| Issue |
A&A
Volume 438, Number 3, August II 2005
|
|
|---|---|---|
| Page(s) | 1013 - 1020 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20042486 | |
| Published online | 18 July 2005 | |
On the excitation of PG 1159-type pulsations
1
Wetterchrüzstr. 8c, 4410 Liestal, Switzerland e-mail: alfred@gautschy.ch
2
Departament de Física Aplicada, Universitat Politècnica de Catalunya, Av. del Canal Olímpic, s/n, , Castelldefels, Barcelona, Spain
3
Astronomical Institute, School of Sciences, Tohoku University, Sendai , Japan
Received:
6
December
2004
Accepted:
17
April
2005
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.
Key words: stars: evolution / stars: white dwarfs / stars: oscillations
© ESO, 2005
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