J/ApJ/499/517ivo://CDS.VizieR/J/ApJ/499/517doi:10.26093/cds/vizier.14990517CDSPan J.Albert S.Sastry K.V.L.N.Herbst E.De Lucia F.C.1999-11-26T18:26:19Z1999-11-26T19:26:12ZCDS support team

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

cds-question@unistra.fratomic-physicsspectroscopyThe cyclic molecule ethylene oxide (c-C_2_H_4_O) has recently been detected in the interstellar source Sgr B2N. Previous laboratory work on the rotational spectrum of this molecule extends only to a frequency of 123GHz. We report here the extension of the laboratory rotational spectrum of this species through the frequency range 262358GHz using a new fast scan spectrometer (fast scan submillimeter spectroscopic technique, FASSST). The newly measured lines have been combined with previous data at lower frequencies to form a data set consisting of 662 lines that has been assigned and fitted via a standard semirigid asymmetric top analysis. The spectral constants obtained from the fit have allowed us to predict the frequencies of many additional lines.1998ApJ...499..517Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/499/517CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/117/427 : Sgr B2 spectral survey (Nummelin+, 1998)J/ApJ/500/1059 : Dimethyl ether transitions frequencies (Groner+, 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/499/517https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/499/517http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/499/517https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/499/517https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/499/517http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/499/517GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/499/517/table3Predicted transition frequencies of ethylene oxide in the ground vibrational staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLinkLink to predicted and assigned/fitted resultsmeta.refcharJ'J' rotational quantum numberphys.atmol.qnintK'aK'a rotational quantum numberphys.atmol.qnintK'cK'c rotational quantum numberphys.atmol.qnintJ"J" rotational quantum numberphys.atmol.qnintK"aK"a rotational quantum numberphys.atmol.qnintK"cK"c rotational quantum numberphys.atmol.qnintFreqFrequencyMHzem.freqdoublee_Freqrms uncertainty on FreqMHzstat.errorfloatmu2SIntensity ({mu}^2^S) (1)D**2phys.mol.dipolefloatEuUpper state energycm**-1phys.energy;phys.mol.vibrationfloatJ/ApJ/499/517/table1Assigned and fitted transition frequencies of Ethylene oxide in the ground vibrational staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLinkLink to predicted and assigned/fitted resultsmeta.refcharJ'J' rotational quantum numberphys.atmol.qnintK'aK'a rotational quantum numberphys.atmol.qnintK'cK'c rotational quantum numberphys.atmol.qnintJ"J" rotational quantum numberphys.atmol.qnintK"aK"a rotational quantum numberphys.atmol.qnintK"cK"c rotational quantum numberphys.atmol.qnintFreqMMeasured frequencyMHzem.freqdoubleFreqCCalculated frequencyMHzem.freqdoubleO-CMeasured minus calculated frequency valueMHzem.freqfloatRefReferences (1)meta.refchar