J/A+A/574/A56ivo://CDS.VizieR/J/A+A/574/A56doi:10.26093/cds/vizier.35740056CDSGong Y.Henkel C.Spezzano S.Thorwirth S.Menten K.M.Wyrowski F.,Mao R.Q.Klein B.2017-05-23T13:53:19Z2015-06-21T14:51:04ZCDS support team

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

cds-question@unistra.frvariable-starscarbon-starsspectroscopyIRC +10216 is the prototypical carbon star exhibiting an extended molecular circumstellar envelope. Its spectral properties are therefore the template for an entire class of objects. The main goal is to systematically study the 1.3cm spectral line characteristics of IRC +10216. We carried out a spectral line survey with the Effelsberg-100m telescope toward IRC +10216. It covers the frequency range between 17.8GHz and 26.3GHz (K-band). In the circumstellar shell of IRC +10216, we find 78 spectral lines, among which 12 remain unidentified. The identified lines are assigned to 18 different molecules and radicals. A total of 23 lines from species known to exist in this envelope are detected for the first time outside the Solar System and there are additional 20 lines firstly detected in IRC +10216. The potential orgin of U lines is also discussed. Assuming local thermodynamic equilibrium (LTE), we determine rotational temperatures and column densities of 17 detected molecules. Molecular abundances relative to H_2_ are also estimated. A non-LTE analysis of NH_3_ shows that the bulk of its emission arises from the inner envelope with a kinetic temperature of 70+/-20K. Evidence for NH_3_ emitting gas with higher kinetic temperature is also obtained, and potential abundance differences between various ^13^C-bearing isotopologues of HC_5_N are evaluated. Overall, the isotopic ^12^C/^13^C ratio is estimated to be 49+/-9. Finally, a comparison of detected molecules in the 1.3cm range with the dark cloud TMC-1 indicates that silicate bearing molecules are more predominant in IRC +10216.2015A&A...574A..56Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/574/A56CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/330/676 : IRC+10216 Silicon and sulfur chemistry (Willacy+ 1998)J/A+A/545/A12 : Chemistry of IRC+10216 inner wind modelled (Cherchneff, 2012)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 293-355GHz (Patel+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/574/A56https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/574/A56http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/574/A56https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/574/A56https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/574/A56http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/574/A56GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/574/A56/list (Spectrum information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/574/A56/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/574/A56/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/574/A56/list?GETtext/xml+votable180.050000true146.988867213.27932290.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/574/A566/4365https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/574/A56?format=asciiOpticaldefaultJ/A+A/574/A56/listSpectrum informationObsDateObservation date (YYYY-MM-DDThh:mm:ss.sss)stime.epoch;obsnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAB1950Right Ascension of center (B1950)degpos.eq.ra;meta.mainDEB1950Declination of center (B1950)degpos.eq.dec;meta.mainNx[140001] Number of channelsmeta.number;phys.atmol.numberintDfreq0[-4.27246] Lower value of frequency interval relative to restfrequency (22GHz)GHzem.freqdoubleDfreq1[4.27246] Upper value of frequency intervalGHzem.freqdoubledFreq[61035.2] Channel widthHzspect.resolutionfloatsize[557] Size of FITS fileKibytephys.size;meta.fitsintspShow the spectrummeta.ref.urlcharfitsDownload the FITS filemeta.ref.urlcharFileNameName of FITS filemeta.id;meta.fitscharTitleTitle of the filemeta.title;meta.filecharAssocDataAssociated Data web pagemeta.bib.pagechar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexed