IRAS-based whole-sky upper limit on Dyson Spheres

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A Dyson Sphere is a hypothetical construct of a star purposely cloaked by a thick swarm of broken-up planetary material to better utilize all of the stellar energy. A clean Dyson Sphere identification would give a significant signature for intelligence at work. A search for Dyson Spheres has been carried out using the 250,000 source database of the IRAS infrared satellite which covered 96% of the sky. The search has used the Calgary data collection of the IRAS Low Resolution Spectrometer (LRS) to look for fits to blackbody spectra. Searches have been conducted for both pure (fully cloaked) and partial ... continued below

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32 pages

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Carrigan, Richard A., Jr. September 1, 2008.

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A Dyson Sphere is a hypothetical construct of a star purposely cloaked by a thick swarm of broken-up planetary material to better utilize all of the stellar energy. A clean Dyson Sphere identification would give a significant signature for intelligence at work. A search for Dyson Spheres has been carried out using the 250,000 source database of the IRAS infrared satellite which covered 96% of the sky. The search has used the Calgary data collection of the IRAS Low Resolution Spectrometer (LRS) to look for fits to blackbody spectra. Searches have been conducted for both pure (fully cloaked) and partial Dyson Spheres in the blackbody temperature region 100 {le} T {le} 600 K. Other stellar signatures that resemble a Dyson Sphere are reviewed. When these signatures are used to eliminate sources that mimic Dyson Spheres very few candidates remain and even these are ambiguous. Upper limits are presented for both pure and partial Dyson Spheres. The sensitivity of the LRS was enough to find solar-sized Dyson Spheres out to 300 pc, a reach that encompasses a million solar-type stars.

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32 pages

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  • Report No.: FERMILAB-PUB-08-352-AD
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 941179
  • Archival Resource Key: ark:/67531/metadc902326

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  • September 1, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Sept. 26, 2017, 12:24 p.m.

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Carrigan, Richard A., Jr. IRAS-based whole-sky upper limit on Dyson Spheres, article, September 1, 2008; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc902326/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.