Super-AGB Stars and their Role as Electron Capture Supernova Progenitors
Super-AGB Stars and their Role as Electron Capture Supernova Progenitors
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DOI：
10.1017/pasa.2017.52
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发表时间：
2017-03
影响因子：
6.3
通讯作者：
C. Doherty;P. Gil-Pons;L. Siess;J. Lattanzio
中科院分区：
文献类型：
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作者：
C. Doherty;P. Gil-Pons;L. Siess;J. Lattanzio
摘要我们回顾了在106 - 12 M <$A范围内的中等质量恒星的生命，死亡和核合成特征，这些恒星在生命的尽头形成了超级AGB星。不同类型的大质量白色矮星（CO，CO-Ne，ONe）之间的临界质量边界，以及白色矮星和超新星之间的临界质量边界，检查随着相对比例的超级AGB恒星的生命结束后，无论是作为一个ONe白色矮星或作为中子星（或ONeFe白色矮星），经历电子捕获超新星事件。另一个潜在的单星通道的电子捕获超新星，失败的大质量恒星的贡献，也进行了讨论。这些不同的最终命运和质量限制，如成分，旋转，对流的效率，核反应速率，质量损失率，和第三疏浚效率的影响因素进行了描述。我们强调的重要性，生产电子捕获超新星的双演化通道。讨论了最近的核合成计算和元素产额结果，提出了一套新的s过程重元素产额。超级AGB星星核合成的贡献进行评估，在银河系的角度来看，和（超级）AGB的情况下被认为是在球状星团中看到的多个恒星种群的背景下。包括粉尘生产的最新工作的简要总结。最后，我们总结了低质量/高质量星星边界的观测限制和潜在的未来研究进展的讨论。
Abstract We review the lives, deaths and nucleosynthetic signatures of intermediate-mass stars in the range ≈6–12 M⊙, which form super-AGB stars near the end of their lives. The critical mass boundaries both between different types of massive white dwarfs (CO, CO–Ne, ONe), and between white dwarfs and supernovae, are examined along with the relative fraction of super-AGB stars that end life either as an ONe white dwarf or as a neutron star (or an ONeFe white dwarf), after undergoing an electron capture supernova event. The contribution of the other potential single-star channel to electron-capture supernovae, that of the failed massive stars, is also discussed. The factors that influence these different final fates and mass limits, such as composition, rotation, the efficiency of convection, the nuclear reaction rates, mass-loss rates, and third dredge-up efficiency, are described. We stress the importance of the binary evolution channels for producing electron-capture supernovae. Recent nucleosynthesis calculations and elemental yield results are discussed and a new set of s-process heavy element yields is presented. The contribution of super-AGB star nucleosynthesis is assessed within a Galactic perspective, and the (super-)AGB scenario is considered in the context of the multiple stellar populations seen in globular clusters. A brief summary of recent works on dust production is included. Last, we conclude with a discussion of the observational constraints and potential future advances for study into these stars on the low mass/high mass star boundary.