星载单口径天文望远镜的几何光线追踪计算

A. Buffington, E. Mendoza
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引用次数: 0

摘要

在太空中,一台1.5米的望远镜可以实现前所未有的差分天文测量精度,使用的基本上是现代技术。在主焦平面上的Ronchi标尺在图像上移动,光电探测器观察调制的星光,以确定目标恒星和参考恒星之间的角度,半径为5弧分。对于13级目标,经过大约1小时的积分时间,可以达到10微弧秒的精度。这样的望远镜运行了20多年,可以探测到附近恒星周围的行星,并对其他恒星和星系问题做出了重大贡献(Levy et al. 1986, 1987)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Geometrical Ray-Tracing Calculations for a Space-Borne, Single-Aperture Astrometric Telescope Facility
A 1.5 m telescope in space could achieve unprecedented differential astrometric precision, using essentially present-day technology. A Ronchi ruling in the prime focal plane moves over the images, and photoelectric detectors view the modulated starlight to determine angles between the target and reference stars within a 5 arcminute radius. A 10 microarcsecond precision can be achieved, after about an hour s integration time, for 13th magnitude targets. Such a telescope, operating over 20 years, could detect planets around nearby stars, and make major contributions to other stellar and galactic problems (Levy et al. 1986, 1987).
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