Identification of the simplest sugar-like molecule glycolaldehyde towards the hot molecular core G358.93-0.03 MM1

Abstract

Glycolaldehyde (CH${}_2$OHCHO) is the simplest monosaccharide sugar in the interstellar medium, and it is directly involved in the origin of life via the 'RNA world' hypothesis. We present the first detection of glycolaldehyde (CH${}_2$OHCHO) towards the hot molecular core G358.93-0.03 MM1 using the Atacama Large Millimeter/Submillimeter Array (ALMA). The calculated column density of CH${}_2$OHCHO towards G358.93-0.03 MM1 is (1.52$\pm$0.9)$\times$10${}^{16}$ cm${}^{-2}$ with an excitation temperature of 300$\pm$68.5 K. The derived fractional abundance of CH${}_2$OHCHO with respect to H${}_2$ is (4.90$\pm$2.92)$\times$10${}^{-9}$, which is consistent with that estimated by existing two-phase warm-up chemical models. We discuss the possible formation pathways of CH${}_2$OHCHO within the context of hot molecular cores and hot corinos and find that CH${}_2$OHCHO is likely formed via the reactions of radical HCO and radical CH${}_2$OH on the grain surface of G358.93-0.03 MM1.

12 pages, 4 figures, published in Monthly Notices of the Royal Astronomical Society (MNRAS)

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Cited by in corpus (9)

• First Identification and Chemical Modeling of New Thiol ($-$SH) Bearing Molecule in the Interstellar Medium: Dithioformic Acid
• Detection of possible glycine precursor molecule methylamine towards the hot molecular core G358.93$-$0.03 MM1
• Detection of antifreeze molecule ethylene glycol in the hot molecular core G358.93$-$0.03 MM1
• Observation of Complex Organic Molecules Containing Peptide-like Bonds Toward Hot Core G358.93$-$0.03 MM1
• ACA observation and chemical modelling of phosphorus nitride (PN) towards the hot molecular cores G10.47+0.03 and G31.41+0.31
• Detection and prebiotic chemistry of possible glycine precursor molecule methylenimine towards the hot molecular core G10.47+0.03
• First detection of ethylene oxide and acetaldehyde in hot core G358.93$-$0.03 MM1: Tracing prebiotic oxygen chemistry
• Organic Acid Chemistry in ISM: Detection of Formic Acid and its Prebiotic Chemistry in Hot Core G358.93$-$0.03 MM1
• Tentative Detection of the Glycine Isomer Glycolamide in Hot Molecular Core