依巴谷后的天体测量卫星项目——空间光干涉卫星

摘要

简述了依巴谷后提出的天体测量卫星项目,如FAME、DIVA、JASMINE、SIM Lite、Gaia、OBSS、JMAPS等.描述了空间光干涉从1980年至今的发展过程,特别给出了用天体测量方法研究天体物理课题之SIM Lite工程的近况:科学目标、仪器的结构、技术上的重大突破点和观测方式等.重点介绍了SIM Lite参考架的构建,包括栅格星和类星体的选择,以及SIM Lite光学参考架与射电参考架ICRF-2之间的联系和联系的精度.比较了SIM与Gaia观测方式的不同点,以及它们在天体物理研究和参考架的建立上互补之处.最后,回顾了中国科学院“八五”重点项目“光学天文中高空间分辨率应用和技术研究”和当前开展有关光干涉工作的—些情况,以及今后开展此课题的若干建议.%The projects of astrometric satellites such as FAME, DIVA, JASMINE, SIM Lite, Gaia, OBSS, JMAPS are briefly described. Their development process of space interferometers from 1980 to now is indicated, especially the current status of SIM project, which is a program on study of astrophysics with astrometric method, is given, such as the science, the structure of instrument, observing mode, the milestone of techniques and so on. The construction of SIM Lite reference frame, including selection of grid stars and quasars such as distribution, magnitude etc. as well as the linkage between SIM reference frame and radio reference frame ICRF-2 is presented. The comparison between the observing mode of Gaia and SIM is made and the complement of Gaia and SIM on astrophysics and reference frame is pointed. Finally, the "eight-five" key project of Chinese academy of sciences on optical interferometry is reviewed and some suggestions on the future work of this project are given.