J/A+A/629/A73ivo://CDS.VizieR/J/A+A/629/A73doi:10.26093/cds/vizier.36290073CDSZakharenko O.Ilyushin V.V.Lewen F.Mueller H.S.P.Schlemmer S.,Alekseev E.A.Pogrebnyak M.LArmieieva I.A.Dorovskaya O.Xu L.-H.,Lees R.M.2019-09-16T08:22:17Z2019-09-11T12:55:30ZCDS support team

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

cds-question@unistra.fratomic-physicsWe present a new global study of the millimeter wave, submillimeter wave, and THz spectra of the lowest three torsional states of methyl mercaptan (CH_3_SH). New measurements have been carried out between 50 and 510GHz using the Kharkiv mm wave and the Cologne submm wave spectrometers whereas THz spectra records were used from our previous study. The new data involving torsion-rotation transitions with J up to 61 and Ka up to 18 were combined with previously published measurements and fitted using the rho-axis-method torsion-rotation Hamiltonian. The final fit used 124 parameters to give an overall weighted root- mean-square deviation of 0.72 for the dataset consisting of 6965 microwave and 16345 FIR line frequencies sampling transitions within and between the ground, first, and second excited torsional states of the molecule. This investigation presents a twofold expansion in the J quantum numbers and a significant improvement in the fit quality, especially for the microwave part of the data thus allowing us to provide improved predictions to support astronomical observations.2019A&A...629A..73Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/629/A73CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/629/A73https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/629/A73http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/629/A73https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/629/A73https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/629/A73http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/629/A73GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/629/A73/ftfirdatFTFIR data used in the current fit of methyl mercaptan spectrumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSym1Upper level symmetry species in G6phys.atmol.element;stat.maxcharm1Upper free rotor m quantum numberphys.atmol.qn;stat.maxintJ1Upper J quantum numberinstr.det.qe;stat.maxintKa1Upper Ka quantum numberphys.atmol.qn;stat.maxintKc1Upper Kc quantum numberphys.atmol.qn;stat.maxintSym0Lower level symmetry species in G6phys.atmol.element;stat.mincharm0Lower free rotor m quantum numberphys.atmol.qn;stat.minintJ0Lower J quantum numberinstr.det.qe;stat.minintKa0Lower Ka quantum numberphys.atmol.qn;stat.minintKc0Lower Kc quantum numberphys.atmol.qn;stat.minintFreqMeasured transition frequencycm**-1em.freq;phys.atmol.transitiondoubleUncMeasurement uncertainty of transition frequencycm**-1stat.error;em.freq;phys.atmol.transitiondoubleO-CObs.-cal. difference in the fitcm**-1stat.fit.residualdoubleJ/A+A/629/A73/mwdataMicrowave data used in the current fit of methyl mercaptan spectrumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSym1Upper level symmetry species in G6phys.atmol.element;stat.maxcharm1Upper free rotor m quantum numberphys.atmol.qn;stat.maxintJ1Upper J quantum numberinstr.det.qe;stat.maxintKa1Upper Ka quantum numberphys.atmol.qn;stat.maxintKc1Upper Kc quantum numberphys.atmol.qn;stat.maxintSym0Lower level symmetry species in G6phys.atmol.element;stat.mincharm0Lower free rotor m quantum numberphys.atmol.qn;stat.minintJ0Lower J quantum numberinstr.det.qe;stat.minintKa0Lower Ka quantum numberphys.atmol.qn;stat.minintKc0Lower Kc quantum numberphys.atmol.qn;stat.minintFreqMeasured transition frequencyMHzem.freq;phys.atmol.transitiondoubleUncMeasurement uncertainty of transition frequencyMHzstat.error;em.freq;phys.atmol.transitionfloatO-CObs.-cal. difference in the fitMHzstat.fit.param;arith.diffdoubleComSource of the data (1)meta.notecharJ/A+A/629/A73/predictPredicted transitions of the vt=0,1,2 torsional states of methyl mercaptan in 1-2000GHz rangeJ0Lower J quantum numberinstr.det.qe;stat.minintKa0Lower Ka quantum numberphys.atmol.qn;stat.minintKc0Lower Kc quantum numberphys.atmol.qn;stat.minintFreqPredicted transition frequencyMHzem.freq;phys.atmol.transitiondoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSym1Upper level symmetry species in G6phys.atmol.element;stat.maxcharm1Upper free rotor m quantum numberphys.atmol.qn;stat.maxintJ1Upper J quantum numberinstr.det.qe;stat.maxintKa1Upper Ka quantum numberphys.atmol.qn;stat.maxintKc1Upper Kc quantum numberphys.atmol.qn;stat.maxintSym0Lower level symmetry species in G6phys.atmol.element;stat.mincharm0Lower free rotor m quantum numberphys.atmol.qn;stat.minintUncPredicted uncertainty of transition frequencyMHzstat.error;em.freq;phys.atmol.transitionfloatElowThe energy of the lower statecm**-1phys.energydoublemu2SLinestrength multiplied by dipole moment squaredD**2phys.mol.dipolefloat