发表机构
School of Integrated Circuits, Shanghai Dianji University; Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University; School of Physics and Astronomy, Beijing Normal University; College of Computer and Information, Dezhou University（上海电机学院集成电路学院; 北京师范大学天文与前沿科学研究院; 北京师范大学物理与天文学院; 德州学院计算机与信息学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
利用FAST的L波段多波束接收器对3I/ATLAS进行周期性射电技术特征搜索，应用典型多adic分解处理多波束动态频谱以找调制信号并区分干扰，未发现可信人工周期性信号，拓展了搜索范围并证明该方法有前景。
AI 中文摘要
3I/ATLAS是太阳系中发现的第三个已确认星际物体，为有针对性的技术特征搜索提供了独特机会。我们报告了使用500米口径球面望远镜（FAST）L波段多波束接收器对3I/ATLAS进行的周期性射电技术特征搜索。为了搜索周期性调制信号并区分多波束射频干扰中以中心波束为主的候选信号，我们将典型多adic分解（CPD）应用于多波束动态频谱。CPD将多波束数据张量分解为一组可分离的分量，具有相关的时间、频率和波束特征。然后通过周期图和自相关诊断选择候选分量。我们发现从3I/ATLAS方向未检测到高于0.146 W的可信人工周期性射电技术特征。此搜索通过包括周期性调制信号扩展了对该目标探索的信号类型范围，并表明CPD是多波束周期性技术特征搜索的一个有前景的框架。
英文摘要
3I/ATLAS, the third confirmed interstellar object discovered in the Solar System, provides a unique opportunity for targeted technosignature searches. We report a periodic radio technosignature search toward 3I/ATLAS using the Five-hundred-meter Aperture Spherical Telescope (FAST) L-band multibeam receiver. To search for periodically modulated signals and distinguish center-beam-dominated candidates from multibeam radio-frequency interference, we apply canonical polyadic decomposition (CPD) to the multibeam dynamic spectra. CPD factorizes the multibeam data tensor into a set of separable components, with associated time, frequency, and beam signatures. Candidate components are then selected through periodogram and autocorrelation diagnostics. We find no credible artificial periodic radio technosignature above 0.146 W is detected from the direction of 3I/ATLAS. This search expands the range of signal types explored for this target by including periodic modulated signal, and illustrates that CPD is a promising framework for multibeam periodic technosignature searches.
Comments10 pages, 3 figures, 3 tables. Published in AJ on August 24, 2026
Journal refThe Astronomical Journal, 172, 172 (2026)
