论文标题
戴森球体
Dyson Spheres
论文作者
论文摘要
我回顾了戴森球体，其目的，工程和检测性的起源和发展。我阐明了人们对它们作为整体物体的流行想象的方式会使它们在重力和辐射压力下动态不稳定，并且机械地对屈曲不稳定。我开发了一个模型，用于旋转恒星和大量材料之间的辐射耦合，并将恒星和dyson球体系统的观察特征连接到球体本身的总辐射特性。我讨论了辐射反馈对中心恒星结构和发光度的影响的问题。最后，我讨论了戴森球体在各种假设下的最佳尺寸，这些假设是它们作为低渗透发射，耗散工作或计算的来源的目的。
I review the origins and development of the idea of Dyson spheres, their purpose, their engineering, and their detectability. I explicate the ways in which the popular imagining of them as monolithic objects would make them dynamically unstable under gravity and radiation pressure, and mechanically unstable to buckling. I develop a model for the radiative coupling between a star and large amounts of material orbiting it, and connect the observational features of a star plus Dyson sphere system to the gross radiative properties of the sphere itself. I discuss the still-unexplored problem of the effects of radiative feedback on the central star's structure and luminosity. Finally, I discuss the optimal sizes of Dyson spheres under various assumptions about their purpose as sources of low-entropy emission, dissipative work, or computation.
