J/A+A/649/A60ivo://CDS.VizieR/J/A+A/649/A60doi:10.26093/cds/vizier.36490060CDSZou L.Guillemin J.-C.Motiyenko R.A.Margules L.2021-07-05T12:09:08Z2021-05-14T08:11:46ZCDS support team

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

cds-question@unistra.fratomic-physicsspectroscopyAmong the six atoms of N-containing molecules with the formula of CH_3_NO, only formamide (H_2_NCHO), the most stable structural isomer, has been detected in the interstellar medium (ISM). The formaldoxime isomer may be formed, for example, by the reaction of formaldehyde (H_2_CO) or methanimine (H_2_CNH) and hydroxylamine (H_2_NOH), which are all detected in the ISM. The lack of high accuracy millimeter- and submillimeter-wave measurements hinders the astronomical search for formaldoxime. The aim of this work is to provide the direct laboratory measurement of the millimeter- and submillimeter-wave spectrum of trans-formaldoxime. Formaldoxime was synthesized and its rotational spectrum was recorded at room temperature in a glass flow cell using the millimeter- and submillimeter-wave spectrometer in Lille. The SPFIT program in the CALPGM suite was used to fit the spectrum. Rotational lines of trans-formaldoxime from both the ground state and v_12_=1 vibrational excited states have been measured and assigned from 150 to 660GHz. Spectroscopic constants were derived to the tenth order using both Watson's A and S reduction Hamiltonian.2021A&A...649A..60Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/649/A60CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/649/A60https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/649/A60http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/649/A60https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/649/A60https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/649/A60http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/649/A60GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/649/A60/table4Measured frequency CH_2_NOH g.s.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ"Quantum number J of the upper statephys.atmol.configurationintKa"Quantum number Ka of the upper statephys.mol.qnintKc"Quantum number Kc of the upper statephys.mol.qnintvdummy"Dummy quantum number v of the upper state (1)phys.mol.qnintF"Quantum number F of the upper statephys.mol.qnintJ'Quantum number J of the lower statephys.atmol.configurationintKa'Quantum number Ka of the lower statephys.mol.qnintKc'Quantum number Kc of the lower statephys.mol.qnintvdummy'Dummy Quantum number v of the lower state (1)phys.mol.qnintF'Quantum number F of the lower statephys.mol.qnintFreqLine frequency observedMHzphys.mol.qndoubleRelIntRelative intensity for blended lines (2)MHzspect.line.intensity;arith.ratiofloatDiffFrequency difference (obs - calc)MHzem.freqdoubleUncLine frequency uncertaintyMHzstat.errorfloatRefReference of the observed line (3)meta.ref;pos.frame;spect.linecharJ/A+A/649/A60/table5Measured frequency CH_2_NOH v12=1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ"Quantum number J of the upper statephys.atmol.configurationintKa"Quantum number Ka of the upper statephys.mol.qnintKc"Quantum number Kc of the upper statephys.mol.qnintvdummy"Dummy quantum number v of the upper state (1)phys.mol.qnintF"Quantum number F of the upper statephys.mol.qnintJ'Quantum number J of the lower statephys.atmol.configurationintKa'Quantum number Ka of the lower statephys.mol.qnintKc'Quantum number Kc of the lower statephys.mol.qnintvdummy'Dummy Quantum number v of the lower state (1)phys.mol.qnintF'Quantum number F of the lower statephys.mol.qnintFreqLine frequency observedMHzphys.mol.qndoubleRelIntRelative intensity for blended lines (2)MHzspect.line.intensity;arith.ratiofloatDiffFrequency difference (obs - calc)MHzem.freqdoubleUncLine frequency uncertaintyMHzstat.errorfloatRefReference of the observed line (3)meta.ref;pos.frame;spect.linecharJ/A+A/649/A60/tablea1*Prediction of CH2NOH pure rotationalrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreq[1455.7529/999659.1104] Frequency of the lineMHzem.freqdoublee_FreqEstimated error of Freq (1)MHzstat.errordoublelogIntBase 10 log of the integrated intensitylog(nm**2.MHz)spect.line.intensityfloatDOF[3] Degrees of freedomstat.fit.dofintEloLower state energycm**-1phys.energy;phys.atmol.leveldoubleGupUpper state degeneracyphys.electron.degenintTag[45999] Species tagmeta.noteintQNFMT[1404] Quantum number (QN) format identifiermeta.idintJ"[1/50] QN J of the upper statephys.atmol.configurationintKa"[0/33] QN Ka of the upper state (1)phys.molintKc"[0/49] QN Kc of the upper statephys.molintv"[0/1] QN v of the upper state (0 for gs & 1 for v12=1)phys.molintJ'[0/50] QN J of the lower statephys.atmol.configurationintKa'[0/33] QN Ka of the lower statephys.molintKc'[0/50] QN Kc of the lower statephys.molintv'[0/1] QN v of the lower state (0 for gs & 1 for v12=1)phys.molintJ/A+A/649/A60/tablea2*Prediction of CH_2_NOH hyperfineTag[45999] Species tagmeta.noteintGupUpper state degeneracyphys.electron.degenintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreq[4590.4839/999661.3492] Frequency of the lineMHzem.freqdoublee_FreqEstimated error on Freq (1)MHzstat.errordoublelogIntBase 10 log of the integrated intensitylog(nm**2.MHz)spect.line.intensitydoubleDOF[3] Degrees of freedomstat.fit.dofintEloLower state energycm**-1phys.energy;phys.atmol.leveldoubleQNFMT[1405] Quantum number (QN) format identifiermeta.idintJ"[1/51] QN J of the upper statephys.atmol.configurationintKa"[0/31] QN Ka of the upper state (1)phys.molintKc"[0/50] QN Kc of the upper statephys.molintv"[0/1] QN v of the upper state (0 for gs & 1 for v12=1)phys.molintF"[0/50] QN F of the lower statephys.molintJ'[0/51] QN J of the lower statephys.atmol.configurationintKa'[0/31] QN Ka of the lower statephys.molintKc'[0/51] QN Kc of the lower statephys.molintv'[0/1] QN v of the lower state (0 for gs & 1 for v12=1)phys.molintF'[0/50] QN F of the lower statephys.molint