AI 中文总结
本文介绍用于4米DAG望远镜的PLACID主动日冕仪成像仪的调试进展，其已完成安装与初步验收，将用于系外天体高对比度成像，计划2026年末至2027年初开展首次科学观测。
AI 中文摘要
全球首个自适应恒星光日冕仪——用于4米DAG望远镜的可编程液晶主动日冕仪成像仪（PLACID），采用从H波段到Ks波段工作的空间光调制器，可完全通过软件动态调整焦平面相位掩模。PLACID安装在土耳其4米DAG望远镜的耐氏平台上，位于TROIA XAO系统与DIRAC红外探测器之间，于2025年完成安装，2026年初利用校准光源完成了光学对准及成功的初步验收测试。待TROIA XAO系统投入运行后，将立即开展在轨调试。在轨运行时，它可实现系外行星、褐矮星、原行星盘及双星系统的高对比度成像，能灵活部署焦平面内任意所需相位图案。未来功能包括非共光路像差的自校准、双星的日冕仪零点消光及相干差分成像。本文介绍了初步验收流程、内部对准结果、探测空间估计、新的双星功能及观测工具，旨在为2026年末/2027年初的首次科学观测做好准备。
英文摘要
The world's first adaptive stellar coronagraph, the Programmable Liquid-crystal Active Coronagraphic Imager for the 4-m DAG telescope (PLACID) uses a spatial light modulator operating from H- to Ks-band to dynamically adjust the focal-plane phase mask entirely in software. Positioned between the TROIA XAO system and the DIRAC infrared detector, PLACID was installed on the Nasmyth platform of the Turkish 4-m DAG telescope in 2025, followed by optical alignment and successful preliminary acceptance tests with the calibration light source in early 2026. On-sky commissioning is expected, as soon as the TROIA XAO system will be operational. When on-sky, it will enable high-contrast imaging of exoplanets, brown dwarfs, disks, and binary systems, being able to easily deploy any desired phase pattern in the focal plane. Upcoming features include self-calibration of non-common path aberrations, coronagraphic nulling of binary-stars, and coherent differential imaging. We present the preliminary acceptance procedures and internal alignment results, discovery-space estimates, new binary star features and observation tools, to be ready for first science by late 2026/early 2027.
Comments21 pages, 17 figures, SPIE Astronomical Telescopes + Instrumentation 2026, Paper 14149-20
