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hal.structure.identifierAMOR 2018
dc.contributor.authorCOUTENS, Audrey
dc.contributor.authorWILLIS, E. R.
hal.structure.identifierDepartment of Physics, The Ohio State University
dc.contributor.authorGARROD, R. T.
dc.contributor.authorMÜLLER, H. S. P.
dc.contributor.authorBOURKE, T. L.
dc.contributor.authorCALCUTT, H.
dc.contributor.authorDROZDOVSKAYA, M. N.
hal.structure.identifierforeign laboratories [FL]
dc.contributor.authorJØRGENSEN, J. K.
dc.contributor.authorLIGTERINK, N. F. W.
dc.contributor.authorPERSSON, M. V.
dc.contributor.authorSTÉPHAN, G.
dc.contributor.authorVAN DER WIEL, M. H. D.
hal.structure.identifierLeiden Observatory [Leiden]
dc.contributor.authorVAN DISHOECK, E. F.
hal.structure.identifierCenter for Space and Habitability [CSH]
dc.contributor.authorWAMPFLER, S. F.
dc.date.issued2018
dc.identifier.issn0004-6361
dc.description.abstractEnSearches for the prebiotically-relevant cyanamide (NH$_2$CN) towards solar-type protostars have not been reported in the literature. We here present 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 NGC1333 IRAS2A. We furthermore detect the deuterated and $^{13}$C isotopologues 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 ($\sim$ 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.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enAstrophysics - Solar and Stellar Astrophysics
dc.subject.enAstrophysics - Astrophysics of Galaxies
dc.title.enFirst detection of cyanamide (NH$_2$CN) towards solar-type protostars
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201732346
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.identifier.arxiv1712.09548
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageid.A107
bordeaux.volume612
bordeaux.peerReviewedoui
hal.identifierhal-01685042
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01685042v1
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