放射性原子核天体物理学
Astrophysics with Radioactive Atomic Nuclei
摘要：
我们建议推进调查电磁辐射起源于原子核超越其目前的婴儿期，一个真正的天文学。这种核辐射与气体的条件无关，因此补充了用于探测附近宇宙的更传统的旋光方法。放射性伽马射线来自大质量恒星内部特定位置的同位素，它们在星际空间中的衰变追踪了ISM的一个不可直接观察的热和稀薄阶段，这对于大质量恒星的反馈至关重要。它的内部时钟可以测量ISM内进程的特征时间。这一领域的研究可以解决的前沿问题是大质量恒星和超新星的复杂内部，它们是银河系动力学和化学演化的关键因素，影响我们太阳系环境的恒星形成和超新星活动的历史，以及对我们银河系年轻恒星托儿所的隐蔽和无法进入的区域的探索。
英文摘要：
We propose to advance investigations of electromagnetic radiation originating in atomic nuclei beyond its current infancy to a true astronomy. This nuclear emission is independent from conditions of gas, thus complements more traditional stronomical methods used to probe the nearby universe. Radioactive gamma-rays arise from isotopes which are made in specific locations inside massive stars, their decay in interstellar space traces an otherwise not directly observable hot and tenuous phase of the ISM, which is crucial for feedback from massive stars. Its intrinsic clocks can measure characteristic times of processes within the ISM. Frontier questions that can be addressed with studies in this field are the complex interiors of massive stars and supernovae which are key agents in galactic dynamics and chemical evolution, the history of star-forming and supernova activity affecting our solar-system environment, and explorations of occulted and inaccessible regions of young stellar nurseries in our Galaxy.
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