J/A+A/475/217ivo://CDS.VizieR/J/A+A/475/217doi:10.26093/cds/vizier.34750217CDSQuireza C.Rocha-Pinto H.J.Maciel W.J.2017-06-20T13:16:27Z2008-01-23T20:52:42ZCDS support team

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

cds-question@unistra.frplanetary-nebulaechemical-abundancesIn this paper we present a re-analysis of the criteria used to characterize the Peimbert classes I, IIa, IIb, III and IV, through a statistical study of a large sample of planetary nebulae previously classified according to these groups. In the original classification, it is usual to find planetary nebulae that cannot be associated with a single type; these most likely have dubious classifications into two or three types. Statistical methods can greatly contribute in providing a better characterization of planetary nebulae groups. We use the Bayes Theorem to calculate the posterior probabilities for an object to be member of each of the types I, IIa, IIb, III and IV. This calculation is particularly important for planetary nebulae that are ambiguously classified in the traditional method. The posterior probabilities are defined from the probability density function of classificatory parameters of a well-defined sample, composed only by planetary nebulae unambiguously fitted into the Peimbert types. Because the probabilities depend on the available observational data, they are conditional probabilities, and, as new observational data are added to the sample, the classification of the nebula can be improved, to take into account this new information. This method differs from the original classificatory scheme, because it provides a quantitative result of the representativity of the object within its group. Also, through the use of marginal distributions it is possible to extend the Peimbert classification even to those objects for which only a few classificatory parameters are known.2007A&A...475..217Qhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/475/217CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/84 : Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker+, 1992)V/127 : MASH Catalog of Planetary Nebulae (Parker+ 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/475/217https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/475/217http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/475/217https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/475/217https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/475/217http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/475/217GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/475/217/pne (Parameters, pre-classification and posterior classification of planetary nebulae)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/475/217/pne?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/475/217/pne?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/475/217/pne?GETtext/xml+votable180.050000true41.348612542.55137220.0055555555555555565/7179 7198 7205 7216 6/1111 1200 1223 1238 1244 1399 1552 1562 2395 2883 2887 2979 2993 3059 3152 3332 3637 3819 5996 6015 6146 6292 6654 6857 7090 9233 9461 9806 10378 11605 12222 12405 12812 12852 12857 12907 12960 12983 12992 13676 13968 13995 14005 14060 14076 14118 14198 14214 14258 14279 14282 14429 14443 14491 14592 14596 14642 14719 14796 14827 14853 15145 15172 15384 15435 15472-15473 15481 15552 15621 15639 15739 16243 16871 16886 20400 20816 20826 20829 20951 21215 21315 21523 21526 21600 21609 21732 21948 22047 22093 22137 22166 22226 22280 22478 22660 22816 23389 23658 23688 23704 23734 23949 24036 24361 24368 24484 24862 25008 28676 28680 28685 28696-28697 28699 28703-28704 28711-28712 28721-28723 28726 28728 28730-28734 28738 28745 28747 28754 28756 28766 28769-28770 28772 28774-28775 28777 28779-28780 28782-28784 28791 28796-28797 28800-28801 28804-28805 28812 28817 28819 28825 28828 28835 28837-28838 28843-28845 28847 28850 28854 28856 28860 28862 28868 28870-28871 28873 28882 28898 28904 28906-28909 28911 28917 28922-28923 28941 28943 