SLYSH晕：冷计算的废热作为亚毫米波段的技术信号
Slysh haloes: the waste heat of cold computing as a submillimetre technosignature
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中文总结 AI 辅助
该研究提出冷计算废热可作为亚毫米波段技术信号，命名为SLYSH晕，论证其合理性与观测可行性，给出搜索方案及判别指标。
中文摘要 AI 辅助
对戴森废热的搜索几乎完全集中在中红外波段，因此主要对温度为100-600K的辐射技术敏感。我们认为，以计算为主的成熟文明可能会在低得多的温度下耗散大量能量。不可逆计算的兰道尔成本与温度线性相关，而大恒星周围区域的环境温度接近2.7K的宇宙微波背景下限。因此，冷计算在热力学上具有吸引力，且由于所需辐射面积与T⁻⁴成正比，可能会很显眼。这些考虑预测了一类新的天体，我们以冷戴森搜索的首位倡导者将其命名为SLYSH HALO（SLYSH晕）。SLYSH晕是一种基于物理的部分戴森群，产生自行星系统寒冷外层的灰色、无谱线热辐射。我们表明，这种结构在能量和物质上是合理的，且M型矮星是特别有利的搜索目标。对附近恒星的存档远红外和亚毫米巡天（DEBRIS、DUNES和SONS）原则上可被重新解读，以约束约10²⁰瓦的冷恒星周围耗散，比之前红外观测搜索的废热光度低几个数量级。Planck和JCMT的存档观测，以及ALMA和NOEMA等设施的干涉数据重处理，提供了额外的机会。我们整理了六个观测判别指标，将工程辐射源与天然冷源区分开，并概述了一个三级搜索计划。即使是零结果，也将首次对戴森技术信号进行温度完整的评估。
英文摘要
Searches for Dysonian waste heat have operated almost exclusively in the mid-infrared and are therefore sensitive primarily to technology radiating at 100-600K. We argue that mature, computation-dominated civilisations may instead dissipate much of their energy at far lower temperatures. The Landauer cost of irreversible computation scales linearly with temperature, while ambient temperatures at large circumstellar radii approach the 2.7K cosmic microwave background floor. Cold computation is therefore thermodynamically attractive and, because the required radiating area scales as T**-4, potentially conspicuous. These considerations predict a new object class, which we term the SLYSH HALO after the first advocate of cold Dysonian searches. A Slysh halo is a physically motivated partial Dyson swarm producing grey, line-free thermal emission from the cold outer regions of planetary systems. We show that such structures are energetically and materially plausible, and that M dwarfs provide especially favourable search targets. Archival far-infrared and submillimetre surveys of nearby stars (DEBRIS, DUNES and SONS) can in principle be reinterpreted to constrain cold circumstellar dissipation at approximately the 10**20 Watt level, several orders of magnitude below the waste-heat luminosities targeted by previous infrared searches. Additional opportunities are provided by archival observations from Planck and the JCMT, together with the reprocessing of interferometric data from facilities such as ALMA and NOEMA. We assemble six observational discriminants that separate engineered radiators from natural cold sources and outline a three-tier search programme. Even a null result would provide the first temperature-complete assessment of Dysonian technosignatures.
发表机构
- The University of Manchester（曼彻斯特大学）
- Leiden University（莱顿大学）
- University of Malta（马耳他大学）
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