J/A+A/619/A92ivo://CDS.VizieR/J/A+A/619/A92doi:10.26093/cds/vizier.36190092CDSBermuez C.Tercero B.Motiyenko R.A.Margules L.Cernicharo J.,Ellinger Y.Guillemin J.-C.2018-11-23T07:54:10Z2018-11-12T08:46:41ZCDS support team

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

cds-question@unistra.fratomic-physicsinterstellar-mediumThe analysis of isomeric species of a compound observed in the interstellar medium is a useful tool to understand the chemistry of complex organic molecules. It could, likewise, assist to detect new species. Our goal consists on analyzing one of the two most stable species of the C_3_H_4_O family, methyl ketene, whose actual rotational parameters are not precise enough to allow its detection in the ISM. The obtained parameters will be used to search for it in the high-mass star-forming regions Orion KL and Sagittarius B2 as well as in the cold dark clouds TMC-1 in Taurus Molecular Cloud and Barnard 1 (B1-b).2018A&A...619A..92Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/619/A92CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/493/565 : Deuterated and ^15^N ethyl cyanides (Margules+, 2009)J/A+A/538/A51 : Rotational spectrum of CH_3_CH(NH_2_)CN (Mollendal+, 2012)J/A+A/538/A119 : Spectrum of ^18^O-methyl formate (HCO^18^OCH_3_) (Tercero+ 20J/A+A/540/A51 : Submm spectrum of deuterated glycolaldehydes (Bouchez+, 2012)J/A+A/543/A46 : Submillimeter spectrum of HCOOCD_2_H (Coudert+, 2012)J/A+A/543/A135 : New analysis of ^13^C-CH_3_CH_2_CN up to 1THz (Richard+, 2012)J/A+A/544/A82 : Rotational spectroscopy of diisocyanomethane (Motiyenko+ 2012)J/A+A/548/A71 : Spectroscopy and ISM detection of formamide (Motiyenko+, 2012)J/A+A/549/A96 : mm and sub-mm spectra of 13C-glycolaldehydes (Haykal+ 2013)J/A+A/549/A128 : Singly deuterated isotopologues of formamide (Kutsenko+, 2013)J/A+A/552/A117 : Mono-deuterated dimethyl ether (Richard+, 2013)J/A+A/553/A84 : (Sub)mm spectrum of deuterated methyl cyanides (Nguyen+, 2013)J/A+A/559/A44 : Rotational spectrum of MAAN (CH_2_NCH_2_CN) (Motiyenko+, 2013)J/ApJ/779/119 : HCOOCH_2_D detection in Orion KL (Coudert+, 2013)J/A+A/563/A137 : THz spectrum of methylamine (Motiyenko+, 2014)J/A+A/568/A58 : HCOO^13^CH_3_ rotational spectrum (Haykal+, 2014)J/A+A/579/A46 : Mono-^13^C acetaldehydes mm/submm spectra (Margules+ 2015)J/A+A/587/A152 : Rotational spectrum of ^13^C methylamine (Motiyenko+, 2016)J/A+A/590/A93 : Doubly ^13^C-substituted ethyl cyanide (Margules+, 2016)J/A+A/592/A43 : Millimeter wave spectra of carbonyl cyanide (Bteich+, 2016)J/A+A/601/A49 : CH_3_NHCHO rotational spectroscopy (Belloche+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/619/A92https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/619/A92http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/619/A92https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/619/A92https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/619/A92http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/619/A92GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/619/A92/table3Transitions included in the fit of v18=0,1 staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintm0Quantum number m for upper levelphys.atmol.qnintJ0Quantum number J for upper levelinstr.det.qeintKa0Quantum number Ka for upper levelphys.atmol.qnintKc0Quantum number Kc for upper levelphys.atmol.qnintm1Quantum number m for lower levelphys.atmol.qnintJ1Quantum number J for lower levelinstr.det.qeintKa1Quantum number Ka for lower levelphys.atmol.qnintKc1Quantum number Kc for lower levelphys.atmol.qnintFreqMeasured frequencyMHzem.freqdoubleuncUncertainty associated to frequencyMHzstat.errorfloatO-CDifference between calculated and observed frequencyMHzem.freq;arith.difffloatJ/A+A/619/A92/table4Transitions of v18=0,1 states predicted from fitKc1Quantum number Kc for lower levelphys.atmol.qnintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintm0Quantum number m for upper levelphys.atmol.qnintJ0Quantum number J for upper levelinstr.det.qeintKa0Quantum number Ka for upper levelphys.atmol.qnintKc0Quantum number Kc for upper levelphys.atmol.qnintm1Quantum number m for lower levelphys.atmol.qnintJ1Quantum number J for lower levelinstr.det.qeintKa1Quantum number Ka for lower levelphys.atmol.qnintFreqCalculated frequencyMHzem.freqdoubleunc? Uncertainty associated to calculationMHzstat.errordoublenullableSmu2Transition strength: mu^2^*SD**2spect.line.intensitydoubleAupEinstein coefficientsphys.atmol.transProbdoubleElowEnergy of the lower state levelcm**-1phys.energy;phys.atmol.leveldouble