28963 28969 28972 28975 28977 28984 29024 29032 29039 29056-29057 29062 29079 29081 29083 29086 29092 29094 29096 29121 29130 29146 29164 29168 29182 29193 29198 29200-29202 29206-29208 29213 29236 29248 29250 29254-29255 29266-29267 29278 29286 29297-29298 29317 29350 29405 29427 29442 29472 29520 29537 29539 29718 29852 29866 29886 30209 30221 30288 30308 30328 30472 30491 30511 30522 30527 30615 30656 30684 30686 30803 31318 31670 31775 31847 32070 32193 32571 34207 36130 36938 37110 37191 37234 37245 37316 37323-37324 37337 37354 37661 37710 37731 37733 37735 37835 37914-37915 37959 37963 38001 38023 38028 38034 38064 38075 38436 38475 38512 38563 39029 39143 39194 39261 39279 39775 39801 39822 39860 39935 39956 40070 40279 40510 40571 40577 40599 40621 41174 41186 41371 41439 41448 41464 41470-41471 41495 41574 41576 41580 41617 41646 41664 41674 41732 41768 41789 41792 41831-41832 41837 41886 41903 42032 42088 42094 42099 42139 42147 42151 42157 42160 42168 42174 42279 42284 42291 42312 42319 42325 42335 42357 42426 42437 42446 42452 42454 42478-42479 42490 42494 42505 42615 42632 42664 42753 42771 42775 42835 43016 43018 43296 43360 44048 44416 44703 45243 46712 47100 47711 47859 48009 48146 48776 48951 49083https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/475/217?format=asciiOpticaldefaultJ/A+A/475/217/pneParameters, pre-classification and posterior classification of planetary nebulaerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNamePlanetary nebula main designation (Common name)meta.id;phys.atmol.configuration;meta.maincharPNGDesignation of the Galactic Planetary Nebulameta.idcharHe/H? Helium over hydrogen abundance ratio by numberphys.abund.Y;arith.ratiofloatnullablen_He/H[:] Note about the He/H abundance ratio (1)meta.notecharr_He/HReference of the He/H abundance ratiometa.ref;phys.abund.Ycharlg(O/H)+12? Oxygen over hydrogen abundance ratio by numberphys.abundfloatnullabler_lg(O/H)+12Reference of the O/H abundance ratiometa.ref;pos.framecharlg(N/H)+12? Nitrogen over hydrogen abundance ratio by numberphys.abundfloatnullabler_lg(N/H)+12Reference of the N/H abundance ratiometa.ref;pos.framecharlg(N/O)? Nitrogen over oxygen abundance ratio by numberphys.abundfloatnullabledhel? Heliocentric distancekpcpos.distance;pos.heliocentricfloatnullabler_dhel? Reference of the heliocentric distancemeta.ref;pos.frameintnullableRGal? Galactocentric distancekpcpos.distance;pos.galactocentricfloatnullableabs(Z)? Absolute value of the height in relation to the Galactic planekpcpos.cartesian.z;pos.galacticfloatnullableVLSR? Radial velocity relative to the Local Sandard of Rest (2)km/sspect.dopplerVeloc;pos.lsrfloatnullableabs(DV)? Absolute value of the peculiar velocitykm/sphys.velocfloatnullableTheta? Angular diameter of the planetary nebulaarcsecphys.angSizefloatnullabler_ThetaReference of the angular diametermeta.ref;pos.framecharS5GHz? 5GHz (6cm) radio flux densitymJyphot.flux.density;em.radio.3-6GHzfloatnullabler_S5GHz? Reference of the 5 GHz flux densitymeta.ref;pos.frameintnullableTypeClassification according to the Peimbert's typessrc.classcharp(typeI)Posterior probability for the membership of each object to the type I groupstat.probabilityfloatp(typeIIa)Posterior probability for the membership of each object to the type IIa groupstat.probabilityfloatp(typeIIb)Posterior probability for the membership of each object to the type IIb groupstat.probabilityfloatp(typeIII)Posterior probability for the membership of each object to the type III groupstat.probabilityfloatp(typeIV)Posterior probability for the membership of each object to the type IV groupstat.probabilityfloatPre-classPrevious classification (as in column "Type" of Table 1)src.classcharPost-classPosterior classificationsrc.classcharSimbadNameSimbad column added by the CDSmeta.idchar_RAComputed Right Ascension for Equinox: J2000degpos.eq.ra;meta.main_DEComputed Declination for Equinox: J2000degpos.eq.dec;meta.mainJ/A+A/475/217/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar