The Prebiotic Molecular Inventory of Serpens SMM1: II. The Building Blocks of Peptide Chains
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The Prebiotic Molecular Inventory of Serpens SMM1 : II. The Building Blocks of Peptide Chains. / Ligterink, Niels F. W.; Ahmadi, Aida; Luitel, Bijaya; Coutens, Audrey; Calcutt, Hannah; Tychoniec, Lukasz; Linnartz, Harold; Jorgensen, Jes K.; Garrod, Robin T.; Bouwman, Jordy.
In: ACS Earth and Space Chemistry , Vol. 6, No. 3, 17.03.2022, p. 455-467.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - The Prebiotic Molecular Inventory of Serpens SMM1
T2 - II. The Building Blocks of Peptide Chains
AU - Ligterink, Niels F. W.
AU - Ahmadi, Aida
AU - Luitel, Bijaya
AU - Coutens, Audrey
AU - Calcutt, Hannah
AU - Tychoniec, Lukasz
AU - Linnartz, Harold
AU - Jorgensen, Jes K.
AU - Garrod, Robin T.
AU - Bouwman, Jordy
PY - 2022/3/17
Y1 - 2022/3/17
N2 - This work aims to constrain the abundances of interstellar amides, by searching for this group of prebiotic molecules in the intermediate-mass protostar Serpens SMM1-a. ALMA observations are conducted toward Serpens SMM1. A spectrum is extracted toward the SMM1-a position and analyzed with the CASSIS line analysis software for the presence of characteristic rotational lines of a number of amides and other molecules. NH2CHO, NH2CHO nu(12) = 1, (NH2CHO)-C-13, CH3C(O)-NH2 nu = 0, 1, CH2DOH, CH3CHO, and CH3C(O)CH3 are securely detected, while trans-NHDCHO, NH2CDO, CH3NHCHO nu = 0, 1, CH3COOH, and HOCH2CHO are tentatively identified. The results of this work are compared with detections presented in the literature. A uniform CH3C(O)NH2/NH2CHO ratio is found for a group of interstellar sources with vast physical differences. A similar ratio is seen for CH3NHCHO, based on a smaller data sample. The D/H ratio of NH2CHO is about 1-3% and is close to values found in the low-mass source IRAS 16293-2422B. The formation of CH3C(O)NH2 and NH2CHO is likely linked. Formation of these molecules on grain surfaces during the dark cloud stage is a likely scenario. The high D/H ratio of NH2CHO is also seen as an indication that these molecules are formed on icy dust grains. As a direct consequence, amides are expected to be present in the most pristine material from which planetary systems form, thus providing a reservoir of prebiotic material.
AB - This work aims to constrain the abundances of interstellar amides, by searching for this group of prebiotic molecules in the intermediate-mass protostar Serpens SMM1-a. ALMA observations are conducted toward Serpens SMM1. A spectrum is extracted toward the SMM1-a position and analyzed with the CASSIS line analysis software for the presence of characteristic rotational lines of a number of amides and other molecules. NH2CHO, NH2CHO nu(12) = 1, (NH2CHO)-C-13, CH3C(O)-NH2 nu = 0, 1, CH2DOH, CH3CHO, and CH3C(O)CH3 are securely detected, while trans-NHDCHO, NH2CDO, CH3NHCHO nu = 0, 1, CH3COOH, and HOCH2CHO are tentatively identified. The results of this work are compared with detections presented in the literature. A uniform CH3C(O)NH2/NH2CHO ratio is found for a group of interstellar sources with vast physical differences. A similar ratio is seen for CH3NHCHO, based on a smaller data sample. The D/H ratio of NH2CHO is about 1-3% and is close to values found in the low-mass source IRAS 16293-2422B. The formation of CH3C(O)NH2 and NH2CHO is likely linked. Formation of these molecules on grain surfaces during the dark cloud stage is a likely scenario. The high D/H ratio of NH2CHO is also seen as an indication that these molecules are formed on icy dust grains. As a direct consequence, amides are expected to be present in the most pristine material from which planetary systems form, thus providing a reservoir of prebiotic material.
KW - COMPLEX ORGANIC-MOLECULES
KW - ACETAMIDE CH3CONH2
KW - SURFACE-CHEMISTRY
KW - COLOGNE DATABASE
KW - GALACTIC-CENTER
KW - ICE ANALOGS
KW - INTERSTELLAR
KW - PHOTOLYSIS
KW - OLIGOPEPTIDES
KW - SPECTROSCOPY
U2 - 10.1021/acsearthspacechem.1c00330
DO - 10.1021/acsearthspacechem.1c00330
M3 - Journal article
VL - 6
SP - 455
EP - 467
JO - ACS Earth and Space Chemistry
JF - ACS Earth and Space Chemistry
SN - 2472-3452
IS - 3
ER -
ID: 303447314