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First detection of ...
First detection of cyanamide (NH2CN) towards solar-type protostars
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- Coutens, A. (author)
- Laboratoire d'Astrophysique de Bordeaux
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- Willis, E. R. (author)
- University of Virginia
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- Garrod, R. T. (author)
- University of Virginia
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- Müller, H. S.P. (author)
- Universität zu Köln,University of Cologne
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- Bourke, T. L. (author)
- SKA Organisation
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- Calcutt, H. (author)
- Köpenhamns universitet,University of Copenhagen
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- Drozdovskaya, M. N. (author)
- Universität Bern,University of Bern
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- Jorgensen, J. 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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- Persson, Magnus V., 1983 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Stéphan, G. (author)
- University of Virginia
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- van der Wiel, M. H. D. (author)
- Netherlands Institute for Radio Astronomy (ASTRON)
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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)
- Universität Bern,University of Bern
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(creator_code:org_t)
- 2018-05-07
- 2018
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 612
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Abstract
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- Searches for the prebiotically relevant cyanamide (NH 2 CN) towards solar-type protostars have not been reported in the literature. We present here the first detection of this species in the warm gas surrounding two solar-type protostars, using data from the Atacama Large Millimeter/Submillimeter Array Protostellar Interferometric Line Survey (PILS) of IRAS 16293-2422 B and observations from the IRAM Plateau de Bure Interferometer of NGC 1333 IRAS2A. We also detected the deuterated and 13 C isotopologs of NH 2 CN towards IRAS 16293-2422 B. This is the first detection of NHDCN in the interstellar medium. Based on a local thermodynamic equilibrium analysis, we find that the deuteration of cyanamide (∼1.7%) is similar to that of formamide (NH 2 CHO), which may suggest that these two molecules share NH 2 as a common precursor. The NH 2 CN/NH 2 CHO abundance ratio is about 0.2 for IRAS 16293-2422 B and 0.02 for IRAS2A, which is comparable to the range of values found for Sgr B2. We explored the possible formation of NH 2 CN on grains through the NH 2 + CN reaction using the chemical model MAGICKAL. Grain-surface chemistry appears capable of reproducing the gas-phase abundance of NH 2 CN with the correct choice of physical parameters.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Keyword
- ISM: molecules
- ISM: individual objects: NGC 1333 IRAS2A
- Astrobiology
- Stars: protostars
- ISM: individual objects: IRAS 16293-2422
- Astrochemistry
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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Willis, E. R.
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Garrod, R. T.
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Müller, H. S.P.
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Bourke, T. L.
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Calcutt, H.
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show more...
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Drozdovskaya, M. ...
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Jorgensen, J. K.
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Ligterink, N. F ...
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Persson, Magnus ...
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Stéphan, G.
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van der Wiel, M. ...
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van Dishoeck, E. ...
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Wampfler, S. F.
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geochemistry
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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and Metallurgy and M ...
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Astronomy and As ...
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Chalmers University of Technology