Low-mass , helium-enriched PG 1159 stars : a possible evolutionary origin and the implications for their pulsational stability properties

@inproceedings{Althaus2007LowmassH,
  title={Low-mass , helium-enriched PG 1159 stars : a possible evolutionary origin and the implications for their pulsational stability properties},
  author={Leandro G. Althaus and Alejandro H. C{\'o}rsico and M. M. Miller Bertolami},
  year={2007}
}
Aims. We examine a recently–proposed evolutionary scenario that could explain the existence of the low–mass, helium– enriched PG1159 stars. We focus in particular on the study of the pulsational stability properties of the evolutionary models predicted by such scenario. Methods. We assess the overstability of pulsation g−modes of stellar models as evolution proceeds along the PG1159 domain. Stellar models are extracted from the full evolution of a 1-M⊙ model star that experiences its first… CONTINUE READING