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First detection of cyanamide (NH$_2$CN) towards solar-type protostars

hal.structure.identifierAMOR 2018
dc.contributor.authorCOUTENS, Audrey
dc.contributor.authorWILLIS, E. R.
hal.structure.identifierThe Ohio State University [Columbus] [OSU]
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.rights.urihttp://creativecommons.org/licenses/by/
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
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2018&rft.volume=612&rft.spage=id.A107&rft.epage=id.A107&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=COUTENS,%20Audrey&WILLIS,%20E.%20R.&GARROD,%20R.%20T.&M%C3%9CLLER,%20H.%20S.%20P.&BOURKE,%20T.%20L.&rft.genre=article


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