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Weak emission line central stars of planetary nebulae

  • To understand the evolution and morphology of planetary nebulae, a detailed knowledge of their central stars is required. Central stars that exhibit emission lines in their spectra, indicating stellar mass-loss allow to study the evolution of planetary nebulae in action. Emission line central stars constitute about 10 % of all central stars. Half of them are practically hydrogen-free Wolf-Rayet type central stars of the carbon sequence, [WC], that show strong emission lines of carbon and oxygen in their spectra. In this contribution we address the weak emission-lines central stars (wels). These stars are poorly analyzed and their hydrogen content is mostly unknown. We obtained optical spectra, that include the important Balmer lines of hydrogen, for four weak emission line central stars. We present the results of our analysis, provide spectral classification and discuss possible explanations for their formation and evolution.

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Author:Helge Todt, Miriam Peña, Julia Zühlke, Lida Oskinova, Wolf-Rainer HamannORCiDGND, Götz Gräfener
Parent Title (English):Planetary Nebulae: an Eye to the Future
Series (Serial Number):Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (462)
Document Type:Postprint
Date of first Publication:2018/07/24
Year of Completion:2011
Publishing Institution:Universität Potsdam
Release Date:2018/07/24
Tag:stars: AGB and post-AGB; stars: Wolf-Rayet; stars: abundances
Source:Planetary Nebulae: An Eye to the Future, Proceedings IAU Symposium 283 (2011) ; DOI: 10.1017/S1743921312012173
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät
Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften
Peer Review:Referiert
Publication Way:Open Access
Grantor:Cambridge University Press (CUP)
Licence (German):License LogoKeine Nutzungslizenz vergeben - es gilt das deutsche Urheberrecht