===== On Methylketene in Space =====

R. Fuentetaja, C. Bermúdez, C. Cabezas, M. Agúndez, B. Tercero, N. Marcelino, J. R. Pardo, L. Margulès, R. A. Motiyenko, J.-C. Guillemin, P. de Vicente, and J. Cernicharo\\
reported on the\\
**[[https://doi.org/10.1051/0004-6361/202245732|Discovery of CH<sub>3</sub>CHCO in TMC-1 with the QUIJOTE Line Survey]]**\\
//Astron. Astrophys.// **671**, (2023), Art. No. L6.\\
Ten rotational transitions with 3 ≤ //J// ≤ 5 and //K<sub>a</sub>// were identified with resolved methyl internal rotation splitting. A sufficiently large fraction of the lines is not or only marginally blended and above the 3//σ// noise level. The ketene to methylketene ratio is ~93; the ratio of methylketene to it isomer //trans//-propenal is about 2/3.\\
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Contributor(s): H. S. P. Müller; 03, 2023

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