On the Discovery of Glycolamide in the ISM
V. M. Rivilla, M. Sanz-Novo, I. Jiménez-Serra, J. Martín-Pintado, L. Colzi, S. Zeng, A. Megías, Á. López-Gallifa, A. Martínez-Henares, S. Massalkhi, B. Tercero, P. de Vicente, S. Martín, D. S. Andrés, M. A. Requena-Torres, and J. L. Alonso
reported on the
First Glycine Isomer Detected in the Interstellar Medium: Glycolamide (NH2C(O)CH2OH)
Astrophys. J. Lett. 953, Art. No. L20 (2023).
The molecule was detected in the course of a molecular line survey of the Galactic Center molecular cloud G+0.693–0.027 employing the Yebes 40 m and IRAM 30 m radio telecopes. The transitions cover 31 to 98 GHz with 1 ≤ J ≤ 7 and Ka ≤ 5. Some lines are unblended, slightly blended, or the peak of the line is at most slightly blended. Some further lines are blended more substantially. The glycolaldehyde/glycolamide ratio is ∼15, while the ethanol/ethanolamine ratio is ∼40.
More recently,
C. Duan, F. Xu, Q. Gou, X. Xu, D. Quan, L. Pagani, X. Chen, J. Kang, and J. Du
announced the
Tentative Detection of the Glycine Isomer Glycolamide in a Hot Molecular Core
Astron. Astrophys. 709, Art. No. A93 (2026).
Employing archival ALMA Band 7 data near of G358.93−0.03 MM1 near 300 GHz, the authors identified 7 unblended or slightly blended lines. The identitification was deemed tentative because of the small number of transitions and because severeal of these are close to the 3σ S/N limit. A rotational temperature of ~100 K was derived. Formamide and acetamide are more abundant by factors of about 32 and 17, respectively.
Contributor(s): H. S. P. Müller; 08, 2023; 06, 2026