J/A+A/332/721ivo://CDS.VizieR/J/A+A/332/721doi:10.26093/cds/vizier.33320721CDSPerinotto M.Corradi R.1998-04-25T13:55:02Z1998-04-25T13:53:30ZCDS support team

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

cds-question@unistra.frplanetary-nebulaechemical-abundancesLong slit spectrophotometry of 13 bipolar planetary nebulae has been used to study their physical and chemical properties. In each nebula, one to seven different spatial regions have been considered in order to search for possible abundance variations through the nebulae. We obtained the following main results: - within the errors, the He, O, and N abundances are constant through all the nebulae. - the Ne, Ar, and S abundances are also constant, within the errors, but their face values have systematic increases toward the outer regions of the nebulae. These trends may be attributed to inaccuracies in the ionization correction factors, as predicted by Alexander & Balick (1997AJ....114..713A) for long-slit observations of extended PNe. The corresponding increase of the N abundance predicted by those authors is, however, generally not observed (with one exception). - The present sample contains some of the Galactic PNe with the highest He and N/O abundances known to date (M 3-2, He 2-111, NGC 6537). The highest He overabundances cannot by reproduced by any current model of AGB evolution. - Oxygen depletion is suggested for the nebulae with the highest N/O abundances, indicating that efficient ON cycle process has occurred in their progenitors.1998A&A...332..721Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/332/721CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/332/721https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/332/721http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/332/721https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/332/721https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/332/721http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/332/721GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/332/721/fluxesObserved line fluxesPNPlanetary nebula namemeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLineLine identificationmeta.idn3? Third region on the western lobe relative abundance (1)meta.codefloatnullablen2? Second region on the western lobe relative abundance (1)meta.codefloatnullablen1? First region on the western lobe relative abundance (1)src.classfloatnullablecen? Central region relative abundance (1)phys.abundfloatnullablep1? First region on the eastern lobe relative abundance (1)stat.fit.paramfloatnullablep2? Second region on the eastern lobe relative abundance (1)stat.fit.paramfloatnullableP3? Third region on the eastern lobe relative abundance (1)stat.fit.goodnessfloatnullableJ/A+A/332/721/abundAbundancesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPNPN namemeta.id;meta.maincharprimaryIonIon/Elementphys.atmol.ionizationLineLine identificationmeta.idcharn3? Abundance in the third region on the western lobemeta.codedoublenullablee_n3? rms uncertainty on n3stat.errorintnullablen2? Abundance in the second region on the western lobemeta.codedoublenullablee_n2? rms uncertainty on n2stat.errorintnullableu_n2Uncertainty flag on n2meta.code.errorcharn1? Abundance in the first region on the western lobesrc.classdoublenullablee_n1? rms uncertainty on n1stat.errorintnullableu_n1Uncertainty flag on n1meta.code.errorcharcen? Abundances in the central regionphys.abund.Xdoublenullablee_cen? rms uncertainty on censtat.errorintnullableu_cenUncertainty flag on cenmeta.code.errorcharp1? Abundance in the first region on the eastern lobestat.fit.paramdoublenullablee_p1? rms uncertainty on p1stat.errorintnullableu_p1Uncertainty flag on p1meta.code.errorcharp2? Abundance in the second region on the eastern lobestat.fit.paramdoublenullablee_p2? rms uncertainty on p2stat.errorintnullableu_p2Uncertainty flag on p2meta.code.errorcharp3? Abundance in the third region on the eastern lobestat.fit.paramdoublenullablee_p3? rms uncertainty on p3stat.errorintnullableJ/A+A/332/721/denElectronic densitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPNPlanetary nebula namemeta.id;meta.maincharprimaryNen3? Third western region lobe electronic densitycm**-3phys.densityintnullableNen2? Second western region lobe electronic densitycm**-3phys.densityintnullableNen1? First western region lobe electronic densitycm**-3phys.densityintnullableNecen? Central region electronic densitycm**-3phys.densityintnullableNep1? First eastern region lobcm**-3phys.densityintnullableNep2? Second eastern region lobe electronic densitycm**-3phys.densityintnullableNep3? Third eastern region lobe electronic densitycm**-3phys.densityintnullableJ/A+A/332/721/tnii[NII] temperaturesPNPlanetary nebula namemeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTn3? Temperature for the third western region lobeKphys.temperatureintnullablen_Tn3[a] a when adopted temperaturemeta.notecharTn2? Temperature for the second western region lobeKphys.temperatureintnullablen_Tn2[a] a when adopted temperaturemeta.notecharTn1? Temperature for the first western region lobeKphys.temperatureintnullablen_Tn1[a] a when adopted temperaturemeta.notecharTcen? Temperature for the central regionKphys.temperatureintnullableTp1? Temperature for the first eastern region lobeKphys.temperature;phys.electronintnullableTp2? Temperature for the second eastern region lobeKphys.temperature;phys.electronintnullablen_Tp2[a] a when adopted temperaturemeta.notecharTp3? Temperature for the third eastern region lobeKphys.temperature;phys.electronintnullableJ/A+A/332/721/toiii[OIII] temperaturesTp3? Temperature for the third eastern region lobeKphys.temperature;phys.electronintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPNPlanetary nebula namemeta.id;meta.maincharprimaryTn3? Temperature for the third western region lobeKphys.temperatureintnullablen_Tn3[a] a when adopted temperaturemeta.notecharTn2? Temperature for the second western region lobeKphys.temperatureintnullablen_Tn2[a] a when adopted temperaturemeta.notecharTn1? Temperature for the first western region lobeKphys.temperatureintnullablen_Tn1[a] a when adopted temperaturemeta.notecharTcen? Temperature for the central regionKphys.temperatureintnullableTp1? Temperature for the first eastern region lobeKphys.temperature;phys.electronintnullableTp2? Temperature for the second eastern region lobeKphys.temperature;phys.electronintnullablen_Tp2[a] a when adopted temperaturemeta.notechar