The Adaptive Optics System for the Gemini Infrared Multi-Object Spectrograph: Performance Modeling

IF 3.3 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Publications of the Astronomical Society of the Pacific Pub Date : 2023-10-01 DOI:10.1088/1538-3873/acf61c

Uriel Conod, Kate Jackson, Paolo Turri, Scott Chapman, Olivier Lardière, Masen Lamb, Carlos Correia, Gaetano Sivo, Suresh Sivanandam, Jean-Pierre Véran

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Abstract

Abstract The Gemini Infrared Multi-Object Spectrograph (GIRMOS) will be a near-infrared, multi-object, medium spectral resolution, integral field spectrograph (IFS) for Gemini North Telescope, designed to operate behind the future Gemini North Adaptive Optics system (GNAO). In addition to a first ground layer Adaptive Optics (AO) correction in closed loop carried out by GNAO, each of the four GIRMOS IFSs will independently perform additional multi-object AO correction in open loop, resulting in an improved image quality that is critical to achieve top level science requirements. We present the baseline parameters and simulated performance of GIRMOS obtained by modeling both the GNAO and GIRMOS AO systems. The image quality requirement for GIRMOS is that 57% of the energy of an unresolved point-spread function ensquared within a 0.1 × 0.1 arcsecond at 2.0 μ m. It was established that GIRMOS will be an order 16 × 16 adaptive optics (AO) system after examining the tradeoffs between performance, risks and costs. The ensquared energy requirement will be met in median atmospheric conditions at Maunakea at 30° from zenith.

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双子星红外多目标摄谱仪自适应光学系统:性能建模

双子座红外多目标摄谱仪(GIRMOS)是一种近红外、多目标、中光谱分辨率的积分场摄谱仪(IFS)，用于未来的双子座北方自适应光学系统(GNAO)。除了GNAO在闭环中进行第一层自适应光学(AO)校正外，四个GIRMOS ifs中的每一个都将独立地在开环中进行额外的多目标AO校正，从而提高图像质量，这对于达到顶级科学要求至关重要。通过对GNAO和GIRMOS AO系统进行建模，得到了GIRMOS的基线参数和模拟性能。GIRMOS的图像质量要求是在0.1 × 0.1角秒内，在2.0 μ m处，未解析点扩展函数的能量的57%被平方。通过对性能、风险和成本的权衡，确定了GIRMOS将是一个16 × 16阶自适应光学(AO)系统。在距离天顶30°的莫纳克亚的中等大气条件下，平方能量需求将得到满足。

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来源期刊

Publications of the Astronomical Society of the Pacific 地学天文-天文与天体物理

CiteScore

6.70

自引率

5.70%

发文量

103

审稿时长

4-8 weeks

期刊介绍： The Publications of the Astronomical Society of the Pacific (PASP), the technical journal of the Astronomical Society of the Pacific (ASP), has been published regularly since 1889, and is an integral part of the ASP''s mission to advance the science of astronomy and disseminate astronomical information. The journal provides an outlet for astronomical results of a scientific nature and serves to keep readers in touch with current astronomical research. It contains refereed research and instrumentation articles, invited and contributed reviews, tutorials, and dissertation summaries.