Affiliation:
1. Department of Astronomy & Astrophysics and Center for Exoplanets and Habitable Worlds and Penn State Extraterrestrial Intelligence Center Davey Laboratory, The Pennsylvania State University, University Park, USA
Abstract
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.
Publisher
National Library of Serbia
Subject
Astronomy and Astrophysics
Cited by
27 articles.
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