Stability properties are presented of dipole and quadrupole nonradial oscillation modes of model stars that experienced a late helium shell flash on their way to the white-dwarf cooling domain. The computed instability domains are compared with the observed hot variable central stars of planetary nebulae and the GW Vir pulsators.
@article{arxiv.astro-ph/0504495,
title = {On the excitation of PG1159-type pulsations},
author = {A. Gautschy and L. G. Althaus and H. Saio},
journal= {arXiv preprint arXiv:astro-ph/0504495},
year = {2009}
}
Comments
Accepted for publication in Astronomy & Astrophysics