Liger: Next Generation Imager and Spectrograph for Keck Observatory Adaptive Optics
Liger: Next Generation Imager and Spectrograph for Keck Observatory Adaptive Optics
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Liger：凯克天文台自适应光学的下一代成像仪和光谱仪
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
A. Zonca
中科院分区：
文献类型：
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作者：
S. Wright;J. Larkin;T. Jones;R. Kupke;M. Fitzgerald;M. Kassis;Maren Cosens;E. Chisholm;T. Do;C. Fassnacht;D. Fisher;A. Ghez;Chris Johnson;J. Keane;E. Kirby;E. Kress;Q. Konopacky;Jessica R. Lu;J. Maire;J. O’Meara;N. Reddy;R. Sanders;K. Sandstrom;A. Shapley;J. Sohn;A. Surya;T. Treu;R. Weber;James Wiley;P. Wizinowich;M. Wong;A. Zonca
我们正在为W。M.凯克天文台。这款被称为Liger的创新仪器对于探索整个宇宙时间的广泛科学案例至关重要，例如暗物质子结构、遥远的星系、超大质量黑洞、附近的星星形成区域、银河系中心和太阳系天体。Liger被设计成一种设施级仪器，通过提供更高的光谱分辨率（R = 8000-10000），更短的波长（0.84 - 2.4 μm）和更大的视场等增强功能，与任何当前和未来的地面和空间IFS系统相比，将使新的科学成为可能。Liger仪器使用最新的近红外探测器作为成像相机，该相机与创新的IFS同时工作，IFS使用切片器和小透镜阵列进行空间采样。Liger正在计划用于Keck I望远镜，以利用即将推出的Keck全精度自适应光学（KAPA）系统，该系统将提供显着改进的自适应光学（AO）性能。Liger的设计建立在合作伙伴项目的遗留工作基础上，以最大限度地降低成本和制造及施工时间表。我们正在大量利用我们在30米望远镜的第一台轻型仪器IRIS上的经验和设计工作，为凯克AO系统建造Liger仪器。我们目前正在完成该仪器的关键设计阶段，预计将于2021年开始建造，并计划于2026年完工和交付。作为超大型望远镜后期仪器的先驱，Liger是未来十年技术和科学上的关键垫脚石。
We are designing a next-generation adaptive optics-fed integral field spectrograph (IFS) and imaging camera for the W. M. Keck Observatory. This innovative instrument, known as Liger, will be crucial for exploring a wide range of science cases across cosmic time, such as dark matter substructure, distant galaxies, supermassive black holes, nearby star forming regions, the Galactic Center, and Solar System bodies. Liger is designed to be a facility-class instrument that will enable new science by offering enhanced capabilities such as higher spectral resolving power (R∼8000-10000), access to shorter wavelengths (0.84 2.4 μm), and larger fields of view compared to any current and future groundand space-based IFS systems. The Liger instrument uses the latest near-infrared detectors for an imaging camera that operates simultaneously with an innovative IFS that uses both a slicer and lenslet array for spatial sampling. Liger is being planned for the Keck I telescope to take advantage of the upcoming Keck All-Precision Adaptive optics (KAPA) system that will offer significantly improved adaptive optics (AO) performance. The design of Liger builds on a legacy of work from partner projects to minimize costs and fabrication and construction timescales. We are heavily leveraging our experience and design work on the first-light instrument IRIS for the Thirty Meter Telescope to construct the Liger instrument for the Keck AO system. We are currently completing the critical design phase for this instrument, and anticipate starting construction in 2021, with completion and delivery slated for 2026. As a precursor to later instruments on extremely large telescopes, Liger is a crucial stepping stone both technologically and scientifically in the next decade.