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.
Author details: | Helge Tobias TodtORCiD, Miriam Peña, Julia Zühlke, Lidia M. OskinovaORCiDGND, Wolf-Rainer HamannORCiDGND, Götz Gräfener |
---|---|
URN: | urn:nbn:de:kobv:517-opus4-413775 |
Title of parent work (English): | Planetary Nebulae: an Eye to the Future |
Publication series (Volume number): | Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (462) |
Publication type: | Postprint |
Language: | English |
Date of first publication: | 2018/07/24 |
Publication year: | 2011 |
Publishing institution: | Universität Potsdam |
Release date: | 2018/07/24 |
Tag: | stars: AGB and post-AGB; stars: Wolf-Rayet; stars: abundances |
Number of pages: | 2 |
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 | |
DDC classification: | 5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften |
Peer review: | Referiert |
Publishing method: | Open Access |
Grantor: | Cambridge University Press (CUP) |
License (German): | Keine öffentliche Lizenz: Unter Urheberrechtsschutz |