J/ApJ/417/209ivo://CDS.VizieR/J/ApJ/417/209doi:10.26093/cds/vizier.14170209CDSJacoby G.H.Kaler J.B.2017-10-12T13:00:11Z2005-08-16T11:48:49ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsplanetary-nebulaespectroscopychemical-abundancesThe accuracy of spectrophotometry for Magellanic Cloud planetary nebulae is limited by a number of physical effects and operational difficulties: atmospheric dispersion, wavelength-dependent seeing, pointing and guiding errors, and a background of numerous stars and diffuse emission. We describe procedures to minimize the impact of some of these. We then compare our results for both bright and faint objects with published values. There are a few exceptional cases (e.g., LMC 89), but generally we find that bright planetary nebulae in the Clouds have been observed with high accuracy. On the other hand, observations of the faint sample from Jacoby (1980ApJS...42....1J) suffer seriously from many of these effects. We also compare published {lambda}5007 photometry with new CCD photometry for nine faint planetary nebulae. We find the photographic photometry presented by Jacoby (1980ApJS...42....1J) to be accurate to 0.26mag. Fluxes for the fainter objects that are derived from spectrophotometry (Boroson & Liebert, 1989ApJ...339..844B) are found to be less reliable. In comparison, spectrophotometry using the observational techniques presented in this paper provides reliable absolute fluxes. With these improved observations, we review the correlations presented by Kaler & Jacoby (1990ApJ...362..491K, 1991ApJ...382..134K) between abundance ratios and central star mass. The new results fit our earlier correlation for N/O, strengthen that for He/H, and change little about those for C/O and O/H.1993ApJ...417..209Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/417/209CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/121/407 : LMC planetary nebulae positions (Leisy+ 1997)J/A+AS/116/95 : Magellanic Clouds PNe line intensities (Leisy+, 1996)J/A+AS/102/451 : Emission-line stars and PNe in the SMC (Meyssonnier+ 1993)J/AJ/117/238 : LMC extended catalog (Bica+, 1999)J/ApJS/101/41 : SMC and Bridge extended catalog (Bica+ 1995)J/ApJ/365/471 : Planetary nebulae as standard candles. VI. (Jacoby+, 1990)J/ApJS/75/407 : LMC + SMC PNe optical spectroscopy. I (Meatheringham+ 1991)J/ApJS/76/1085 : LMC + SMC PNe optical spectroscopy. II (Meatheringham+ 1991)J/ApJS/83/87 : LMC + SMC PNe optical spectroscopy. III (Vassiliadis+ 1992)J/MNRAS/234/583 : Abundances in Magellanic Cloud planetary nebulae (Monk+ 1988)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/417/209https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/417/209http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/417/209https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/417/209https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/417/209http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/417/209GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/417/209/table2a (General data on nebulae)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/417/209/table2a?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/417/209/table2a?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/417/209/table2a?GETtext/xml+votable180.050000true12.780833-73.9605560.0055555555555555566/33054 33091 33097 33098 33099 33120 33293 33295 33317 37411 37417https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/417/209?format=asciiOpticaldefaultJ/ApJ/417/209/table2aGeneral data on nebulaerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNebula namecharprimarySNameSimbad namecharRAJ2000Right ascension (J2000.0), from Simbadpos.eq.ra;meta.mainDEJ2000Declination (J2000.0), from Simbadpos.eq.dec;meta.maincReddening constant (mag per air mass)magfloatLogF(Hb)H{beta} fluxlog(Jy)floatLogI(Hb)H{beta} intensityfloatRefReferences (1)charLinesDisplay the lines ratios of this PN (from table2)charSimbadSimbad column added by the CDScharJ/ApJ/417/209/table4Chemical compositionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNebula namecharT[OIII]Electron temperature from [OIII] lineKintn_T[OIII][*] Note on T[OIII] (1)charT[NII]Electron temperature from [NII] lineKintn_T[NII][*] Note on T[NII] (1)charNeElectron density, mainly from [SII] linecm**-3intn_Ne[)] Note on Ne (2)charO+O+ (OII) elemental abundancefloatO++O++ (OIII) elemental abundancefloatO/H? Abundance ratio, O/HfloatnullableHe+? He+ (HeII) elemental abundancefloatnullableHe++? He++ (HeIII) elemental abundancefloatnullableHe/H? Abundance ratio, He/HfloatnullableN/O? Abundance ratio, N/OfloatnullableC/O? Abundance ratio, C/OfloatnullableCommComments (3)charJ/ApJ/417/209/table5*Stellar ParametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNebula namecharn_Name[b] b: New ObjectcharTStellar temperatureKintLumStellar luminositysolLumintMassStellar masssolMassfloatJ/ApJ/417/209/table2Corrected line ratiosrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLambdaWavelengthnmfloatIdentIdentification of the lineSMC15? SMC15 corrected line ratio (1)floatnullableSMCJ6? SMCJ6 corrected line ratio (1)floatnullableSMCJ18? SMCJ18 corrected line ratio (1)floatnullableLMC25? LMC25 corrected line ratio (1)floatnullableLMC32? LMC32 corrected line ratio (1)floatnullableLMC54? LMC54 corrected line ratio (1)floatnullableLMC89? LMC89 corrected line ratio (1)floatnullableLMC98? LMC98 corrected line ratio (1)floatnullableLMC100? LMC100 corrected line ratio (1)floatnullableLMCJ20? LMCJ20 corrected line ratio (1)floatnullableLMCJ22? LMCJ22 corrected line ratio (1)floatnullableLMCJ38? LMCJ38 corrected line ratio (1)floatnullable