Gas-phase abundances of refractory elements in planetary nebulae - A hot-wind model

Journal Article · · Publ. Astron. Soc. Pac.; (United States)

DOI:https://doi.org/10.1086/130688· OSTI ID:5634062

Shields, G A

Planetary nebulae (PN) characteristically show large gas-phase depletions of some refractory elements, with Fe/H and Ca/H concentration ratios approximately equal to -1.5. In contrast, the gas-phase abundance of carbon is large, with a C/H concentration ratio greater than approximately +0.3. This pattern is difficult to understand in terms of grain formation and destruction during PN formation. However, these abundances are consistent with a model (Kwok, Purton, and FitzGerald, 1978) in which the PN shell consists of material expelled as a wind during the red-giant phase and subsequently compressed and accelerated by the impact of a hot stellar wind from the central star.

• OSTI ID: 5634062
• Journal Information: Publ. Astron. Soc. Pac.; (United States), Journal Name: Publ. Astron. Soc. Pac.; (United States) Vol. 92; ISSN PASPA
• 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
ABUNDANCE
CARBON
ELEMENTS
GIANT STARS
INTERSTELLAR SPACE
IRON
METALS
NEBULAE
NONMETALS
PHASE TRANSFORMATIONS
PLANETARY EVOLUTION
PLANETARY NEBULAE
RED GIANT STARS
REFRACTORIES
SOLAR SYSTEM EVOLUTION
SPACE
STARS
STELLAR WINDS
TRANSITION ELEMENTS