On the Detection of Propenethial in the ISM
C. Cabezas, K. Vávra, G. Molpeceres, L. Kolesniková, M. Agúndez, G. Vylitová, N. Marcelino, L. Hrubčík, R. Fuentetaja, T. Uhlíková, B. Tercero, J. Koucký, G. Esplugues, P. Kania, P. de Vicente, Š. Urban, and J. Cernicharo
reported on the
Discovery of propenethial (CH<sub>2</sub>CHCHS) in TMC-1 − The sulphur analogue of acrolein
Astron. Astrophys. 698, Art. No. L24 (2025).
Propenethial, also known as thioacrolein, was identified through a-type transitions with J = 6 − 5 to 9 − 8 and Ka ≤ 1 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 31.0 and 50.4 GHz. Nine of the covered transitions were not or not severely blended; the signal-to-noise ratio was rather low for two of them. A value of Trot = 9 K was assumed. Its column density is about a factor of 27 and 7 lower than those of cyanothioformaldehyde andthioacetaldehyde, respectively. And it is only about a factor of 5 lower than that of propenal.
Contributor(s): H. S. P. Müller; 06, 2025