J/A+A/629/A35ivo://CDS.VizieR/J/A+A/629/A35doi:10.26093/cds/vizier.36290035CDSCabezas C.Bermudez C.Gallego J.D.Tercero B.Hernandez J.M.,Tanarro I.Herrero V.J.Domenech J.L.Cernicharo J.2019-09-02T11:50:35Z2019-09-02T08:16:02ZCDS support team

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

cds-question@unistra.fratomic-physicsDinitriles with a saturated hydrocarbon skeleton and a -CN group at each end can have large electric dipole moments. Their formation can be related to highly reactive radicals such as CH_2_CN, C_2_N or CN. Thus, these saturated dinitriles are potential candidates to be observed in the ISM. Our goal is the investigation of the rotational spectrum of one of the simplest dinitriles NC-CH_2_-CH_2_-CN, succinonitrile, whose actual rotational parameters are not precise enough to allow its detection it in the ISM. In addition, the rotational spectra for its vibrational excited states will be analyzed. The rotational spectra of succinonitrile was measured in the frequency range 72-116.5GHz using a new broadband millimeter-wave spectrometer based on radio astronomy receivers with Fast Fourier Transform backends. The identification of the vibrational excited states of succinonitrile was supported by high-level ab initio calculations on the harmonic and anharmonic force fields. A total of 459 rotational transitions with maximum values of J and Ka quantum numbers 70 and 14, respectively, were measured for the ground vibrational state of succinonitrile. The analysis allowed us to accurately determine the rotational, quartic and sextic centrifugal distortion constants. Up to eleven vibrational excited states, resulted from the four lowest frequency vibrational modes nu13, nu12, nu24 and nu23 were identified. In addition to the four fundamental modes, we observed overtones together with some combination states. The rotational parameters for the ground state were employed to unsuccessfully search for succinonitrile in the cold and warm molecular clouds Orion KL, Sgr B2(N), B1-b and TMC-1,using the spectral surveys captured by IRAM 30m at 3mm and the Yebes 40m at 1.3cm and 7mm.2019A&A...629A..35Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/629/A35CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/629/A35https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/629/A35http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/629/A35https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/629/A35https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/629/A35http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/629/A35GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/629/A35/tablea1Measured transitions for the ground stateKc'Quantum number Kc for upper levelphys.atmol.qnintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea2Measured transitions for the n13 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea3Measured transitions for the n12 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea4Measured transitions for the 2n13 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea5Measured transitions for the n13+nu12 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea6Measured transitions for the n24 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea7Measured transitions for the 3n13 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea8Measured transitions for the 4n13 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea9Measured transitions for the 2n12 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea10Measured transitions for the 2n13+nu12 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea12Measured transitions for the n23 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloatJ/A+A/629/A35/tablea13Predicted frequencies for the ground staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Quantum number J for upper levelinstr.det.qeintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqFrequencyMHzem.freqdoublelogIntBase 10 logarithm of the integrated intensitylog(nm**2.MHz**-1)spect.line.intensityfloatJ/A+A/629/A35/tablea11Measured transitions for the n13+nu24 stateJ'Quantum number J for upper levelinstr.det.qeintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKa'Quantum number Ka for upper levelphys.atmol.qnintKc'Quantum number Kc for upper levelphys.atmol.qnintJ"Quantum number J for lower levelinstr.det.qeintKa"Quantum number Ka for lower levelphys.atmol.qnintKc"Quantum number Kc for lower levelphys.atmol.qnintFreqMeasMeasured frequencyMHzem.freqdoublee_FreqMeasUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between observed and calculated frequencyMHzstat.fit.residualfloat