J/A+A/592/A43ivo://CDS.VizieR/J/A+A/592/A43doi:10.26093/cds/vizier.35920043CDSBteich S.B.Tercero B.Cernicharo J.Motiyenko R.A.Margules L.,Guillemin J.-C.2016-07-19T06:49:24Z2016-07-19T07:48:58ZCDS support team

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

cds-question@unistra.fratomic-physicsspectroscopyMore than 30 cyanide derivatives of simple organic molecules have been detected in the interstellar medium, but only one dicarbonitrile has been found and that very recently. There is still a lack of high-resolution spectroscopic data particularly for dinitriles derivatives. The carbonyl cyanide molecule is a new and interesting candidate for astrophysical detection. It could be formed by the reaction of CO and CN radicals, or by substitution of the hydrogen atom by a cyano group in cyanoformaldehyde, HC(=O)CN, that has already been detected in the interstellar medium. The available data on the rotational spectrum of carbonyl cyanide is limited in terms of quantum number values and frequency range, and does not allow accurate extrapolation of the spectrum into the millimeter-wave range. To provide a firm basis for astrophysical detection of carbonyl cyanide we studied its millimeter-wave spectrum. Methods. The rotational spectrum of carbonyl cyanide was measured in the frequency range 152-308GHz and analyzed using Watson's A- and S-reduction Hamiltonians. The ground and first excited state of v5 vibrational mode were assigned and analyzed. More than 1100 distinct frequency lines of the ground state were fitted to produce an accurate set of rotational and centrifugal distortion constants up to the eighth order. The frequency predictions based on these constants should be accurate enough for astrophysical searches in the frequency range up to 500GHz and for transition involving energy levels with J<100 and Ka<42. Based on the results we searched for interstellar carbonyl cyanide in available observational data without success. Thus, we derived upper limits to its column density in different sources.2016A&A...592A..43Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/592/A43CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/493/565 : Deuterated and ^15^N ethyl cyanides (Margules+, 2009)J/A+A/538/A51 : Rotational spectrum of CH_3_CH(NH_2_)CN (Mollendal+, 2012)J/A+A/538/A119 : Spectrum of ^18^O-methyl formate HCO^18^OCH_3_ (Tercero+ 2012)J/A+A/540/A51 : Submm spectrum of deuterated glycolaldehydes (Bouchez+, 2012)J/A+A/543/A46 : Submillimeter spectrum of HCOOCD_2_H (Coudert+, 2012)J/A+A/543/A135 : New analysis of ^13^C-CH_3_CH_2_CN up to 1THz (Richard+, 2012J/A+A/544/A82 : Rotational spectroscopy of diisocyanomethane (Motiyenko+, 2012J/A+A/548/A71 : Spectroscopy and ISM detection of formamide (Motiyenko+, 2012)J/A+A/549/A96 : The mm & sub-mm spectra of 13C-glycolaldehydes (Haykal+, 2013)J/A+A/549/A128 : Singly deuterated isotopologues of formamide (Kutsenko+, 2013J/A+A/552/A117 : Mono-deuterated dimethyl ether (Richard+, 2013)J/A+A/553/A84 : (Sub)mm spectrum of deuterated methyl cyanides (Nguyen+, 2013)J/A+A/559/A44 : Rotational spectrum of MAAN (CH_2_NCH_2_CN) (Motiyenko+, 2013)J/ApJ/779/119 : HCOOCH_2_D detection in Orion KL (Coudert+, 2013)J/A+A/563/A137 : THz spectrum of methylamine (Motiyenko+, 2014)J/A+A/568/A58 : HCOO^13^CH_3_ rotational spectrum (Haykal+, 2014)J/A+A/579/A46 : Mono-^13^C acetaldehyde mm/submm wave spectra (Margules+ 2015)J/A+A/587/A152 : Rotational spectrum of ^13^C methylamine (Motiyenko+, 2016)J/A+A/590/A93 : Doubly ^13^C-substituted ethyl cyanide (Margules+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/592/A43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/592/A43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/592/A43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/592/A43https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/592/A43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/592/A43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/592/A43/table3Assigned rotational transitions of the ground and v5=1 excited vibrational states of carbonyl cyaniderecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSState identifierphys.atmol.qncharJ'Upper J quantum numberinstr.det.qe;stat.maxintKa'Upper Ka quantum numberphys.atmol.qn;stat.maxintKc'Upper Kc quantum numberphys.atmol.qn;stat.maxintJ"Lower J quantum numberinstr.det.qe;stat.minintKa"Lower Ka quantum numberphys.atmol.qn;stat.minintKc"Lower Kc quantum numberphys.atmol.qn;stat.minintFreqObserved transition frequencyMHzem.freqdoubleO-CResiduals of the fitMHzstat.fit.residual;stat.fit.param;meta.modelledfloatuncUncertainty of measurementsMHzstat.errorfloatRelI? Relative intensity for blended line componentsspect.line.intensity;arith.ratiodoublenullableJ/A+A/592/A43/table4Predicted rotational transitions of the ground vibrational state of carbonyl cyanide up to 1THzrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ'Upper J quantum numberinstr.det.qe;stat.maxintKa'Upper Ka quantum numberphys.atmol.qn;stat.maxintKc'Upper Kc quantum numberphys.atmol.qn;stat.maxintJ"Lower J quantum numberinstr.det.qe;stat.minintKa"Lower Ka quantum numberphys.atmol.qn;stat.minintKc"Lower Kc quantum numberphys.atmol.qn;stat.minintFreqPredicted transition frequencyMHzem.freq;phys.atmol.transitiondoubleUncUncertainty of predicted transition frequencyMHzstat.error;em.freq;phys.atmol.transitionfloatSmu2Product mu^2*SD**2spect.line.intensitydoubleWstNuclear spin statistical weightstat.weight;phys.atmol.sWeight.nuclearintEloThe energy of the lower statecm**-1phys.energy;phys.atmol.leveldouble