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He, C, N, and O abundances in an ensemble of galactic planetary nebulae

Content Provider	Springer Nature Link
Author	Milava, Yu. V. Kholtygin, A. F.
Copyright Year	2009
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 http://www.astro.spbu.ru/staff/afk/GalChemEvol.html . 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 0.06 dex, while the errors in the C, N, and O abundances are 0.1–0.2 dex. 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 0.1 dex and in the C, N, and O abundances to 0.2–0.3 dex. 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 4–6 Gyr. A similarity between the elemental abundances in PNe of the Magellanic Clouds and the Galactic halo has been established.
Starting Page	518
Ending Page	533
Page Count	16
File Format	PDF
ISSN	10637737
Journal	Astronomy Letters
Volume Number	35
Issue Number	8
e-ISSN	15626873
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2009-08-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Galaxy: evolution, subsystems Magellanic Clouds: evolutionary status planetary nebulae: elemental abundances Astrophysics Astronomy
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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He, C, N, and O Abundances in an Ensemble of Galactic Planetary Nebulae (2008)

He, C, N, and O abundances in an ensemble of galactic planetary nebulae

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He, C, N, and O abundances in an ensemble of galactic planetary nebulae

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