Abell 48 – a rare WN-type central star of a planetary nebula

@article{Todt2013Abell4,
  title={Abell 48 – a rare WN-type central star of a planetary nebula},
  author={Helge Todt and Alexei Yu. Kniazev and Vasilii V. Gvaramadze and W. R. Hamann and David A. H. Buckley and Lisa A. Crause and Steven M. Crawford and Amanda A. S. Gulbis and Christian Hettlage and Eric Jon Hooper and T.-O. Husser and Paul Kotze and Nicola S. Loaring and Kenneth Hugh Nordsieck and Donal O’Donoghue and Timothy Edward Pickering and Stephen B. Potter and Encarni Romero-Colmenero and Petri Vaisanen and T. B. Williams and Marsha J. Wolf},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2013},
  volume={430},
  pages={2302-2312}
}
  • H. TodtA. Kniazev M. Wolf
  • Published 9 January 2013
  • Physics
  • Monthly Notices of the Royal Astronomical Society
A considerable fraction of the central stars of planetary nebulae (CSPNe) are hydrogendeficient. Almost all of these H-deficient central stars (CSs) display spectra with strong carbon and helium lines. Most of them exhibit emission-line spectra resembling those of massive WC stars. Therefore these stars are classed as CSPNe of spectral type [WC]. Recently, quantitative spectral analysis of two emission-line CSs, PB 8 and IC 4663, revealed that these stars do not belong to the [WC] class… 

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Herschel-PACS measurements of nitrogen enrichment in nebulae around Wolf-Rayet stars

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