Space VLBI 2020：科学与技术未来会议摘要
Space VLBI 2020: Science and Technology Futures Conference Summary
摘要：
“空间VLBI 2020：科学和技术的未来”会议是“空间高分辨率无线电干涉测量的未来”系列的第二次会议。第一次会议（2018年9月5日至6日;荷兰诺德韦克）重点讨论了天基天线甚长基线干涉测量（VLBI）可能的全方位科学应用。因此，所考虑的观测频率（波长）范围从低于1 MHz（> 300 m）到高于300 GHz（< 1 mm）。第二次会议的重点缩小到飞行任务概念和支持技术，以便能够在30 GHz和更高频率（< 1厘米）进行最高角分辨率观测。这种缩小重点的做法是出于科学和技术方面的考虑。首先，射电天文学飞行任务和事件视界望远镜的结果为研究黑洞（BH）吸积盘和喷流的内部以及检验广义相对论的要素带来了相当大的兴奋。其次，天基VLBI所涉及的技术和要求在100 MHz和100 GHz之间有很大的不同;一个相关的考虑是，现有的一些仪器或飞行任务概念适用于大约100 MHz及以下的频率，而对10 GHz以上频率的空间VLBI的关注已经有一段时间了。本会议摘要试图捕捉发生的演示和讨论的元素。
英文摘要：
The "Space VLBI 2020: Science and Technology Futures" meeting was the second in The Future of High-Resolution Radio Interferometry in Space series. The first meeting (2018 September 5--6; Noordwijk, the Netherlands) focused on the full range of science applications possible for very long baseline interferometry (VLBI) with space-based antennas. Accordingly, the observing frequencies (wavelengths) considered ranged from below 1~MHz (> 300 m) to above 300~GHz (< 1 mm). For this second meeting, the focus was narrowed to mission concepts and the supporting technologies to enable the highest angular resolution observations at frequencies of 30~GHz and higher (< 1 cm). This narrowing of focus was driven by both scientific and technical considerations. First, results from the RadioAstron mission and the Event Horizon Telescope (EHT) have generated considerable excitement for studying the inner portions of black hole (BH) accretion disks and jets and testing elements of the General Theory of Relativity (GR). Second, the technologies and requirements involved in space-based VLBI differ considerably between 100~MHz and 100~GHz; a related consideration is that there are a number of existing instruments or mission concepts for frequencies of approximately 100~MHz and below, while it has been some time since attention has been devoted to space VLBI at frequencies above 10~GHz. This conference summary attempts to capture elements of presentations and discussions that occurred.
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