J/A+A/504/635ivo://CDS.VizieR/J/A+A/504/635doi:10.26093/cds/vizier.35040635CDSEndres C.P.Drouin B.J.Pearson J.C.Muller H.S.P.Lewen F.,Schlemmer S.Giesen T.F.2009-11-22T17:08:49Z2009-11-22T18:00:55ZCDS support team

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

cds-question@unistra.fratomic-physicsDimethyl ether (CH_3_OCH_3_) is one of the largest organic molecules detected in the interstellar medium. As an asymmetric top molecule with two methyl groups which undergo large amplitude motions and a dipole moment of mu_b_=1.3D it conveys a dense spectrum throughout the terahertz region and contributes to the spectral line confusion in astronomical observations at these frequencies. Rotational spectra of dimethyl ether in its ground vibrational states are presented in this paper, which have been measured in the laboratory and analyzed covering frequencies up to 2.1THz. The analysis is based on an effective Hamiltonian for a symmetric two-top rotor and includes experimental data published so far. Frequency predictions are presented up to 2.5THz for astronomical applications with accuracies better than 1MHz.2009A&A...504..635Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/504/635CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/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/A+A/504/635https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/504/635http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/504/635https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/504/635https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/504/635http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/504/635GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/504/635/tablea1Assigned and fitted transition frequencies of dimethyl ether in the ground vibrational staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinttTorsional substates (1)meta.noteintJ'J' rotational quantum numberphys.atmol.qn;phys.mol.rotationintK'aK'a rotational quantum numberphys.atmol.qn;phys.mol.rotationintK'cK'c rotational quantum numberphys.atmol.qn;phys.mol.rotationintJ"J" rotational quantum numberinstr.det.qe;phys.mol.rotationintK"aK"a rotational quantum numberphys.atmol.qn;phys.mol.rotationintK"cK"c rotational quantum numberphys.atmol.qn;phys.mol.rotationintFreqFrequencyMHzem.freqdoublee_Freqrms uncertainty on FreqMHzstat.errorfloatO-CObserved minus calculated frequencyMHzstat.fit.residualfloatSourceSource (2)meta.bibchar