Universität zu Köln

Coutens, A., Jorgensen, J. K., van der Wiel, M. H. D., Mueller, H. S. P., Lykke, J. M., Bjerkeli, P., Bourke, T. L., Calcutt, H., Drozdovskaya, M. N., Favre, C., Fayolle, E. C., Garrod, R. T., Jacobsen, S. K., Ligterink, N. F. W., Oberg, K. I., Persson, M. V., van Dishoeck, E. F. and Wampfler, S. F. (2016). The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium. Astron. Astrophys., 590. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

Formamide (NH2CHO) has previously been detected in several star-forming regions and is thought to be a precursor for different prebiotic molecules. Its formation mechanism is still debated, however. Observations of formamide, related species, and their isopotologues may provide useful clues to the chemical pathways leading to their formation. The Protostellar Interferometric Line Survey (PILS) represents an unbiased, high angular resolution and sensitivity spectral survey of the low-mass protostellar binary IRAS 16293-2422 with the Atacama Large Millimeter/submillimeter Array (ALMA). For the first time, we detect the three singly deuterated forms of NH2CHO (NH2CDO, cis-and trans-NHDCHO), as well as DNCO towards the component B of this binary source. The images reveal that the different isotopologues are all present in the same region. Based on observations of the C-13 isotopologues of formamide and a standard C-12/C-13 ratio, the deuterium fractionation is found to be similar for the three different forms with a value of about 2%. The DNCO/HNCO ratio is also comparable to the D/H ratio of formamide (similar to 1%). These results are in agreement with the hypothesis that NH2CHO and HNCO are chemically related through grain-surface formation.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Coutens, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jorgensen, J. K. UNSPECIFIED UNSPECIFIED UNSPECIFIED van der Wiel, M. H. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, H. S. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lykke, J. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bjerkeli, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bourke, T. L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Calcutt, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Drozdovskaya, M. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Favre, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fayolle, E. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Garrod, R. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jacobsen, S. K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ligterink, N. F. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Oberg, K. I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Persson, M. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED van Dishoeck, E. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wampfler, S. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-274276
DOI:	10.1051/0004-6361/201628612
Journal or Publication Title:	Astron. Astrophys.
Volume:	590
Date:	2016
Publisher:	EDP SCIENCES S A
Place of Publication:	LES ULIS CEDEX A
ISSN:	1432-0746
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GRAIN-SURFACE-CHEMISTRY; GAS-PHASE REACTIONS; MOLECULAR-SPECTROSCOPY; ROTATIONAL SPECTRUM; COLOGNE DATABASE; DIPOLE-MOMENT; GROUND-STATE; 1 THZ; MICROWAVE; MILLIMETER Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27427