J. Cernicharo, B. Tercero, M. Agúndez, C. Cabezas, R. Fuentetaja, N. Marcelino and P. de Vicente
reported on
CN and CCH Derivatives of Ethylene and Ethane: Confirmation of the Detection of CH₃CH₂CCH in TMC-1
Astron. Astrophys. 686, Art. No. A139 (2024).
1-Butyne, aka ethylacetylene, was identified through 9 unblended or slightly blended a-type transitions with 3 ≤ J ≤ 5 and K_a ≤ 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 T_rot ≈ 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