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WISE/CatWISE Constraints on Dysonian Waste-heat Technosignatures in Nearby Galaxies

  • Authors: Bo-Lun Huang, Zhen-Zhao Tao, Tong-Jie Zhang

Bo-Lun Huang et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 5.

Which band sets the tightest per object upper limit as a function of radiator temperature T. At T ≲ 200 K, W4 (22 μm) overwhelmingly limits; at T ≳ 300 K, W3 (12 μm) dominates, consistent with Wien’s law and band sensitivities. These statistics explain the shapes of Figure 2 and guide future observing strategy.

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