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广义相对论框架中的IAU时间尺度和参考系
黄天衣
1 陶金河
2,3
(1. 南京大学天文系 南京 210093)
(2. 中国科学院紫金山天文台 南京 210008)
(3. 中国科学院国家天文台 北京 100012)
摘 要
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简要地回顾和介绍了IAU时间尺度和参考系的历史和进展，其主要内容包括：(1)
牛顿时空观和相对论时空观；(2)
IAU各种时间尺度的历史演变和相互关系；(3)
IAU的天文参考系，有关的最新决议，相对论框架下度规及其规范问题，四维时空中的完全1PN坐标变换。
也介绍了一些有关工作，阐明了与IAU最新决议稍有不同的观点，指出了目前IAU有关决议可能仍存在某种程度上的不完善。
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| 关键词 |
相对论 －
天文参考系 －
时间尺度 |
| 分类号 |
P129 |
The IAU Time Scales and Reference Systems
in the Framework of General
Relativity
Huang
Tianyi 1 Tao Jinhe 2,3
(1. Department of Astronomy, Nanjing University,Nanjing 210093)
(2. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008)
(3. National Astronomical Observatories, Chinese Academy of Sciences, Beijing
100012)
Abstract
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This paper briefly retrospects and introduces the history of the IAU
time scales and reference systems, and especially some new progress.
It mainly includes that: (1) Newtonian and relativistic spacetime
outlook; (2) the historical development of the IAU time scales and
their interrelations; (3) the IAU astronomical reference systems, the
related new resolutions, the metric and its gauge problem in the
relativistic framework, the fully 1PN coordinate transformation in
4-dimensional spacetime. Besides, some of our related results are also
introduced. We present slightly different points of view with the
newest IAU resolutions, and point out that the related IAU
resolutions, in a sense, are probably not perfect. |
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| Key words |
relativity
－
astronomical reference systems －
time scales |
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