On the excitation of PG1159-type pulsations

Abstract

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.

Accepted for publication in Astronomy & Astrophysics

References in corpus (2)

• The formation and evolution of hydrogen-deficient post-AGB white dwarfs: the emerging chemical profile and the expectations for the PG1159-DB-DQ evolutionary connection
• Detection of non-radial g-mode pulsations in the newly discovered PG1159 star HE 1429-1209

Cited by in corpus (17)

• Evolutionary and pulsational properties of white dwarf stars
• The Element Abundances in Bare Planetary Nebula Central Stars and the Shell Burning in AGB Stars
• Pulsating white dwarfs: new insights
• Full evolutionary models for PG1159 stars. Implications for the helium-rich O(He) stars
• Asteroseismic inferences on GW Vir variable stars in the frame of new PG 1159 evolutionary models
• New nonadiabatic pulsation computations on full PG1159 evolutionary models: the theoretical GW Vir instability strip revisited
• Asteroseismological measurements on PG 1159-035, the prototype of the GW Vir variable stars
• High-resolution ultraviolet spectroscopy of PG1159-035 with HST and FUSE
• Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS: I. Asteroseismology of the GW Vir stars RX J2117+3412, HS 2324+3944, NGC 6905, NGC 1501, NGC 2371, and K 1-16
• Excitation of g modes in Wolf-Rayet stars by a deep opacity bump
• Evidence of thin helium envelopes in PG1159 stars
• On the possible existence of short-period g-mode instabilities powered by nuclear burning shells in post-AGB H-deficient (PG1159-type) stars
• Kepler and TESS Observations of PG 1159-035
• Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS VI. Asteroseismology of the GW Vir-type central star of the Planetary Nebula NGC 246
• Low-mass, helium-enriched PG1159 stars: a possible evolutionary origin and the implications for their pulsational stability properties
• Astrophysics in 2005
• Asteroseismology of stars on the upper main sequence