Hydrogen shell game - pulsational instabilities in hydrogen shell-burning planetary nebula nuclei

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166832· OSTI ID:6534537

Kawaler, S D

Fully nonadiabatic g-mode pulsation calculations have been obtained for evolutionary models of planetary nebula nuclei (PNN) with active hydrogen-burning shells. Expressions have been developed for the phase delays which can develop between the temperature variations and the abundance variations of agents in the CN cycle. G-mode instabilities are noted that are driven by the epsilon mechanism at the position of the nuclear burning shells in standard PNN models. The results indicate that the central stars do not retain sufficient hydrogen to support nuclear burning following ejection of the planetary nebula. 27 references.

• Research Organization: Yale Univ., New Haven, CT (USA)
• OSTI ID: 6534537
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 334; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ADIABATIC PROCESSES
CHEMICAL COMPOSITION
CNO CYCLE
ELEMENTS
GRAVITY WAVES
HYDROGEN
HYDROGEN BURNING
ISOTOPES
MATHEMATICAL MODELS
NEBULAE
NITROGEN ISOTOPES
NONMETALS
OXYGEN ISOTOPES
PLANETARY NEBULAE
PULSATIONS
STAR BURNING
STAR EVOLUTION
STAR MODELS
VARIATIONS