium in Space
A. M. Jacob, K. M. Menten, S. Brünken, A. Belloche, F. Wyrowski, W. G. D. P. Silva, O. Asvany, S. Khan, S. Kabanovic, K. Steenbakkers, G. C. Groenenboom, B. Redlich, and S. Schlemmer
reported on the
First Detection of C2H+ in the Interstellar Medium
Astron. Astrophys. 975, Art. No. 174 (2026).
Ethynylium with a 3Π electronic ground state was detected with the APEX 12 m sub-mm telescope in its lowest Ω = 2 J = 3 − 2 transition near