论文标题
探路者蜻蜓光谱线映射器：推动超低表面亮度光谱的极限
The pathfinder Dragonfly Spectral Line Mapper: Pushing the limits for ultra-low surface brightness spectroscopy
论文作者
论文摘要
Pathfinder Dragonfly Spectral Line Mapper是一款分布式的孔径望远镜，基于蜻蜓远摄阵列，并带有其他仪器（蜻蜓“滤波器”），以启用UltranArrow Bandpass Imaging。探路者由三个冗余光管组件（OTA）组成，它们被安装在一起以形成单个视野成像望远镜（其中有效的孔径直径随着OTA数量的平方根而增加）。该探路者从2020年3月至2021年10月在天空中配备了窄带过滤器，可提供概念验证成像，表面亮度极限测量，在天空测试和观察软件开发方面。在这里，我们描述了探路望远镜和观察方法以及达到的灵敏度极限。我们概述了当前达到超低表面亮度的限制因素，并介绍了仪器敏感性与低表面亮度线发射的仪器敏感性以及观察到弥漫性气体发射的其他方法的其他方法。最后，我们谈到了即将到来的120-OTA蜻蜓光谱线映射器，该计划目前正在建设中。
The pathfinder Dragonfly Spectral Line Mapper is a distributed aperture telescope based off of the Dragonfly Telephoto Array with additional instrumentation (the Dragonfly "Filter-Tilter") to enable ultranarrow bandpass imaging. The pathfinder is composed of three redundant optical tube assemblies (OTAs) which are mounted together to form a single field of view imaging telescope (where the effective aperture diameter increases as the square-root of the number of OTAs). The pathfinder has been on sky from March 2020 to October 2021 equipped with narrowband filters to provide proof-of-concept imaging, surface brightness limit measurements, on sky testing, and observing software development. Here we describe the pathfinder telescope and the sensitivity limits reached along with observing methods. We outline the current limiting factors for reaching ultra-low surface brightnesses and present a comprehensive comparison of instrument sensitivities to low surface brightness line emission and other methods of observing the ultra-faint line emission from diffuse gas. Finally, we touch on plans for the upcoming 120-OTA Dragonfly Spectral Line Mapper, which is currently under construction.
