日本黑洞探测器任务开发
Black Hole Explorer Mission Development in Japan
浏览论文内容
中文总结 AI 辅助
本文概述日本在黑洞探测器（BHEX）任务开发中的进展，包括设立BHEX工作组开展A阶段前期研究，推进4.5K制冷机、300GHz SIS混频器等关键仪器技术，升级地面基础设施以支持多频段VLBI观测。
中文摘要 AI 辅助
黑洞探测器（Black Hole Explorer, BHEX）是下一代空间甚长基线干涉测量（Very-Long-Baseline Interferometry, VLBI）任务概念，将现有地基毫米/亚毫米VLBI阵列拓展至空间。日本天文界通过2023年成立的BHEX日本联盟参与BHEX任务开发。本文概述2024年以来日本的进展，包括在日本宇宙航空研究开发机构（JAXA）宇宙科学研究所设立BHEX工作组（BHEX WG），负责日本侧A阶段前期任务研究。我们概述关键仪器技术的近期进展，包括4.5K闭式循环机械制冷机的概念设计研究，以及BHEX用超宽带300GHz超导-绝缘体-超导体（Superconductor-Insulator-Superconductor, SIS）混频器的原型开发。我们还介绍日本地面基础设施的持续升级，以支持用VERA进行86GHz观测，以及用野边山45米望远镜进行86+230GHz同时观测。
英文摘要
The Black Hole Explorer (BHEX) is a next-generation space very-long-baseline interferometry (VLBI) mission concept that will extend existing ground-based millimeter/submillimeter VLBI arrays to space. The Japanese astronomical community has contributed to BHEX mission development through the BHEX Japan Consortium, established in 2023. This paper provides a high-level summary of progress in Japan since 2024, including the establishment of the Black Hole Explorer Working Group (BHEX WG) at the Institute of Space and Astronautical Science (ISAS), JAXA, to conduct the Japanese side of the Pre-Phase~A mission studies. We outline recent advances in key instrument technologies, including concept design studies of a 4.5\,K closed-cycle mechanical cryocooler and prototype development of an ultra-wideband 300\,GHz Superconductor--Insulator--Superconductor (SIS) mixer for BHEX. We also describe ongoing upgrades to Japan's ground infrastructure to support 86\,GHz observations with VERA and simultaneous 86+230\,GHz observations with the Nobeyama 45\,m Telescope.
