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The ALMA-PILS surve...
The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium
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- Coutens, A. (author)
- University College London (UCL)
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- Jorgensen, J. K. (author)
- Köpenhamns universitet,University of Copenhagen
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- van der Wiel, M. H. D. (author)
- Köpenhamns universitet,University of Copenhagen
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- Müller, H. S. P. (author)
- Universität zu Köln,University of Cologne
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- Lykke, J. M. (author)
- Köpenhamns universitet,University of Copenhagen
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- Bjerkeli, Per, 1977 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Köpenhamns universitet,University of Copenhagen
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- Bourke, T. L. (author)
- SKA Organisation
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- Calcutt, Hannah, 1988 (author)
- Köpenhamns universitet,University of Copenhagen
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- Drozdovskaya, M. N. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Favre, C. (author)
- Centre national de la recherche scientifique (CNRS)
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- Fayolle, E. C. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Garrod, R. T. (author)
- University of Virginia
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- Jacobsen, S. K. (author)
- Köpenhamns universitet,University of Copenhagen
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- Ligterink, N. F W (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Öberg, K. I. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Persson, Magnus V., 1983 (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- van Dishoeck, E. F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universiteit Leiden (UL),Leiden University (UL)
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- Wampfler, S. F. (author)
- Köpenhamns universitet,University of Copenhagen
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(creator_code:org_t)
- 2016-05-30
- 2016
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 590
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Abstract
Subject headings
Close
- 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 13C isotopologues of formamide and a standard 12C/13C 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 (~1%). These results are in agreement with the hypothesis that NH2CHO and HNCO are chemically related through grain-surface formation.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Stars: formation
- Astrochemistry
- Stars: protostars
- ISM: molecules
- Astrobiology
- ISM: individual objects: IRAS 16293-2422
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Coutens, A.
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Jorgensen, J. K.
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van der Wiel, M. ...
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Müller, H. S. P.
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Lykke, J. M.
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Bjerkeli, Per, 1 ...
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Bourke, T. L.
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Calcutt, Hannah, ...
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Drozdovskaya, M. ...
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Favre, C.
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Fayolle, E. C.
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Garrod, R. T.
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Jacobsen, S. K.
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Ligterink, N. F ...
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Öberg, K. I.
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Persson, Magnus ...
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van Dishoeck, E. ...
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Wampfler, S. F.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Chalmers University of Technology