Physics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phdt.........8b&link_type=abstract
Ph.D. Thesis Tuebingen Univ. (Germany, F.R.). Fakultaet für Physik.
Physics
Halos, Photoionization, Planetary Nebulae, Stellar Evolution, Stellar Models, Absorption Spectra, Expansion, Expulsion, Radiative Transfer, Recombination Reactions
Scientific paper
Nebula formation models were verified, emphasizing the halo around nebulae. The evolution of the central star is described. Two nebulae formation processes (two-wind model, model with fast nebula expulsion) are presented. The calculations required for the physical processes, as well as the model calculations are explained. The application domain of the two-wind model is rather limited, while the fast-expulsion model shows rough agreement with observed nebula and halo quantities. The latter model is considered as better, although single parameter changes strongly alter the calculations.
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