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J/PAZh/35/574   He, C, N and O abundances in planetary nebulae (Milanova+, 2009)

He, C, N, and O abundances in an ensemble of Galactic planetary nebulae. Milanova Yu.V., Kholtygin A.F. <Pis'ma Astron. Zh. 35, 574 (2009)> =2009PAZh...35..574M =2009AstL..35...518M
ADC_Keywords: Planetary nebulae ; Abundances Keywords: Galaxy: evolution, subsystems - Magellanic Clouds - evolutionary status - planetary nebulae: elemental abundances Abstract: The He, C, N, and O abundances in more than 120 planetary nebulae (PNe) of our Galaxy and the Magellanic Clouds have been redetermined by analyzing new PNe observations. The characteristics of PNe obtained by modeling their spectra have been used to compile a new catalog of parameters for Galactic and extragalactic PNe, which is accessible at The errors in the parameters of PNe and their elemental abundances related to inaccuracies in the observational data have been analyzed. The He abundance is determined with an accuracy of 0.06dex, while the errors in the C, N, and O abundances are 0.1-0.2dex. Taking into account the inaccuracies in the corrections for the ionization stages of the elements whose lines are absent in the PNe spectra increases the errors in the He abundance to 0.1dex and in the C, N, and O abundances to 0.2-0.3dex. The elemental abundances in PNe of various Galactic subsystems and the Magellanic Clouds have been analyzed. This analysis suggests that the Galactic bulge objects are similar to type II PNe in Peimbert's classification, whose progenitor stars belong to the thin-disk population with ages of at least 4-6Gyr. A similarity between the elemental abundances in PNe of the Magellanic Clouds and the Galactic halo has been established. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 58 94 He, C, N, and O abundances in Galactic planetary nebulae table6.dat 58 21 He, C, N, and O abundances in PNe of the Magellanic Clouds
See also: V/84 : Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker+, 1992 V/127 : MASH Catalogues of Planetary Nebulae (Parker+ 2006-2008) Byte-by-byte Description of file: table[36].dat
Bytes Format Units Label Explanations
1- 9 A9 --- Name Planetary nebula name 11- 12 I2 --- Ex Excitation class 14- 18 I5 K T0 Electron temperature 20- 24 F5.3 --- t2 Parameter, t2, described amplitude of fluctuation temperature 26- 34 F9.2 cm-3 ne Electron density 36- 40 F5.2 [---] [He] He abundance, log(N(He)/N(H))+12 42- 46 F5.2 [---] [C] ? C abundance, log(N(C)/N(H))+12 48- 52 F5.2 [---] [N] ? N abundance, log(N(N)/N(H))+12 54- 58 F5.2 [---] [O] O abundance, log(N(O)/N(H))+12
Table 5: Global parameters of PNe in our Galaxy and the Magellanic Clouds -------------------------------------------------------------------------------- Element [X]=log(X/H) + 12 Type <z> <M> <[He]> <[C]> <[N]> <[O]> kpc solMass -------------------------------------------------------------------------------- I 0.23±0.25 0.686±0.081 11.21±0.1 8.32±1.35 8.96±0.66 8.63±0.69 IIa 0.31±0.29 0.638±0.046 11.13±0.09 8.82±0.44 8.73±0.69 8.75±0.33 IIb 0.56±0.36 0.617±0.033 11.03±0.1 8.55±0.4 8.36±0.57 8.53±0.38 III 1.05±1.12 0.599±0.026 10.94±0.27 8.60±0.01 7.92±0.50 8.41±0.30 IV 1.35±0.0 0.588±0.0 11.06±0.06 8.64±0.84 7.98±0.5 8.22±0.36 Bulge 0.56±0.29 0.614±0.03 11.16±0.1 8.74±0.44 8.59±0.59 8.86±0.42 LMC -- -- -- -- 11.02±0.11 8.8 ±0.58 7.49±0.86 8.24±0.55 SMC -- -- -- -- 11.10±0.08 8.98±0.83 8.08±1.03 8.30±0.21
(End) Yury Pakhomov, Veta Avedisova [INASAN] 29-Dec-2009
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