Development of the Keck Interferometer with Laser Guide Star Adaptive Optics for Microarcsecond Astrometry

用于微角秒天体测量的激光导星自适应光学凯克干涉仪的研制

• 批准号: 0619965
• 负责人: Peter Wizinowich
• 金额: --
• 依托单位: California Association for Research in Astronomy
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-15 至 2010-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0619965&HistoricalAwards=false
• 关键词: Development; Keck; Interferometer; Laser; Guide

AST-0619965/Wizinowich, HawaiiTwo technical improvements will be made to the Keck Interferometer that will allow unprecedented astrometric observations of the galactic center. The first improvement is to allow fainter science objects to be observed with the Keck Interferometer by implementing a phase referencing mode that uses a bright nearby star to provide the piston correction. (The piston correction accounts for the difference in phase fluctuations that occur along the optical axes of the interferometer elements). The second improvement is to implement an astrometric capability with an accuracy of 30 microarcseconds. The significant new science capabilities of the Keck Interferometer will be available to a broad community of astronomers.

Ast-0619965/Wizinowich，夏威夷将对凯克干涉仪进行两项技术改进，这将允许对银河系中心进行前所未有的天体测量观测。第一个改进是通过实施相位参考模式，利用附近明亮的恒星提供活塞校正，从而允许使用凯克干涉仪观察较暗的科学对象。(活塞校正说明了沿干涉仪元件光轴发生的相位波动的差异)。第二个改进是实现了精度为30微角秒的天体测量能力。凯克干涉仪的重大新科学能力将为广大天文学家所用。