SUPERNOVAE, SUPERNEBULAE, AND NUCLEOSYNTHESIS.
SUPERNOVAE, SUPERNEBULAE, AND NUCLEOSYNTHESIS.
复制标题
超新星、超星云和核合成。
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
D. Swartz
中科院分区：
文献类型：
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作者：
J. Wheeler;R. Harkness;Z. Barkat;D. Swartz
超新星大气计算继续表明，以前计算的碳爆燃模型的变体提供了一个很好的代表性的最大光谱的经典Ia型超新星，包括紫外赤字。然而，对导致简并碳的中心热核失控的条件的仔细考虑表明，失控可以导致爆炸和与观测的直接冲突。正如Ib型超新星的光谱所证明的那样，大质量恒星被认为是氧气的主要来源。对大质量恒星中氧的绝对生成量的估计表明，如果所有质量大于12 Msun;的恒星都以超新星的形式爆炸，那么太阳附近的氧将过量生成，最近12 C（α，γ）16 O反应速率的增加加剧了这种影响。
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 Msun; 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.