M. Agúndez, C. Cabezas, N. Marcelino, R. Fuentetaja, B. Tercero, P. de Vicente, and J. Cernicharo
reported on
A new protonated molecule discovered in TMC-1: HCCNCH<sup>+</sup>
Astron Astrophys. 659, Art. No. L9 (2022).
Two transitions, J“ = 3 and 4 near 37.3 and 46.6 GHz, of a new, unknown molecule 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. Subsequently, two additional transitions, J” = 8 and 9 near 84.0 and 93.3 GHz, were identified in data from an older IRAM 30 m line survey of TMC-1. Quantum-chemical calculations supported the assignment to HCCNCH+.

The abundance ratio of HCCCNC to HCCCNCH+ is ~10. This extremely low ratio is reproduced well with the reaction of C+ and CH3CN being the main source of HCCNCH+.

Contributor(s): H. S. P. Müller 03, 2022

  • molecules/ism/hccnch.txt
  • Last modified: 2022/03/25 14:45
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