J/A+A/520/A64ivo://CDS.VizieR/J/A+A/520/A64doi:10.26093/cds/vizier.35200064CDSCazzoli G.Puzzarini C.Stopkowicz S.Gauss J.2010-12-06T06:53:25Z2010-10-04T10:01:30ZCDS support team

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

cds-question@unistra.fratomic-physicsFormic acid, HCOOH, is the simplest organic acid and the first that has been identified in the interstellar medium. Its astrophysical relevance has motivated this spectroscopic study. The aim of this investigation is to provide very accurate rest frequencies for the trans isomer of HCOOH as well as to improve the spectroscopic and hyperfine parameters available in the literature for this molecule. The Lamb-dip technique has been exploited in order to record the rotational spectrum of trans-HCOOH at sub-Doppler resolution in the millimeter- and submillimeter-wave frequency ranges and, when possible, to resolve the hyperfine structure due to the hydrogen nuclei. THz measurements have been carried out as well. The experimental investigation has been supported by high-level quantum-chemical calculations.2010A&A...520A..64Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/520/A64CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/520/A64https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/520/A64http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/520/A64https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/520/A64https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/520/A64http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/520/A64GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/520/A64/tables1Transition frequencies and fit residualsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJRotational quantum number of the lower rotational levelphys.atmol.qn;phys.mol.rotationintKaRotational quantum number of the lower rotational levelphys.atmol.qn;phys.mol.rotationintKcRotational quantum number of the lower rotational levelphys.atmol.qn;phys.mol.rotationintF1? Hyperfine quantum number of the lower rotational levelphys.atmol.qnintnullableF? Hyperfine quantum number of the lower rotational levelphys.atmol.qnintnullableJ"Rotational quantum number of the upper rotational levelphys.atmol.qn;phys.mol.rotationintKa"Rotational quantum number of the upper rotational levelphys.atmol.qn;phys.mol.rotationintKc"Rotational quantum number of the upper rotational levelphys.atmol.qn;phys.mol.rotationintF1"? Hyperfine quantum number of the upper rotational levelphys.atmol.qnintnullableF"? Hyperfine quantum number of the upper rotational levelphys.atmol.qnintnullableFreqTransition frequencyMHzem.freqdoublee_Freqrms uncertainty on FreqMHzstat.errordoubleO-CObserved-calculated frequencykHzstat.fit.residualfloatRef[CP] Reference for data (1)meta.ref;pos.framechar