J/A+A/684/A4ivo://CDS.VizieR/J/A+A/684/A4doi:10.26093/cds/vizier.36840004CDSUnnikrishnan R.De Beck E.Nyman L.A.Olofsson H.Vlemmings W.H.T.,Tafoya D.Maercker M.Charnley S.B.Cordiner M.A.de Gregorio I.,Humphreys E.Millar T.J.Rawlings M.G.2024-11-29T20:02:00Z2024-03-29T09:00:31ZCDS support team

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

cds-question@unistra.frcarbon-starsgiant-starsradio-astronomystellar-mass-lossradio-spectroscopychemical-abundancesinterferometryAsymptotic giant branch (AGB) stars are major contributors to the chemical enrichment of the ISM through nucleosynthesis and extensive mass loss. Most of our current knowledge of AGB atmospheric and circumstellar chemistry, in particular in a C-rich environment, is based on observations of the carbon star IRC+10216. We aim to obtain a more generalised understanding of the chemistry in C-rich AGB CSEs by studying a sample of three carbon stars, IRAS 15194-5115, IRAS 15082-4808, and IRAS 07454-7112, and test the archetypal status often attributed to IRC+10216. We performed spatially resolved, unbiased spectral surveys in ALMA Band 3. We identify a total of 132 rotational transitions from 49 molecular species. We find that, within the uncertainties of the analysis, the observed circumstellar chemistry appears very similar across our sample and compared to that of IRC+10216, both in terms of the relative location of the emitting regions and molecular abundances. This implies that, to a first approximation, the chemical models tailored to IRC+10216 are able to reproduce the observed chemistry in C-rich envelopes across roughly an order of magnitude in wind density.2024A&A...684A...4Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/684/A4CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/684/A4https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/684/A4http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/684/A4https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/684/A4https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/684/A4http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/684/A4GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/684/A4/listsp (List of fits spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/684/A4/listsp?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/684/A4/listsp?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/684/A4/listsp?GETtext/xml+votable180.050000true116.26001-71.32940.005555555555555556Cone search capability for table J/A+A/684/A4/listmap (List of fits maps of the continuum emissions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/684/A4/listmap?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/684/A4/listmap?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/684/A4/listmap?GETtext/xml+votable180.050000true116.26002-71.329390.005555555555555556Cone search capability for table J/A+A/684/A4/listcube (List of fits 3D line cubes of the emission lines observed using ALMA)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/684/A4/listcube?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/684/A4/listcube?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/684/A4/listcube?GETtext/xml+votable180.050000true116.26001-71.32940.0055555555555555566/37405 41849 41945https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/684/A4?format=asciiMillimeterRadiodefaultJ/A+A/684/A4/listspList of fits spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintbFREQLower value of frequency intervalGHzem.freqdoubleBFREQUpper value of frequency intervalGHzem.freqfloatdFREQFrequency resolutionHzspect.resolutionintsizeSize of FITS fileKibytephys.size;meta.fitsintspShow the spectrummeta.ref.urlcharFileNameName of FITS file, in subdirectory spmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharJ/A+A/684/A4/listmapList of fits maps of the continuum emissionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation datestime.epoch;obsnullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory mapsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharJ/A+A/684/A4/listcubeList of fits 3D line cubes of the emission lines observed using ALMArecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintNz? Number of pixels along Z-axismeta.numberintnullableObs.dateObservation datestime.epoch;obsnullablebVRAD? Lower value of VRAD intervalm/sphys.velocdoublenullableBVRAD? Upper value of VRAD intervalm/sphys.velocdoublenullabledVRAD? VRAD resolutionm/sspect.resolutionfloatnullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory cubesmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fits