Near Infrared, High Resolution Observations Using Laser Guide Adaptive Optics System

使用激光引导自适应光学系统进行近红外、高分辨率观测

基本信息

批准号：
14002009
负责人：
IYE Masanori
金额：
$ 457.6万
依托单位：
National Astronomical Observatory of Japan
依托单位国家：
日本
项目类别：
Grant-in-Aid for Specially Promoted Research
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14002009/
关键词：
adaptive optics defoemable mirror wavefron sensro sodium laser the most distant galaxy high resolution imaging formation of galaxies reionization of the universe レーザーガイド星可変形鏡高速制御光ファイバー回折限界すばる望遠鏡

项目摘要

This project research aimed at developing newly a "laser guided adaptive optics system" for the 8.2m Subaru Telescope at Mauna Kea, Hawaii Island, operated by National Astronomical Observatory of Japan to promote high resolution, near infrared observations of distant galaxies.The new adaptive optics system developed comprises of a 188-element wavefront sensor, a 188-driving element deformable mirror, and the control system. The system measures a bright guide star in real time to evaluate variation of the wavefront error produced by the turbulent atmosphere and drives the deformable mirror to compensate those errors in real time to achieve diffraction limited imaging capability of the Subaru Telescope. The first light experiment conducted in October 2006 has shown that a stellar image of 0.6 arcsec under the atmospheric turbulence can be squeezed into a 0.06 arcsec image size, 10times smaller than that obtained without using the current system. This helps much in improving the spatial r … More esolution and the sensitivity of observations.Another key system developed is a laser guide star generating system. It comprises of an all solid-state 4W sum-frequency laser developed in collaboration with the RIKEN, a photonic crystal optical fiber to transmit the high power laser to the 50cm diameter laser launching telescope mounted at the top end of the Subaru Telescope. First laser launching experiment carried out in October 2006 also proved successful in generating an artificial laser guide star in the sodium layer at 90km above the ground where the laser beam tuned at 589nm sodium D2 line excites the sodium atoms and causes emission of sodium light bright enough to measure the atmospheric turbulence.In the meantime the current PI found a galaxy at redshift 7.0, which turned out to be the most distant (and hence the earliest in the cosmic history) galaxy. The project team aims to make high resolution imaging observations of these galaxies to unrabel the formation and evolution of galaxies in the early universe. Less

该项目研究旨在为820万个夏威夷岛Mauna Kea的82m Subaru望远镜开发新的“激光指导的自适应光学系统”，该望远镜由日本国家天文天文台运营，以促进高分辨率，几乎是遥远星系的红外观测。新的自适应光学系统开发了一个由188个元素波前传感器，188驱动元件可变形镜和控制系统组成。该系统实时测量一个明亮的导向星，以评估湍流气氛产生的波前误差的变化，并驱动可变形的镜子，以实时补偿这些误差，以实现Subaru望远镜的衍射有限成像能力。 2006年10月进行的第一个光实验表明，在大气湍流下的0.6 Arcsec的恒星图像可以挤压为0.06 ARCSEC图像尺寸，比不使用当前系统获得的10倍小10倍。这有助于提高空间r…更大的效率和观察的敏感性。开发的另一个关键系统是激光导恒星生成系统。它由与Riken合作开发的所有固态4W总和激光，这是一种光子晶体光纤，将高功率激光器传输到直径为50厘米的激光启动望远镜，该望远镜安装在Subaru望远镜的顶端。 2006年10月进行的第一个激光启动实验也成功地在钠层中产生了一个人工激光导向星，在地面上90 km的钠层中，激光束在589nm D2线上调节，使钠原子激发了钠原子并激发了钠原子，并导致钠光的发射量足够光明。最遥远的（因此是宇宙历史上最早的）银河系。该项目团队旨在对这些星系进行高分辨率的成像观察，以解散早期宇宙中星系的形成和演变。较少的