J/A+A/385/884ivo://CDS.VizieR/J/A+A/385/884doi:10.26093/cds/vizier.33850884CDSFujii T.Nakada Y.Parthasarathy M.2017-09-22T16:16:30Z2002-07-14T21:44:42ZCDS support team

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

cds-question@unistra.frgiant-starsinfrared-sourcesinfrared-photometryvisible-astronomybroad-band-photometryBVRIJHK photometric observations are presented for 27 post-AGB candidates. Almost all objects show a double peaked spatial energy distribution (SED) curve in the optical to far-infrared wavelengths. Seventeen objects were classified as post-AGB stars on the basis of their spectral type, location in the IRAS color-color diagram and SED. The physical parameters of the observed post-AGB stars, the inner radius of the detached shell, the mass of the shell and the distance were derived using the simple dust shell model. We compared our observational sequence of post-AGB objects to the theoretical evolutionary sequence (Schoenberner, 1983ApJ...272..708S; Bloecker, 1995, Cat. <J/A+A/299/755>) in the stellar temperatures versus age diagram. We found that two post-AGB stars, IRAS 05040+4820 and 08187-1905, have low stellar temperature with a large dynamical age of the dust shell. They appear to provide the first observational evidence that some low-mass stars bypass the planetary nebulae stage because of their slow increase in stellar temperature.2002A&A...385..884Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/385/884CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)J/ApJS/92/125 : Post-AGB evolution (Vassiliadis+, 1994)J/A+A/299/755 : Stellar evolution. II. Post-AGB (Bloecker+, 1995)J/A+A/323/469 : Optical spectra of post-AGB stars (Bakker+ 1997)J/PAZh/26/705 : UBV observations of post-AGB supergiants (Arkhipova+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/385/884https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/385/884http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/385/884https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/385/884https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/385/884http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/385/884GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/385/884/table1 (Infrared properties of candidates from IRAS-PSC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/385/884/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/385/884/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/385/884/table1?GETtext/xml+votable180.050000true33.425416776.25055560.0055555555555555566/1229 1264 1813 3080 3262 3986 7064 13729 14323 20849 21274 21337 21458 22069 22085 22392 22800 22861 23003 23013 23695 23707 23889 23982 24079 39935 40555https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/385/884?format=asciiOpticalInfrareddefaultJ/A+A/385/884/table1Infrared properties of candidates from IRAS-PSCrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/27] Sequential numbermeta.recordintprimaryn_Seq[*] *: note in notes.dat filemeta.notecharIRASIRAS designation (G1)meta.idcharONameSAO or HD name of associated optical objectmeta.notecharF12um? Flux density at 12{mu}mJyphot.flux.density;em.IR.8-15umfloatnullableF25um? Flux density at 25{mu}mJyphot.flux.density;em.IR.15-30umfloatnullableF60um? Flux density at 60{mu}mJyphot.flux.density;em.IR.30-60umfloatnullableF100um? Flux density at 1002{mu}mJyphot.flux.density;em.IR.60-100umfloatnullableVAR? Percent likelihood of variabilitysrc.var.indexintnullableGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latfloatq_F12um? Quality index for F12um (1)meta.code.qualintnullableq_F25um? Quality index for F25um (1)meta.code.qualintnullableq_F60um? Quality index for F60um (1)meta.code.qualintnullableq_F100um? Quality index for F100um (1)meta.code.qualintnullableNameName of the object (only for Seq 27)meta.idcharSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/385/884/table3Central star's properties and extinction propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/27] Sequential numbermeta.recordintIRASIRAS name (G1)meta.idcharSpTypeSpectral typesrc.spTypecharn_SpType[e] e: Assumptionmeta.notecharChemType[C] Chemical type, C: carbon-rich objectsrc.classcharTstar? Stellar temperatureKphys.temperature.effectiveintnullable(B-V)0? Dereddened (B-V) colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullable(B-V)obs? Observed (B-V) colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableE(B-V)? Reddeningmagphot.color.excessfloatnullableAV1? Interstellar extinction derived from intrinsic and observed B-V (1)magphys.absorptionfloatnullablen_AV1[f] Note on AV1 (2)meta.notecharAV2? Interstellar extinction derived from interstellar extinction mapsmagphys.absorptionfloatnullabler_SpType[A-K] References (3)meta.ref;pos.framecharTypeObject typesrc.classcharNameName when no IRAS name (only for Seq 27)meta.idcharJ/A+A/385/884/table4Derived fitting parameters of each Post-AGB candidaterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.recordintIRASIRAS namemeta.idcharTstarStellar temperatureKphys.temperature.effectiveintTdustDust temperatureKphys.temperature.effectiveinttdynDynamical timeyrtime.ageintdM/dtDust+gas mass-loss rate (M_Dust+gas_*10^-4^M_{sun}/yr)solMassphys.mass.lossfloatAV3Interstellar extinction derived from the model fitting.magphys.absorptionfloatDfitDerived distances using the model fitting (L=8000L_{sun}_)pcpos.distanceintDVDerived distances assuming M_V_=M_bol,8000{SUN}_-B.C.pcpos.distanceintJ/A+A/385/884/notesIndividual notesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/24] Sequential numbermeta.recordintIRASIRAS designationmeta.idcharNotetext of the notemeta.noteJ/A+A/385/884/table2Photometric observations of Post-AGB candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/27] Sequential numbermeta.recordintIRASIRAS name (G1)meta.idcharBmag? B magnitude (1)magphot.mag;em.opt.BfloatnullableVmag? V magnitude (1)magphot.mag;em.opt.VfloatnullableRcmag? Cousins R magnitude (1)magphot.mag;em.opt.RfloatnullableIcmag? Cousins I magnitude (1)magphot.mag;em.opt.IfloatnullableJmag? J magnitude (1)magphot.mag;em.IR.JfloatnullableHmag? H magnitude (1)magphot.mag;em.IR.Hfloatnullablel_KmagLimit flag on Kmagmeta.code.errorcharKmag? K magnitude (1)magphot.mag;em.IR.KfloatnullableDateOOptical observation datetime.epoch;obsnullableDateIRNearIR observation datetime.epoch;obsnullableNameName when no IRAS name (only for Seq 27)meta.idchar