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={H. Todt and A. Kniazev and V. Gvaramadze and W. Hamann and D. Buckley and L. Crause and S. Crawford and A. Gulbis and C. Hettlage and E. Hooper and T. Husser and P. Kotze and N. Loaring and K. Nordsieck and D. O’Donoghue and T. Pickering and S. Potter and E. Romero-Colmenero and P. Vaisanen and T. Williams and M. Wolf},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2013},
  volume={430},
  pages={2302-2312}
}
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… Expand
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