J/A+A/658/A39ivo://CDS.VizieR/J/A+A/658/A39doi:10.26093/cds/vizier.36580039CDSPardo J.R.Cernicharo J.Tercero B.Cabezas C.Bermudez C.Agundez M.,Gallego J.D.Tercero F.Gomez-Garrido M.de Vicente P.Lopez-Perez J.A.2022-08-25T11:28:41Z2022-01-28T08:14:59ZCDS support team

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

cds-question@unistra.frvariable-starsspectroscopyThe carbon-rich envelope of the asymptotic giant branch star CW Leo, IRC+10216, is one of the richest molecular sources in the sky. Available spectral surveys below 51GHz are more than 25 years old, and new work is needed. Characterizing the rich molecular content of this source, specially for heavy species, requires carrying out very sensitive spectral surveys at low frequencies. In particular, we have achieved an rms in the range 0.2-0.6mK per MHz. Long Q band (31.0-50.3GHz) single-dish integrations were carried out with the Yebes-40m telescope using specifically built receivers. The most recent line catalogs were used to identify the lines. The data contain 652 spectral features, corresponding to 713 transitions from 81 species (we count the isomers, isotopologs, and ortho/para species separately). Only 57 unidentified lines remain with signal-to-noise ratios >=3. Some new species and/or vibrational modes have been discovered for the first time with this survey. This IRC+10216 spectral survey is by far the most sensitive survey carried out to date in the Q band. It therefore provides the most complete view of IRC+10216 from 31.0 to 50.3GHz, giving unique information about its molecular content, especially for heavy species. Rotational diagrams built from the data provide valuable information about the physical conditions and chemical content of this circumstellar envelope.2022A&A...658A..39Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/658/A39CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/330/676 : IRC+10216 Silicon and sulfur chemistry (Willacy+ 1998)J/ApJ/688/L83 : Detection of C_5_N^-^ in IRC +10216 (Cernicharo+, 2008)J/ApJS/177/275 : 1.3 and 2mm survey of IRC+10216 (He+, 2008)J/ApJS/190/348 : 1mm spectral survey of IRC+10216 + VY CMa (Tenenbaum+, 2010)J/ApJS/193/17 : Spectral-line survey of IRC+10216 at 293-355GHzJ/A+A/545/A12 : Chemistry of IRC+10216 inner wind modelledJ/A+A/574/A56 : IRC +10216 17.8GHz-26.3GHz spectrum (Gong+, 2015)J/ApJ/806/L3 : Disilicon carbide (SiCSi) discovery in CW LeoJ/A+A/601/A4 : IRC+10216 carbon chains mapped with ALMA (Agundez+, 2017)J/A+A/606/A74 : IRC +10216 13.3GHz-18.5GHz spectrum (Zhang+, 2017)J/A+A/618/A4 : IRC+10216 as a spectroscopic laboratory (Cernicharo+, 2018)J/A+A/629/A146 : ALMA data cubes for IRC+10216 (Velilla-Prieto+, 2019)J/MNRAS/489/3492 : IRC+10216 + omi Cet SCUBA-2 light curveshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/658/A39https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/658/A39http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/658/A39https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/658/A39https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/658/A39http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/658/A39GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/658/A39/tablea1Line identification and associated parameters from our 31.0-50.3 GHz observations of IRC+10216Vexp? Expansion velocitykm/sphys.veloc.expansionfloatnullableWIntegrated intensity, W={int}T_MB_dvmK.km/sspect.line.intensityintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMolMolecular speciesphysQNQuantum numbers of the transitionphys.mol.qn;phys.atmol.transitionnurestRest frequency, {nu}_rest_MHzem.freqdoublenuobs? Observed frequency, {nu}_obs_MHzem.freqdoublenullablee_nuobs? rms uncertainty on nuobs (1)MHzstat.errorfloatnullableEupUpper energy levelKphys.energy;phys.atmol.levelfloatSulLine strengthspect.line.intensityfloatRotDiagRotation diagram ln[(3*k_B_*W)/(8{pi}^3^*nu_rest_*Sul*{mu}^2^)]phys.atmolfloate_Vexp? rms uncertainty on Vexp (1)km/sstat.errorfloatnullableFigFigure numbermeta.id;meta.maincharLineAccumulated number of distinguishable linesmeta.numberint