在ELT上用Global-MCAO进行深场测量的前景
Prospects of Deep Field Surveys with Global-MCAO on an ELT
摘要：
为了系统地绘制宇宙及其组成部分的地图，进行了几次旨在调查河外成分的天文观测。需要有极好的细节水平，只有使用空间望远镜或在地面观测站应用自适应光学技术才有可能。通过模拟钱德拉深场南部地区6000个高红移星系的K波段观测，我们已经展示了一个超大型望远镜如何使用Global-MCAO成功地进行测光调查，Global-MCAO是一种基于天然导星的技术，可以进行河外研究，否则不使用激光导星是不可行的。由于分析的结果代表了即将到来的地面望远镜的新仪器的影响科学案例，在这里我们展示了其他观测到的深场的调查如何从这种技术中受益。进一步概述适合所提出的方法的调查，我们显示了初步估计的几何（FoV和高度）和纯粹的AO的角度（丰富性和均匀性的指导星在该地区）计划的巨型望远镜。
英文摘要：
Several astronomical surveys aimed at the investigation of the extragalactic components were carried out in order to map systematically the universe and its constituents. An excellent level of detail is needed, and it is possible only using space telescopes or with the application of adaptive optics (AO) techniques for ground-based observatories. By simulating K-band observations of 6000 high-redshift galaxies in the Chandra Deep Field South region, we have already shown how an extremely large telescope can carry out photometric surveys successfully using the Global-MCAO, a natural guide stars based technique that allows the development of extragalactic research, otherwise impracticable without using laser guide stars. As the outcome of the analysis represents an impact science case for the new instruments on upcoming ground-based telescopes, here we show how the investigation of other observed deep fields could profit from such a technique. Further to an overview of the surveys suitable for the proposed approach, we show preliminary estimations both on geometrical (FoV and height) and purely AO perspectives (richness and homogeneity of guide stars in the area) for planned giant telescope.
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