Supernovae, supernebulae, and nucleosynthesis

Details Supernovae, supernebulae, and nucleosynthesis Supernovae, supernebulae, and nucleosynthesis

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98.1018w&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Oct. 1986, p. 1018-1024. Research supported by the

Astronomy and Astrophysics

Astronomy

25

Abundance, Nebulae, Nuclear Fusion, Stellar Spectra, Supernovae, Oxygen Spectra, Stellar Composition

Scientific paper

Supernova atmosphere calculations continue to show that variants of previously calculated carbon-deflagration models provide a good representation of the maximum light spectra of classical type Ia supernovae including the ultraviolet deficit. Careful consideration of the conditions leading to central thermonuclear runaway of degenerate carbon shows that runaway can, however, lead to detonation and direct conflict with observations. As witnessed by the spectra of type Ib supernovae, massive stars are expected to be the primary source of oxygen. Estimates of the absolute production of oxygen in massive stars suggest that if all stars more massive than ≡12 M_sun; explode as supernovae, oxygen would be overproduced in the solar neighborhood, an effect exacerbated by the recent increase in the reaction rate for 12C(α, γ)16O.

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