===== On the Detection of Aminomethylidyne, H<sub>2</sub>NC, in the ISM =====

C. Cabezas, M. Agúndez, N. Marcelino, B. Tercero, S. Cuadrado, and J. Cernicharo\\
reported on the\\
**[[https://doi.org/10.1051/0004-6361/202141491|Interstellar Detection of the Simplest Aminocarbyne H<sub>2</sub>NC: An ignored but Abundant Molecule]]**\\
//Astron. Astrophys.// **654**, Art. No. A45 (2021).\\
The aminomethylidyne isomer was observed in the course of molecular line surveys of L483 and B1-b protostellar objects carried out at 3 mm using the IRAM 30 m telescope. The molecule was not detected in corresponding data of the prestellar core TMC-1. The column densities of H<sub>2</sub>CN and H<sub>2</sub>NC were essentially the same in the first two sources.\\
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D. San Andrés, L. Colzi, V. M. Rivilla, J. García de la Concepción, M. Melosso, J. Martín-Pintado, I. Jiménez-Serra, S. Zeng, S. Martín, M. A. Requena-Torres\\
reported on the\\
**[[https://doi.org/10.1093/mnras/stad1385|H<sub>2</sub>CN/H<sub>2</sub>NC Abundance Ratio: A New Potential Temperature Tracer for the Interstellar Medium]]**\\
//Mon. Not. R. Astron. Soc.// **523**, 3239–3250 (2023).\\
The authors detect two transitions toward this kinetically warmer source and concomitantly a H<sub>2</sub>CN/H<sub>2</sub>NC ratio of about 2, different from ~1 in the kinetically colder sources L483 and B1-b.\\
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Contributor(s): H. S. P. Müller; 10, 2021; 06, 2023

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