Adaptive optics with an infrared pyramid wavefront sensor at Keck
Adaptive optics with an infrared pyramid wavefront sensor at Keck
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Keck 配备红外金字塔波前传感器的自适应光学器件
DOI：
10.1117/1.jatis.6.3.039003
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
V. Chambouleyron
中科院分区：
文献类型：
--
作者：
C. Bond;S. Cetre;S. Lilley;P. Wizinowich;D. Mawet;M. Chun;E. Wetherell;S. Jacobson;C. Lockhart;Eric A. Warmbier;S. Ragland;C. Alvarez;O. Guyon;S. Goebel;J. Delorme;N. Jovanovic;D. Hall;J. Wallace;M. Taheri;C. Plantet;V. Chambouleyron
抽象的。采用红外波阵面传感器的自适应光学（AO）系统可以显著地受益于对冷的或被遮蔽的红色天体物理源的研究。其中一个特别的领域是研究M矮星周围的系外行星和恒星形成区原行星盘内的行星形成。这样的天体在可见光波段是暗淡的，但在红外波段足够明亮，可以用作AO系统的天然引导星星。在红外波长下进行波前传感可以实现对此类科学案例的高分辨率AO校正，并有可能达到系外行星直接成像所需的对比度。为此，一个新的近红外金字塔波前传感器（PyWFS）已被添加到凯克II AO系统，扩展的性能设施AO系统的研究微弱的红色物体。我们提出了凯克II PyWFS，这代表了一些第一，包括第一个安装在分段望远镜上的PyWFS和第一次使用10米级望远镜上的红外PyWFS。我们讨论了红外波前传感提供的科学和技术优势，并介绍了凯克PyWFS的设计和调试。特别是，我们报告的性能的Selex雪崩光电二极管的碲镉汞阵列探测器的PyWFS和突出的新奇，这种波前传感器的性能为微弱的红色物体和对比度的改善。该系统已与NIRC 2红外科学仪器中的涡旋日冕仪一起投入使用，并与NIRSPEC的新纤维注入装置一起投入使用。我们提出了第一个科学验证的系统，以促进研究系外行星周围的M-型恒星。
Abstract. The study of cold or obscured, red astrophysical sources can significantly benefit from adaptive optics (AO) systems employing infrared (IR) wavefront sensors. One particular area is the study of exoplanets around M-dwarf stars and planet formation within protoplanetary disks in star-forming regions. Such objects are faint at visible wavelengths but bright enough in the IR to be used as a natural guide star for the AO system. Doing the wavefront sensing at IR wavelengths enables high-resolution AO correction for such science cases, with the potential to reach the contrasts required for direct imaging of exoplanets. To this end, a new near-infrared pyramid wavefront sensor (PyWFS) has been added to the Keck II AO system, extending the performance of the facility AO system for the study of faint red objects. We present the Keck II PyWFS, which represents a number of firsts, including the first PyWFS installed on a segmented telescope and the first use of an IR PyWFS on a 10-m class telescope. We discuss the scientific and technological advantages offered by IR wavefront sensing and present the design and commissioning of the Keck PyWFS. In particular, we report on the performance of the Selex Avalanche Photodiode for HgCdTe InfraRed Array detector used for the PyWFS and highlight the novelty of this wavefront sensor in terms of the performance for faint red objects and the improvement in contrast. The system has been commissioned for science with the vortex coronagraph in the NIRC2 IR science instrument and is being commissioned alongside a new fiber injection unit for NIRSPEC. We present the first science verification of the system—to facilitate the study of exoplanets around M-type stars.
影响因子：
7.9
作者：
Andrews, Sean M.;Huang, Jane;Ricci, Luca
通讯作者：
Ricci, Luca