论文标题
中子捕获过程慢：低质量AGB恒星和前硅碳化物颗粒
Slow Neutron-Capture Process: Low-mass AGB stars and presolar silicon carbide grains
论文作者
论文摘要
前晶粒是在恒星风中形成的微观粉尘颗粒或在太阳系形成之前死亡的古恒星的爆炸。大多数（〜90％）的前碳化硅（SIC）晶粒，包括主流（MS），Y和Z的类型，来自低质量C的低质量渐近巨型分支（AGB）恒星，这是由无处不在的sic尘埃在AGB恒星中观察到的sic sic duck septer and versevers slow showers nedron crend cress nedron-cyperron cysatron conferron cy nedron cy nedron cy nedron conferron cy n s siperron cy n s siperron的支持。在这里，我们回顾了前AGB SIC晶粒的同位素研究的状态，重点是重元素同位素，并强调了前谷物研究对核天体物理学的重要性。我们讨论了不同类型的核对改变AGB恒星参数的敏感性，以及它们在Presolar AGB SIC晶粒中的丰度可用于在恒星参数上提供独立的，详细的约束，包括13C形成，恒星温度，恒星温度和核反应速率。
Presolar grains are microscopic dust grains that formed in the stellar winds or explosions of ancient stars that died before the formation of the solar system. The majority (~90% in number) of presolar silicon carbide (SiC) grains, including types mainstream (MS), Y, and Z, came from low-mass C-rich asymptotic giant branch (AGB) stars, which is supported by the ubiquitous presence of SiC dust observed in the circumstellar envelope of AGB stars and the signatures of slow neutron-capture process preserved in these grains. Here, we review the status of isotope studies of presolar AGB SiC grains with an emphasis on heavy-element isotopes and highlight the importance of presolar grain studies for nuclear astrophysics. We discuss the sensitives of different types of nuclei to varying AGB stellar parameters and how their abundances in presolar AGB SiC grains can be used to provide independent, detailed constraints on stellar parameters, including 13C formation, stellar temperature, and nuclear reaction rates.
