Tentative Detection of the Glycine Isomer Glycolamide in Hot Molecular Core

Abstract

Understanding whether prebiotic molecules can endure and reform through the energetic stages of star formation is essential for tracing the continuity of interstellar chemistry toward life. Glycolamide, an isomer of glycine, was recently detected in the molecular cloud G+0.693-0.027. However, establishing its presence in warm, high-density environments is crucial to evaluate the chemical continuity of amides. Here we report the tentative detection of glycolamide in a hot molecular core, G358.93-0.03 MM1, using ALMA 1 mm observations. Seven unblended or only mildly blended emission lines were identified, yielding an abundance of (1.7$\pm$0.2)$\times 10^{-10}$ relative to H${}_2$. The comparable formamide/glycolamide and acetamide/glycolamide abundance ratios in both sources suggest a chemically connected amide network across different environments. These results demonstrate that amides can persist and chemically evolve during massive star formation, tracing the chemical continuity from interstellar to protostellar environments.

9 pages, 5 figures, 2 tables, accepted for publication in A&A

References in corpus (17)

• Complex Chemistry in Star-Forming Regions: An Expanded Gas-Grain Warm-up Chemical Model
• MAMBO Mapping of Spitzer c2d Small Clouds and Cores
• The Spatial Distribution of Complex Organic Molecules in the L1544 Pre-stellar Core
• Formation of complex organic molecules in hot molecular cores through nondiffusive grain-surface and ice-mantle chemistry
• A Search for Propylene Oxide and Glycine in Sagittarius B2 (LMH) and Orion
• A Search for Biomolecules in Sagittarius B2 (LMH) with the ATCA
• Direct measurements of carbon and sulfur isotope ratios in the Milky Way
• The GUAPOS project II. A comprehensive study of peptide-like bond molecules
• Amides inventory towards the G+0.693-0.027 molecular cloud
• Interstellar glycolamide: A comprehensive rotational study and an astronomical search in Sgr B2(N)
• Identification of the simplest sugar-like molecule glycolaldehyde towards the hot molecular core G358.93-0.03 MM1
• The Role of Ultraviolet Photons in Circumstellar Astrochemistry
• Identification of interstellar cyanamide towards the hot molecular core G358.93-0.03 MM1
• Constraints of the formation and abundances of methyl carbamate, a glycine isomer, in hot corinos
• Detection of antifreeze molecule ethylene glycol in the hot molecular core G358.93$-$0.03 MM1
• Observation of Complex Organic Molecules Containing Peptide-like Bonds Toward Hot Core G358.93$-$0.03 MM1
• The ALMA-QUARKS survey: Extensive detection of acetamide in multiple high-mass star-forming regions