论文标题
在紧凑型恒星中因核裂变而燃烧的碳燃烧
Ignition of carbon burning from nuclear fission in compact stars
论文作者
论文摘要
IA型超新星（SN IA）是强大的恒星爆炸，可提供宇宙学中重要的距离指标。最近，我们提出了一种新的SN IA机制，该机制涉及孤立的白矮人（WD）中的核裂变链反应[PRL 126，1311010]。形成为WD的第一个固体开始冻结，是actinide富含的，并且可能支持裂变链反应。在这封信中，我们探索裂变加热的热核点火。我们进行热扩散模拟，并在高密度（以上高于7x10^8 g/cm^3）的高密度下发现，裂变加热可以点燃碳燃烧。这可能会产生SN IA或其他类型的天体瞬变。
Type-Ia supernovae (SN Ia) are powerful stellar explosions that provide important distance indicators in cosmology. Recently, we proposed a new SN Ia mechanism that involves a nuclear fission chain reaction in an isolated white dwarf (WD) [PRL 126, 1311010]. The first solids that form as a WD starts to freeze are actinide rich and potentially support a fission chain reaction. In this letter we explore thermonuclear ignition from fission heating. We perform thermal diffusion simulations and find at high densities, above about 7x10^8 g/cm^3, that the fission heating can ignite carbon burning. This could produce a SN Ia or another kind of astrophysical transient.
