J/A+A/601/A2ivo://CDS.VizieR/J/A+A/601/A2doi:10.26093/cds/vizier.36010002CDSPienkina A.O.Margules L.Motiyenko R.A.Mueller H.S.P.Guillemin J.-C.2017-04-24T07:36:06Z2017-04-22T21:36:40ZCDS support team

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

cds-question@unistra.fratomic-physicsA recently published astronomical detection of all three doubly ^13^C-substituted ethyl cyanides toward Sgr B2(N2) motivated us to investigate triple ^13^C isotopic species that are expected to be also present in the ISM. We aim to present an experimental study of the rotational spectrum of triple ^13^C-substituted ethyl cyanide, ^13^CH_3_ ^13^CH_2_ ^13^CN, in the frequency range 150-990GHz. We want to use the determined spectroscopic parameters for searching for ^13^CH_3_ ^13^CH_2_ ^13^CN in ALMA data. The main objective of this work is to provide accurate frequency predictions to search for this molecule in the Galactic center source Sagittarius B2(N) and to facilitate its detection in space. The laboratory rotational spectrum of ^13^CH_3_ ^13^CH_2_ ^13^CN has been recorded with the Lille's fast DDS solid-state spectrometer between 150GHz and 990GHz. Results. More than 4000 rotational transitions were identified in the laboratory. The quantum numbers reach J=115 and Ka=39. Watson's Hamiltonian in the A and S reductions were used to analyze the spectra. Accurate spectroscopic parameters were determined. The rotational spectra of the ^13^C containing species CH3CH2CN have been assigned, thus allowing the determination of the rotational and centrifugal distortion constants.2017A&A...601A...2Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/601/A2CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/493/565 : Deuterated and ^15^N ethyl cyanides (Margules+, 2009)J/A+A/500/1109 : Rotational spectrum of HCOO^13^CH_3_ (Carvajal+, 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+ 2012)J/A+A/548/A71 : Spectroscopy and ISM detection of formamide (Motiyenko+, 2012)J/A+A/549/A96 : mm and sub-mm spectra of 13C-glycolaldehydes (Haykal+, 2013)J/A+A/549/A128 : Singly deuterated isotopologues of formamide (Kutsenko+, 2013)J/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/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 acetaldehydes mm/submm wave spectra (Margules+ 2015)J/A+A/587/A152 : Rotational spectrum of ^13^C methylamine (Motiyenko+, 2016)J/A+A/591/A110 : 15NH_2_ amidogen radical rotational spectrum (Margules+, 2016)J/A+A/592/A43 : Millimeter wave spectra of carbonyl cyanide (Bteich+, 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/601/A2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/601/A2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/601/A2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/601/A2https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/601/A2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/601/A2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/601/A2/table3Assigned rotational transitions of the ground state of triple-^13^C isotopologue of ethyl cyaniderecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintS[g.s.] State identifier (ground state)meta.codecharJ'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.residualdoubleuncUncertainty of measurementsMHzstat.errorfloatRelI? Relative intensity for blended line componentsspect.line.intensity;arith.ratiofloatnullable