J/A+A/579/A46ivo://CDS.VizieR/J/A+A/579/A46doi:10.26093/cds/vizier.35790046CDSMargules L.Motiyenko R.A.Ilyushin V.V.Guillemin J.-C.2017-06-19T07:57:12Z2015-06-30T15:01:47ZCDS support team

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

cds-question@unistra.fratomic-physicsradio-spectroscopyThe acetaldehyde molecule is ubiquitous in the interstellar medium of our galaxy, and due to its dense and complex spectrum, large dipole moment, and several low-lying torsional states, acetaldehyde is considered to be a "weed" molecule for radio astronomy observations. Mono-^13^C acetaldehydes ^13^CH_3_CHO and CH_3_^13^CHO are likely to be identified in astronomical surveys, such as those available with the very sensitive ALMA telescope. Laboratory measurements and analysis of the millimeter and submillimeter-wave spectra are the prerequisites for the successful radioastronomical search for the new interstellar molecular species, as well as for new isotopologs of already detected interstellar molecules. In this context, to provide reliable predictions of ^13^CH_3_CHO and CH_3_^13^CHO spectra in millimeter and submillimeter wave ranges, we study rotational spectra of these species in the frequency range from 50 to 945GHz. The spectra of mono-^13^C acetaldehydes were recorded using the spectrometer based on Schottky-diode frequency-multiplication chains in the Lille laboratory. The rotational spectra of ^13^CH_3_CHO and CH_3_^13^CHO molecules were analyzed using the Rho axis method.2015A&A...579A..46Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/579/A46CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/579/A46https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/579/A46http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/579/A46https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/579/A46https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/579/A46http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/579/A46GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadiodefaultJ/A+A/579/A46/measureAssignments, measured transition frequencies, and residuals from the global fit of the microwave, millimeter-wave and submillimeter-wave vt=0,1,2 for ^13^C acetaldehydesCSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpSimbad column added by the CDSmeta.id;phys.molcharSy1Upper level symmetry in the G6 group: E, A1 or A2phys.atmol.paritycharvt1[0/2] Upper level torsional quantum numberphys.atmol.qnintJ1[1/60] Upper level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintKa1[0/22] Upper level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintKc1[0/55] Upper level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintSy0Lower level symmetry in the G6 group: E, A1 or A2phys.atmol.paritycharvt0[0/2] Lower level torsional quantum numberphys.atmol.qnintJ0[0/60] Lower level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintKa0[0/22] Lower level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintKc0[0/56] Lower level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintPos[9513/944843] Measured line positionMHzem.freqdoubleindexede_Pos[0.03/4] Uncertainty of PosMHzstat.errorfloatO-C[-1.1/9.4] Residuals from the global fitMHzem.freqfloatRefSource of data (1)meta.bibcharBlend[b] b for blended linesmeta.codecharDelta[-0.4/0.3]? Differences between the intensity-weighted average of calculated (but experimentally unresolved) transition wavenumbers (or frequencies in case of microwave data) and the observed position of the cluster of blended linesMHzem.freqfloatnullableJ/A+A/579/A46/QrtTorsion-rotation part Qrt(T) of the total internal partition function Q(T)=Qv(T)*Qrt(T), calculated from first principlesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintT[10/300] Temperature (1)Kphys.temperatureintQrt(A+E)A+E parts of the torsion-rotation part of partition functionphys.atmoldoubleQrt(A)? A part of the torsion-rotation part of partition functionphys.atmoldoublenullableQrt(E)? E part of the torsion-rotation part of partition functionphys.atmoldoublenullableSpSimbad column added by the CDSmeta.id;phys.molcharJ/A+A/579/A46/calculList of calculated positions and assignments of A-A and E-E transitions in the vt=0,1 torsional states of ^13^C acetaldehyde up to J=65 in the 1-1000GHz frequency rangeMSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpSimbad column added by the CDSmeta.id;phys.molcharSy1Upper level symmetry in the G6 group: E, A1 or A2phys.atmol.paritycharvt1[0/1] Upper level torsional quantum numberphys.atmol.qnintJ1[1/65] Upper level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintKa1[0/25] Upper level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintKc1[0/61] Upper level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintSy0Lower level symmetry in the G6 group: E, A1 or A2phys.atmol.paritycharvt0[0/1] Lower level torsional quantum numberphys.atmol.qnintJ0[0/65] Lower level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintKa0[0/25] Lower level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintKc0[0/62] Lower level asymmetric top rotational quantum numberphys.atmol.qn;phys.mol.rotationintPos[1001/999998] Measured line position (1)MHzem.freqdoubleindexede_Pos[0.0001/0.1] Uncertainty of PosMHzstat.errorfloatE0[0/1633] Lower state energycm**-1phys.energy;phys.atmol.leveldoublemu2SDipole moment squared multiplied by the transition linestrength {mu}^2^SD**2physdouble