Presupernova models and supernovae
Presupernova models and supernovae
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前超新星模型和超新星
DOI：
10.1007/bf00212318
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发表时间：
1980
影响因子：
10.3
通讯作者：
K. Nomoto
中科院分区：
文献类型：
--
作者：
D. Sugimoto;K. Nomoto
本文从恒星结构和演化理论的角度，对超新星爆发前演化理论的现状和超新星爆发的触发机制进行了综述和讨论。它并不打算收集迄今为止获得的数值结果的每一个细节，而是从数值恒星模型的复杂性中提取物理上清晰的理解。为此目的，恒星核心的演化是在一个广义的方式进行了讨论。下面讨论超新星爆炸的类型。中等质量星星的碳爆燃超新星导致星星的完全破裂。大质量的星星演化成超新星是由铁原子核的光解离引发的，这导致中子星星或黑洞的形成，这取决于它的质量。这两个是典型的超新星类型。在它们之间，仍然存在一个质量范围，在这个范围内，恒星核心的坍缩是由电子捕获触发的，最近的研究表明，尽管氧气爆燃与电子捕获竞争，但中子星星仍然会离开。还讨论了发生在吸积白色矮星中的氦或碳的燃烧和爆炸，以及在超大质量恒星中由电子对产生引发的坍缩。
Present status of the theories for presupernova evolution and triggering mechanisms of supernova explosions are summarized and discussed from the standpoint of the theory of stellar structure and evolution. It is not intended to collect every detail of numerical results thus far obtained, but to extract physically clear-cut understanding from complexities of the numerical stellar models. For this purpose the evolution of stellar cores is discussed in a generalized fashion. The following types of the supernova explosions are discussed. The carbon deflagration supernova of intermediate mass star which results in the total disruption of the star. Massive star evolves into a supernova triggered by photo-dissociation of iron nuclei which results in a formation of a neutron star or a black hole depending on its mass. These two are typical types of the sueprnovae. Between them there remains a range of mass for which collapse of the stellar core is triggered by electron captures, which has been recently shown to leave a neutron star despite oxygen deflagration competing with the electron captures. Also discussed are combustion and detonation of helium or carbon which take place in accreting white dwarfs, and the collapse which is triggered by electron-pair creation in very massive stars.