{"title":"Dyson球","authors":"J. Wright","doi":"10.2298/SAJ2000001W","DOIUrl":null,"url":null,"abstract":"I review the origins and development of the idea of Dyson spheres, their\n purpose, their engineering, and their detectability. I explicate the ways in\n which the popular imagining of them as monolithic objects would make them\n dynamically unstable under gravity and radiation pressure, and mechanically\n unstable to buckling. I develop a model for the radiative coupling between a\n star and large amounts of material orbiting it, and connect the\n observational features of a star plus Dyson sphere system to the gross\n radiative properties of the sphere itself. I discuss the still-unexplored\n problem of the effects of radiative feedback on the central star's structure\n and luminosity. Finally, I discuss the optimal sizes of Dyson spheres under\n various assumptions about their purpose as sources of low-entropy emission,\n dissipative work, or computation.","PeriodicalId":48878,"journal":{"name":"Serbian Astronomical Journal","volume":" ","pages":""},"PeriodicalIF":0.8000,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":"{\"title\":\"Dyson spheres\",\"authors\":\"J. Wright\",\"doi\":\"10.2298/SAJ2000001W\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"I review the origins and development of the idea of Dyson spheres, their\\n purpose, their engineering, and their detectability. I explicate the ways in\\n which the popular imagining of them as monolithic objects would make them\\n dynamically unstable under gravity and radiation pressure, and mechanically\\n unstable to buckling. I develop a model for the radiative coupling between a\\n star and large amounts of material orbiting it, and connect the\\n observational features of a star plus Dyson sphere system to the gross\\n radiative properties of the sphere itself. I discuss the still-unexplored\\n problem of the effects of radiative feedback on the central star's structure\\n and luminosity. Finally, I discuss the optimal sizes of Dyson spheres under\\n various assumptions about their purpose as sources of low-entropy emission,\\n dissipative work, or computation.\",\"PeriodicalId\":48878,\"journal\":{\"name\":\"Serbian Astronomical Journal\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":0.8000,\"publicationDate\":\"2020-06-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Serbian Astronomical Journal\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.2298/SAJ2000001W\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ASTRONOMY & ASTROPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Serbian Astronomical Journal","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.2298/SAJ2000001W","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
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.
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.
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