发表机构
Korea Astronomy and Space Science Institute; University of Ulsan University of Science and Technology; Kyungpook National University; Space Telescope Science Institute; Korea Institute for Advanced Study; Pusan National University; Korea National University of Education; Seoul National University; Yonsei University（韩国天文学与空间科学研究所; 蔚山科学技术大学; 庆北国立大学; 太空望远镜科学研究所; 韩国高等研究院; 釜山国立大学; 韩国国立教育大学; 首尔国立大学; 延世大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文介绍一款3.5米分块镜机器人空间望远镜的初步架构与科学任务，其采用卡塞格林构型，搭载广角相机等载荷，拟开展多类天体物理研究并向国际科学界开放观测时间。
AI 中文摘要
目前正在研究一款3.5米分块镜机器人空间望远镜，作为天基观测站，用于0.2至1.5微米波长范围内的精密天体物理观测和快速响应暂现源天文学研究。该望远镜采用卡塞格林光学构型，经优化可在宽广平坦的焦平面上实现衍射极限性能，在633纳米处的斯特列尔比大于0.8。拟议的科学有效载荷包括广角相机（WC）、光谱仪和可选的系外行星成像日冕仪。广角相机（WC）提供视场范围从10角分×10角分到30角分×30角分的多波段成像和高帧频时间序列测光。光谱配置及其分辨率仍在研究中，以满足主要科学项目的要求。正在研究可选的系外行星成像日冕仪，用于附近行星系统的高对比度成像，其性能目标包括原始对比度约10^(-8)以及经后处理后的性能提升。目前正在评估候选轨道构型，包括地球轨道和日地L2区域。计划开展的研究包括引力波对应体、快速演化暂现源、Ia型超新星宇宙学、系外行星直接成像和系外行星大气光谱学。尽管以这些核心科学目标为驱动，但该观测站被构想为通用设施，为国际科学界提供开放访问的观测时间。本文介绍了拟议3.5米空间望远镜的初步架构、性能目标和科学任务。
英文摘要
We present the preliminary science concept and mission architecture of a 3.5-meter segmented-mirror robotic space telescope currently under study. The observatory is conceived as a versatile platform supporting wide-field cosmology and galaxy evolution, direct imaging and characterization of nearby planetary systems, time-domain and multi-messenger observations, compact-object studies, and Solar-System small-body science. These programs share requirements for angular resolution, photometric stability, rapid target acquisition, spectroscopy, and long-term observing efficiency. The telescope employs an 18-segment 3.5-meter primary mirror for high-angular-resolution imaging from the near-ultraviolet through the optical and near-infrared. The current baseline covers 0.2--1.5 $μ$m, with the wavelength for diffraction-limited performance to be set by the final wavefront-error budget. Wide-field imaging is intended for deep surveys, precision photometry, and repeated monitoring over approximately 10' $\times$ 10' to 30' $\times$ 30'. Spectroscopic modes with $R \sim 1000$ and higher-resolution options approaching $R \sim 5000$ are being considered for galaxy surveys, transient classification, compact-object spectroscopy, and targeted studies. A dedicated coronagraph is also being studied for direct observations of nearby exoplanetary systems, with a current raw-contrast goal of order $10^{-8}$ and further gains expected from calibration and post-processing. Candidate mission configurations include the Sun--Earth L2 region and alternative Earth orbits, with the final choice driven by science performance, thermal stability, communications, operations, and mission cost. This paper defines the current science requirements, baseline technical configuration, and engineering trade space for further development of the 3.5mST concept.
CommentsSubstantially revised and restructured version, with expanded attribution and citations to prior mission studies, clearer distinction between prior work and the present 3.5mST concept, and revisions to the scientific and technical presentation throughout
