J/A+A/368/250ivo://CDS.VizieR/J/A+A/368/250doi:10.26093/cds/vizier.33680250CDSArellano Ferro A.Giridhar S.Mathias P.2003-12-29T20:56:03Z2003-12-29T21:55:52ZCDS support team

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

cds-question@unistra.frprotostarsplanetary-nebulaeline-intensitiesradial-velocityDetailed atmospheric abundances have been calculated for a sample of A-G supergiant stars with IR fluxes and/or high galactic latitudes. HD 172481 and HD 158616 show clear indications of being post-AGB stars that have experienced third dredge-up. HD 158616 is carbon-rich while the abundance pattern of HD 172481 and its large Li enhancement gives support to the hot bottom burning scenario that explains paucity of carbon-rich stars among AGB stars. HD 172324 is very likely a hot post-AGB star that shows a strong carbon deficiency. HD 725, HD 218753 and HD 331319 also appear to be evolved objects between the red giant and the AGB. HD 9167, HD 173638 with a few exceptions, reflect solar abundances and no signs of post red giant evolution. They are most likely young massive disk supergiants. Further analysis of proto-Planetary Nebula HDE 341617 reveals that He lines show signs of velocity stratification. The emission lines have weakened considerably since 1993. The envelope expands at 19km/s relative to the star. Atmospheric abundances, evolutionary tracks and isochrones are used to estimate masses and ages of all stars in the sample.2001A&A...368..250Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/368/250CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/368/250https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/368/250http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/368/250https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/368/250https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/368/250http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/368/250GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/368/250/table11Absorption lines identified in the spectrum of the proto-Planetary Nebula HDE 341617.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonIon designationphys.atmol.ionizationcharlambdaObsObserved wavelength0.1nmem.wldoublelambdaLab? Laboratory wavelength (1)0.1nmem.wl;phys.atmol.transitiondoublenullablen_lambdaLab[/+] Note on lambdaLab2 (2)meta.notecharlambdaLab2? Second value of laboratory wavelength (2)0.1nmem.wl;phys.atmol.transitiondoublenullableEW? Equivalent width0.1pmspect.line.eqWidthfloatnullableRV? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullableJ/A+A/368/250/table12Emission lines identified in the spectrum of the proto-Planetary Nebula HDE 341617recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonIon designationphys.atmol.ionizationcharlambdaObsObserved wavelength0.1nmem.wldoublelambdaLab? Laboratory wavelength (1)0.1nmem.wl;phys.atmol.transitiondoublenullablen_lambdaLab[/+] Note on lambdaLab2 (2)meta.notecharlambdaLab2? Second value of laboratory wavelength (2)0.1nmem.wl;phys.atmol.transitiondoublenullableEW? Equivalent width0.1pmspect.line.eqWidthfloatnullableRV? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullable