Chemical abundances and Wolf-Rayet central stars

@inproceedings{Grny2004ChemicalAA,
  title={Chemical abundances and Wolf-Rayet central stars},
  author={S. K. G{\'o}rny and Roberto Douglas da Costa},
  year={2004}
}
We have observed 44 planetary nebulae (PNe) in the direction of the Galactic bulge, and merged our data with published ones. We have distinguished, in the merged sample of 164 PNe, those PNe most likely to prtain physically to the Galactic bulge and those most likely to belong to the Galactic disk. We have determined the chemical composition of all the 164 objects in a coherent way. We looked for stellar emission features and discovered 14 new (WR) stars and 15 new weak emission line central… CONTINUE READING