J/A+A/638/A3ivo://CDS.VizieR/J/A+A/638/A3doi:10.26093/cds/vizier.36380003CDSMargules L.McGuirre B.A.Motiyenko R.A.Brogan C.Hunter T.,Remijan A.Guillemin J.C.2020-09-30T10:53:55Z2020-05-29T07:53:27ZCDS support team

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

cds-question@unistra.fratomic-physicsKetene was detected in the interstellar medium (ISM) in 1977. Until now, only one derivative, the ketenyl radical, has been observed in this medium. Due to its large dipole moment value, cynaoketene is one of the best candidates for possible ketene derivative detection. Aims.To date, the measurements of the rotational spectra have been limited to 60GHz. The extrapolation of the prediction in the millimeter wave domain is inaccurate and does not permit an unambiguous detection. The rotational spectra were re-investigated up to 330GHz. Using the new prediction cyanoketene was sought after in a variety of astronomical sources: NGS 63341, SgrB2(N), and ASAI sources. A total of 1594 transitions were newly assigned and fitted together with those from previous studies, reaching quantum numbers up to J=82 and K_a_=24. Watson's asymmetric top Hamiltonian in the I^r^ representation was used for the analysis; both reductions A and S were tested. Logically, the S reduction gave the best results confirming that the molecule is very close to the prolate limit. Cynaoketene was not found in ISM; upper limits to the column density were derived in each source.2020A&A...638A...3Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/638/A3CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/493/565 : Deuterated and ^15^N ethyl cyanides (Margules+, 2009)J/A+A/500/1109 : Rotational spectrum of HCOO^13^CH_3_ (Carvajal+, 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+ 2012)J/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/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 wave spectra (Margules+ 2015)J/A+A/591/A110 : ^15^NH_2_ amidogen radical rotational spectrumJ/A+A/601/A50 : Sub-millimeter spectra of 2-hydroxyacetonitrileJ/A+A/610/A44 : Ethyl isocyanide submillimeter wave spectroscopyJ/A+A/619/A92 : Laboratory analysis of methylketene (Bermuez+, 2018)J/A+A/623/A162 : Spectroscopy of CH2(CN)2 and CNCH2CN (Motiyenko+, 2019)J/A+A/624/A70 : Acetaldehyde CH_2_DCOH and CH_3_COD (Coudert+, 2019)https://cdms.astro.uni-koeln.de/classic :https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/638/A3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/638/A3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/638/A3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/638/A3https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/638/A3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/638/A3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/638/A3/s1Measured frequencies, and residuals from the global fit of the data for cyanoketeneKc'Lower Kc quantum numberphys.atmol.qn;stat.minintKa'Lower Ka quantum numberphys.atmol.qn;stat.minintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNrLine numbermeta.id;meta.mainintJ"Upper J quantum numberinstr.det.qe;stat.maxintKa"Upper Ka quantum numberphys.atmol.qn;stat.maxintKc"Upper Kc quantum numberphys.atmol.qn;stat.maxintJ'Lower J quantum numberinstr.det.qe;stat.minintFreqObserved transition frequencyMHzem.freqdoubleO-CObserved - Calculated frequenciesMHzstat.fit.residualfloatuncExperimental uncertaintyMHzstat.errorfloat