MOAO first on-sky demonstration with CANARY

MOAO first on-sky demonstration with CANARY
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MOAO 首次与 CANARY 进行空中演示

DOI:
10.1051/0004-6361/201116658
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发表时间:
2011
影响因子:
6.5
通讯作者:
Gendron E
Gendron E
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Gendron E

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一种新的具有挑战性的自适应光学(AO)系统,称为多目标自适应光学(MOAO),已于2010年9月底在西班牙加那利群岛的4.2米威廉赫歇尔望远镜上首次成功演示。目的是证明MOAO在制备未来多目标近红外(IR)积分场单位摄谱仪,以装备用于分析高zgalaxies的形态和动力学的超大望远镜。MethodsCANARY补偿大气湍流与可变形镜驱动开环和控制,通过层析重建由三个广泛分离的off-zgalaxies。轴自然引导星星(NGS)波前传感器,其也处于开环。我们比较了传统的闭环AO,MOAO,和地面层自适应光学(GLAO)的性能,通过分析红外图像和同时波前measurement. ResultsInH波段,Strehl比为0.20测量MOAO,而实现0.25与闭环AO在相当相似的条件下(r 0 ≤ 15厘米,0.5μm)。正如预期,MOAO的性能介于GLAO和闭环AO之间。
ContextA new challenging adaptive optics (AO) system, called multi-object adaptive optics (MOAO), has been successfully demonstrated on-sky for the first time at the 4.2 mWilliam HerschelTelescope, Canary Islands, Spain, at the end of September 2010.AimsThis system, called CANARY, is aimed at demonstrating the feasibility of MOAO in preparation of a future multi-object near infra-red (IR) integral field unit spectrograph to equip extremely large telescopes for analysing the morphology and dynamics of high-zgalaxies.MethodsCANARY compensates for the atmospheric turbulence with a deformable mirror driven in open-loop and controlled through a tomographic reconstruction by three widely separated off-axis natural guide star (NGS) wavefront sensors, which are in open loop too. We compared the performance of conventional closed-loop AO, MOAO, and ground-layer adaptive optics (GLAO) by analysing both IR images and simultaneous wave-front measurements.ResultsInH-band, Strehl ratios of 0.20 are measured with MOAO while achieving 0.25 with closed-loop AO in fairly similar seeing conditions (r0≈ 15 cm at 0.5μm). As expected, MOAO has performed at an intermediate level between GLAO and closed-loop AO.
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