Other
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phdt........28g&link_type=abstract
Thesis (PH.D.)--MCMASTER UNIVERSITY (CANADA), 1985.Source: Dissertation Abstracts International, Volume: 46-12, Section: B, page
Other
2
Scientific paper
Despite great theoretical progress the nature of the progenitors of Type I supernovae is still in doubt. In recent years much attention has been focussed on accreting white dwarf models. This thesis examines another class of possible progenitors: extended helium stars. The computer code BOMB was written to hydrodynamically evolve the models. A total of seventeen models are examined. Five of them resemble R Cor Bor stars which are hydrogen-deficient pulsational variables of roughly 1.5 - 2.0 M(,o) named after the archetype R Corona Borealis. Ten other models are variations on these, used to explore the param- eter space of possible models. The remaining two models are of the bare white dwarf type which constitute the current orthodoxy in the field. It is found that the R Cor Bor stars are not viable as Type I super- nova progenitors. The bare white dwarf models fit the available data better then do any of the envelope models, although stars with rela- tively small, low-mass envelopes could also provide reasonable fits.
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