J/ApJ/831/L3ivo://CDS.VizieR/J/ApJ/831/L3doi:10.26093/cds/vizier.18319003CDSMashburn A.L.Sterling N.C.Madonna S.Dinerstein H.L.Roederer I.U.,Geballe T.R.2017-11-10T11:15:39Z2017-03-14T07:24:10ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsplanetary-nebulaechemical-abundancesinfrared-astronomyspectroscopyWe present near-infrared spectra of 10 planetary nebulae (PNe) in the Large and Small Magellanic Clouds (LMC and SMC), acquired with the FIRE and GNIRS spectrometers on the 6.5 m Baade and 8.1 m Gemini South Telescopes, respectively. We detect Se and/or Kr emission lines in eight of these objects, the first detections of n-capture elements in Magellanic Cloud PNe. Our abundance analysis shows large s-process enrichments of Kr (0.6-1.3 dex) in the six PNe in which it was detected, and Se is enriched by 0.5-0.9 dex in five objects. We also estimate upper limits to Rb and Cd abundances in these objects. Our abundance results for the LMC are consistent with the hypothesis that PNe with 2-3 M_{\sun}_ progenitors dominate the bright end of the PN luminosity function in young gas-rich galaxies. We find no significant correlations between s-process enrichments and other elemental abundances, central star temperature, or progenitor mass, though this is likely due to our small sample size. We determine S abundances from our spectra and find that [S/H] agrees with [Ar/H] to within 0.2 dex for most objects, but is lower than [O/H] by 0.2-0.4 dex in some PNe, possibly due to O enrichment via third dredge-up. Our results demonstrate that n-capture elements can be detected in PNe belonging to nearby galaxies with ground-based telescopes, allowing s-process enrichments to be studied in PN populations with well-determined distances.2016ApJ...831L...3Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/831/L3CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/218/25 : Abundances in PNe. III: Se and Kr (Sterling+, 2015)J/A+A/560/A44 : Abundances of LMC bar & disk stars (Van der Swaelmen+, 2013)J/ApJ/761/33 : Chemical properties of 89 stars in LMC disk (Lapenna+, 2012)J/ApJ/746/29 : High-resolution GC abundances. IV. 8 LMC GCs (Colucci+, 2012)J/A+A/480/379 : Abundances of 59 red giants in LMC (Pompeia+, 2008)J/ApJ/659/1265 : Emission lines in 4 planetary nebulae (Sharpee+, 2007)J/A+A/456/451 : Magellanic Clouds PNe abundances (Leisy+, 2006)J/ApJ/622/294 : STIS UV spectra of LMC PNe (Stanghellini+, 2005)J/A+AS/116/95 : Magellanic Clouds PNe line intensities (Leisy+, 1996)J/ApJ/417/209 : Faint planetary nebulae in Magellanic Clouds (Jacoby+, 1993)J/ApJS/76/1085 : LMC + SMC PNe optical spectroscopy. II (Meatheringham+ 1991)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/831/L3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/831/L3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/831/L3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/831/L3https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/831/L3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/831/L3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/831/L3/table1 (Observing log and nebular properties of the 10 planetary nebulae (PNe))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/831/L3/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/831/L3/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/831/L3/table1?GETtext/xml+votable180.050000true71.9124211-72.47240390.0055555555555555566/33052 33061 33096 33097 33098 33110 33293 33319 33336 37419https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/831/L3?format=asciiInfrareddefaultJ/ApJ/831/L3/table1Observing log and nebular properties of the 10 planetary nebulae (PNe)GalGalaxy namemeta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSMPPN name (<SMP {S/L}MC NN> in Simbad)meta.id;meta.mainintprimaryNlNumber of line identifications for this PNmeta.numberintnullableDateObserved datetime.epochnullableInstInstrument (FIRE or GNRIS, see the "Description" section above)meta.id;instrcharTint[1120/8000] Integration timestime.epochintTeO3[11.7/16]? T_e_[OIII] nebular temperature1000Kphys.temperaturefloatnullablene[2.2/31.4]? Electron density1000cm**-3phys.densityfloatnullableCHb[0/0.5]? H{beta} extinction coefficientobs.atmos.extinctionfloatnullablem5007[14.6/16.2]? Apparent [OIII] 5007 magnitude (1)phot.mag;em.line.OIIIfloatnullablelogC/O[-0.9/0.7]? C/O abundancephys.abundfloatnullabler_logC/OReference for C/O abundance (2)meta.ref;pos.framecharlogN/O? N/O abundancephys.abundfloatnullabler_logN/OReference for N/O abundance (2)meta.ref;pos.framecharTeff[38.8/150]? Central star temperature1000Kphys.temperaturefloatnullabler_TeffTeff reference (2)meta.ref;pos.framecharMinitEstimated progenitor mass M_init_ (3)solMassphys.masscharSimbadSimbad column added by the CDSmeta.ref.urlchar_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/ApJ/831/L3/table2Line identifications and intensitiesCommComment (3)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalGalaxy name (SMC or LMC)meta.id.parentcharSMPPlanetary Nebular Name (<SMP {S/L}MC NN> in Simbad)meta.id;meta.mainintInstSpectrometer used (1)meta.id;instrcharLineLine Identification, ionmeta.id;spect.linecharlamobs[0.831/2.462]? Observed wavelength, micronsumem.wldoublenullablelamlab[0.830/2.455] Laboratory wavelength, micronsumem.wldoublel_F/F(Brg)[<= ] Limit flag on F/F(Brg)meta.code.errorcharF/F(Brg)[0.07/1410]? Measured Line Flux, normalized (2)phot.flux;arith.ratiodoublenullablee_F/F(Brg)[0.01/54]? Uncertainty in F/F(Brg)stat.errordoublenullablel_I/I(Brg)[<= ] Limit flag on I/I(Brg)meta.code.errorcharI/I(Brg)[0.08/1570]? Measured Line Intensity, normalized (2)spect.line.intensity;arith.ratiodoublenullablee_I/I(Brg)[0.01/62]? Uncertainty in I/I(Brg)stat.errordoublenullable