Dyson球

IF 0.8 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Serbian Astronomical Journal Pub Date : 2020-06-30 DOI:10.2298/SAJ2000001W

J. Wright

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引用次数: 12

摘要

我回顾了戴森球体的起源和发展，它们的用途，它们的工程，以及它们的可探测性。我解释了流行的将它们想象成整体物体的方式，这些方式会使它们在重力和辐射压力下动态不稳定，而在屈曲时机械不稳定。我开发了一个恒星和围绕它运行的大量物质之间的辐射耦合模型，并将恒星加戴森球体系统的观测特征与球体本身的总辐射特性联系起来。我讨论了辐射反馈对中心恒星结构和光度的影响这一尚未探索的问题。最后，我讨论了戴森球体在各种假设下的最佳尺寸，这些假设是关于它们作为低熵发射、耗散功或计算源的目的。

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Dyson spheres

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.

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来源期刊

Serbian Astronomical Journal ASTRONOMY & ASTROPHYSICS-

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： Serbian Astronomical Journal publishes original observations and researches in all branches of astronomy. The journal publishes: Invited Reviews - review article on some up-to-date topic in astronomy, astrophysics and related fields (written upon invitation only), Original Scientific Papers - article in which are presented previously unpublished author''s own scientific results, Preliminary Reports - original scientific paper, but shorter in length and of preliminary nature, Professional Papers - articles offering experience useful for the improvement of professional practice i.e. article describing methods and techniques, software, presenting observational data, etc. In some cases the journal may publish other contributions, such as In Memoriam notes, Obituaries, Book Reviews, as well as Editorials, Addenda, Errata, Corrigenda, Retraction notes, etc.