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

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

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pasp...92..418s&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 92, Aug.-Sept. 1980, p. 418-421.

Astronomy and Astrophysics

Astronomy

10

Abundance, Interstellar Gas, Planetary Evolution, Planetary Nebulae, Stellar Winds, Carbon, Iron, Red Giant Stars, Refractory Materials

Scientific paper

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.

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