J/A+A/589/A36ivo://CDS.VizieR/J/A+A/589/A36doi:10.26093/cds/vizier.35890036CDSGonneau A.Lancon A.Trager S.CAringer B.Lyubenova M.Nowotny W.,Peletier R.FPrugniel P.Chen Y.-P.Dries M.Choudhury O.S.,Falcon-Barroso J.Koleva M.Meneses-Goytia S.Sanchez-Blazquez P.,Vazdekis A.2017-12-22T05:33:27Z2016-04-14T08:42:14ZCDS support team

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

cds-question@unistra.frcarbon-starsspectroscopyWe provide a new collection of spectra of 35 carbon stars obtained with the ESO/VLT X-shooter instrument as part of the X-shooter Spectral Library project. The spectra extend from 0.3um to 2.4um with a resolving power above ~8000. The sample contains stars with a broad range of (J-K) color and pulsation properties located in the Milky Way and the Magellanic Clouds. We show that the distribution of spectral properties of carbon stars at a given (J-K) color becomes bimodal (in our sample) when (J-K) is larger than about 1.5. We describe the two families of spectra that emerge, characterized by the presence or absence of the absorption feature at 1.53um, generally associated with HCN and C_2_H_2_. This feature appears essentially only in large-amplitude variables, though not in all observations. Associated spectral signatures that we interpret as the result of veiling by circumstellar matter, indicate that the 1.53um feature might point to episodes of dust production in carbon-rich Miras.2016A&A...589A..36Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/589/A36CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/589/A36https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/589/A36http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/589/A36https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/589/A36https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/589/A36http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/589/A36GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/589/A36/table (Properties of our sample of 35 carbon stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/589/A36/table?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/589/A36/table?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/589/A36/table?GETtext/xml+votable180.050000true6.7021667-71.54736110.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/589/A365/8274 6/19086 33036 33048 33051 33053 33077 33091 33120 33295 33304 33323 34580 37303 37936 39766 41713 44644 47814https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/589/A36?format=asciiOpticaldefaultJ/A+A/589/A36/tableProperties of our sample of 35 carbon starsspspectrummeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the star (from table 1)meta.id;meta.maincharRAJ2000Right ascension (J2000) (from table 1)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (from table 1)pos.eq.dec;meta.mainHostHost galaxy (from table 1)meta.id.parentcharESOPerESO observing period (from table 1)meta.codecharOBidESO observing block identification number (from table 1)meta.idintMJDModified Julian Date (from table 1)dtime.epochdoubleFluxIssueNote about the flux calibration issue (from table 1) (1)meta.codecharGroup? Group classification (from table 1)meta.code.classintnullable1.53um?[Y] Presence of the 1.53 micron feature (from table 1) (2)meta.codecharInputCatInput catalog used in the initial construction of the X-shooter sample (from table B.1) (3)meta.bibcharPer? Period of the star (from table B.1) (4)dtime.periodintnullableu_PerUncertainty flag on Permeta.code.errorcharl_Amp[~<] Limit flag on Ampmeta.code.errorcharAmp? Amplitude of variation (from table B.1) (5)magarith.rate;phot.magfloatnullablen_AmpNote on amplitudemeta.notecharBand[VIK] Band used for the period and amplitude determination (from table B.1)instr.bandpasscharr_AmpReference used for the period and amplitude determination (from table B.1) (3)meta.ref;pos.framecharVarTypeVariability types (from table B.1) (6)src.varcharr_LCLight curves references (from table B.1)meta.ref;pos.framecharn_LCLight curves description (from table B.1) (7)meta.notecharKmagK magnitude taken from 2MASS (Cutri et al., 2003, Cat. II/246) (from table B.1)magphot.mag;em.IR.KfloatJ-K(J-K) color taken from 2MASS (Cutri et al., 2003, Cat. II/246) (from Table B.1)magphot.color;em.IR.J;em.IR.KfloatMbolAbsolute bolometric magnitude (from table B.1) (8)magphys.magAbs.bolfloatn_Mbol[)] ) indicates apparent bolometric magnitudemeta.notecharr_MbolReferences used for the bolometric magnitudes (from table B.1) (3)meta.ref;pos.framecharR-I? R-I color index derived by us (from table E.1) (9)magphot.color;em.opt.R;em.opt.IfloatnullableR-H? R-H color index derived by us (from table E.1) (9)magphot.color;em.opt.R;em.IR.HfloatnullableI-H? I-H color index derived by us (from table E.1) (9)magphot.color;em.opt;em.IRfloatnullableI-Ks? I-Ks color index derived by us (from table E.1) (9)magphot.color;em.opt;em.IRfloatnullableJ-H? J-H color index derived by us (from table E.1) (9)magphot.color;em.IR.J;em.IR.HfloatnullableH-Ks? H-Ks color index derived by us (from table E.1) (9)magphot.color;em.IR.H;em.IR.KfloatnullableJ-Ks? J-Ks color dindex derived by us (from table E.1) (9)magphot.color;em.IR.J;em.IR.KfloatnullableCOH? Calculation of the ^12^CO index in the H band (from table E.2)spect.indexfloatnullableCO12? Calculation of the ^12^CO(2,0) index in the K band (at 2.29 micron) (from table E.2)spect.indexfloatnullableCO13? Calculation of the ^13^CO(2,0) index in the K band (at 2.53 micron) (from table E.2)spect.indexfloatnullableCN? Calculation of the CN index at 1.11 micron (from table E.2)spect.indexfloatnullableC2U? Calculation of the C2U index at 0.5165 micron (from table E.2)spect.indexfloatnullableC2? Calculation of the C2 index at 1.77 micron (from table E.2)spect.indexfloatnullableDIP153? Calculation of the HCN+C2H2 index at 1.53 micron (from table E.2)spect.indexfloatnullablermsH? Calculation of the high-frequency structure in the H band (from table E.2)phot.flux.density;em.IR.HfloatnullablermsK? Calculation of the high-frequency structure in the K band (from table E.2)phot.mag;em.IR.KfloatnullableObs.dateObservation datetime.epoch;obscharAssocDataAssociated Data web pagemeta.bib.pagecharFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharSimbadSimbad column added by the CDSmeta.ref.urlchar