微米级技术签名：一立方米月壤如何开始限制银河系中过去技术文明的数量

本文探讨了在月壤中识别微米级工程颗粒物质的可能性，以寻找外星技术文明的遗迹。通过分析星际介质中的颗粒传输及太阳系内的动力学约束，研究得出了银河系内技术文明产出物质的定量上限。若在一立方米月壤中未发现此类物质，将排除太阳型恒星在银河系历史中散布大量长寿命人工碎片的假设。

arXiv:2606.24028v4 Announce Type: replace Abstract: Building on Arkhipov's proposal that technogenic artefacts may survive natural interstellar transport and accumulate on Solar System surfaces, we examine the prospects for identifying micron-scale engineered particulate material within the lunar regolith. We analyse the transport of micron and submicron grains through the interstellar medium, including gas drag, sputtering, and ISM phase-dependent survival, and show that refractory particles with characteristic radii of order 0.3 microns may traverse kiloparsec scales over residence times of 0.1-1 Gyr. Solar radiation pressure and heliospheric filtering define a dynamically constrained slow-arrival channel in which a small fraction of grains reach the Earth-Moon system at relative velocities compatible with survival upon impact. Combining these properties with regolith-mixing constraints yields quantitative upper limits on the cumulative undirected technomaterial output of large-scale spacefaring civilisations: a null detection in a cubic metre of regolith excludes scenarios in which Solar-type stars typically disperse more than approximately 0.10 Earth mass equivalents of long-lived artificial particulate debris over Galactic history. Deliberate targeting of the inner Solar System with artificial particulate matter defines a complementary regime characterised by the visitation frequency and deposited mass of such releases, for which the probabilities of detection may be orders of magnitude