J/MNRAS/466/1963ivo://CDS.VizieR/J/MNRAS/466/1963doi:10.26093/cds/vizier.74661963CDSLiu J.Jiang B.W.Li A.Gao J.2024-08-17T20:17:42Z2020-04-21T15:11:46ZCDS support team

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

cds-question@unistra.frgiant-starsstellar-mass-lossinfrared-photometryvisible-astronomybroad-band-photometryFor decades ever since the early detection in the 1990s of the emission spectral features of crystalline silicates in oxygen-rich evolved stars, there is a long-standing debate on whether the crystallinity of the silicate dust correlates with the stellar mass-loss rate. To investigate the relation between the silicate crystallinities and the mass-loss rates of evolved stars, we carry out a detailed analysis of 28 nearby oxygen-rich stars. We derive the mass-loss rates of these sources by modelling their spectral energy distributions from the optical to the far-infrared. Unlike previous studies in which the silicate crystallinity was often measured in terms of the crystalline-to-amorphous silicate mass ratio, we characterize the silicate crystallinities of these sources with the flux ratios of the emission features of crystalline silicates to that of amorphous silicates. This does not require the knowledge of the silicate dust temperatures, which are the major source of uncertainties in estimating the crystalline-to-amorphous silicate mass ratio. With a Pearson correlation coefficient of ~-0.24, we find that the silicate crystallinities and the mass-loss rates of these sources are not correlated. This supports the earlier findings that the dust shells of low mass-loss rate stars can contain a significant fraction of crystalline silicates without showing the characteristic features in their emission spectra.2017MNRAS.466.1963Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/466/1963CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/466/1963https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/466/1963http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/466/1963https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/466/1963https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/466/1963http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/466/1963GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/466/1963/table1 (Photometric data of our stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/466/1963/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/466/1963/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/466/1963/table1?GETtext/xml+votable180.050000true257.8209167-32.32519720.0055555555555555566/676 1977 3253 3256-3257 3262 3272 8532 8926 9939 10107 13813 13845 14196 14236 14253 14302 14619 14689 14834 17716 28917 30606 31828 32254 33689 42489 438901.6558465556080236e-21 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/466/1963?format=asciiOpticalInfrareddefaultJ/MNRAS/466/1963/table1Photometric data of our starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000declination (J2000)pos.eq.dec;meta.mainTypeTypesrc.classcharDistDistance to Earthpcpos.distanceintn_DistDistance reference (1)meta.notecharUmag? Johnson U magnitudemagphot.mag;em.opt.UfloatnullableBmagJohnson B magnitudemagphot.mag;em.opt.BfloatVmagJohnson V magnitudemagphot.mag;em.opt.VfloatRmag? Johnson R magnitudemagphot.mag;em.opt.RfloatnullableImag? Johnson I magnitudemagphot.mag;em.opt.IfloatnullableJmag2MASS J magnitudemagphot.mag;em.IR.JfloatHmag2MASS H magnitudemagphot.mag;em.IR.HfloatKmag2MASS K magnitudemagphot.mag;em.IR.KfloatW1magWISE W1 magnitudemagphot.mag;em.IR.3-4umfloatW2magWISE W2 magnitudemagphot.mag;em.IR.4-8umfloatW3magWISE W3 magnitudemagphot.flux.density;em.IR.8-15umfloatW4magWISE W4 magnitudemagphot.flux.density;em.IR.15-30umfloatF12IRAS 12um fluxJyphot.flux.density;em.IR.8-15umfloatF25IRAS 25um fluxJyphot.flux.density;em.IR.15-30umfloatF60IRAS 60um fluxJyphot.flux.density;em.IR.30-60umfloatl_F60[L] L for upper limit in F60meta.code.errorcharF100IRAS 100um fluxJyphot.flux.density;em.IR.60-100umfloatu_F100Unvertaity flag on F100meta.code.errorcharl_F100[U] U for upper limit in F100meta.code.errorcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/466/1963/table2Stellar and circumstellar parameters and the dust mass-loss rates derived from 2-dust as well as the silicate crystallinities {eta}_csi,f_ and {eta}'_csi,f_ derived from pahfitrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharT*Stellar temperatureKphys.temperatureintL*Steallar luminositysolLumphys.luminositydoubleR*Stellar radiuscmphys.angSize;srcdoublerminMinimum radius in R* unitphys.size.radius;stat.minfloatrmaxMaximum radius in R* unitphys.size.radius;stat.maxfloatrhominMinimum densityg.cm**-3phys.density;stat.mindoubledM/dtdustDust mass loss ratesolMass/yrphys.mass.lossdoubleetaSilicate crystallinity, {eta}_csi,f_ (1)phys.atmolfloatetapSilicate crystallinity, {eta}'_csi,f_ (2)phys.atmolfloatJ/MNRAS/466/1963/table3The visual extinction AV and the J-K colour index of each objectrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharJmagObserved J magnitudemagphot.mag;em.IR.JfloatKmagObserved K magnitudemagphot.mag;em.IR.KfloatJ-K? Observed J-K colour indexmagphot.color;em.IR.J;em.IR.Kfloatnullable(J-K)int? Intrinsic J-K colour indexmagphot.color;em.IR.J;em.IR.KfloatnullableAVVisual extinctionmagphys.absorption;em.opt.VfloatRefSource of measurementsmeta.bibcharJ/MNRAS/466/1963/tab5-13The peak wavelength, FWHM and total emitted fluxes of each silicate feature (table4-table13 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharlambdaPeak wavelengthumem.wl;stat.maxfloatn_lambda[*] * for amorphous silicatemeta.notecharFWHMFWHM ({gamma}{lambda})umspect.line.widthfloatP? Total emitted flux (1)W.m**-2phot.fluxdoublenullableJ/MNRAS/466/1963/table14The mean wavelength and its range (variance) as well as the mean FWHM and its range of each crystalline silicate feature derived in this work compared with that of Molster et al. (2002A&A...382..222M)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint<lambda>Mean wavelength (this work)umem.wl;stat.meanfloatn_<lambda>[*] Note on <lambda> (this work)meta.notecharb_lambdaMinimum wavelength value (this work)umem.wl;stat.minfloatB_lambdaMaximum wavelength value (this work)umem.wl;stat.maxfloat<FWHM>Mean FWHM value (this work)umspect.line.widthfloatb_<FWHM>Minimum FWHM value (this work)umphys.angSize;stat.minfloatB_<FWHM>Maximum FWHM value (this work)umphys.angSize;stat.maxfloat<lambda>MMean wavelength (Molster et al., 2002A&A...382..222M)umem.wl;stat.meanfloatn_<lambda>M[*] Note on <lambda>Mmeta.notecharb_lambdaMMinimum wavelength (Molster et al., 2002A&A...382..222M)umem.wl;stat.minfloatB_lambdaMMaximum wavelength (Molster et al., 2002A&A...382..222M)umem.wl;stat.maxfloat<FWHM>MMean wavelength (Molster et al., 2002A&A...382..222M)umem.wl;stat.meanfloatb_<FWHM>MMinimum wavelength (Molster et al., 2002A&A...382..222M)umem.wl;stat.minfloatB_<FWHM>MMaximum wavelength (Molster et al., 2002A&A...382..222M)umem.wl;stat.maxfloat