J/A+A/644/A3ivo://CDS.VizieR/J/A+A/644/A3doi:10.26093/cds/vizier.36440003CDSSanz-Novo M.Leon I.Alonso J.L.Largo A.Barrientos C.2021-02-15T10:53:30Z2020-11-24T08:51:23ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frinterstellar-mediumspectroscopyatomic-physicsCyanoacetamide is a branched chain -CN bearing molecule which is also an amide derivative target molecule in the interstellar medium. The aim of our investigation is to analyze the feasibility of a plausible formation process of protonated cyanoacetamide under interstellar conditions and to provide direct experimental frequencies of the ground vibrational state of the neutral form in the microwave region in order to enable its eventual identification in the interstellar medium. We used high-level theoretical computations to study the formation process of protonated cyanoacetamide. Furthermore, we employed a high resolution laser ablation molecular beam Fourier transform (LA-MB-FTMW) spectroscopic technique to measure the frequencies of the neutral form. We report the first rotational characterization of cyanoacetamide and a precise set of the relevant rotational spectroscopic constants have been determined as a first step to identify the molecule in the interstellar medium. We performed full exploration of the Potential Energy Surface (PES) to study a gas-phase reaction on the formation process of protonated cyanoacetamide. We found an exothermic process with no net activation barrier initiated by the high-energy isomer of protonated hydroxylamine, which leads to protonated cyanoacetamide.2020A&A...644A...3Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/644/A3CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/644/A3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/644/A3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/644/A3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/644/A3https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/644/A3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/644/A3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/644/A3/catalogCalculated rotational transitions of cyanoacetamide in the ground staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqFrequency of the lineMHzem.freqdoublee_FreqEstimated or experimental errorMHzstat.errorfloatlogIntBase 10 logarithm of the integrated intensitylog(nm**2.MHz)meta.code;spect.line.intensityfloatDOFDegrees of freedom in the partition functionstat.fit.dofintElowLower state in wavenumbersphys.energy;phys.atmol.leveldoublegupUpper state degeneracyphys.electron.degenintTagSpecies tag or molecular identifiermeta.codeintQNFMTIdentifies the format of the quantum numbers given in the field QNmeta.codecharQNQuantum numbers coded according to QNFMTphys.mol.qnchar