摘要
本文从两个方面评述空间VLBI研究。第一部分是科学目标论证,RADIOASTRON受灵敏度所限但基线比地面长10倍,其基本问题是何类射电源能被观测到,用何方式观测,即检测到,做成图,监测或天体测量。IVS是第二代空间VLBI站,它的科学目标分宇宙学、类星体和星系、恒星、分子云等,我们着重于描述从地面VLBI结果分析而提出有待于解决的问题。第二部分主要介绍技术研究,提到基本原理,灵敏度和分辨率,轨道和成图能力研究等,最后提到空间VLBI的使用。预期今后10年,将会形成从事空间VLBI研究的队伍。
We describe space VLBI research in two aspects. Firstly we present the discussions on scientific objectives. RADIOASTRON has limited sensitivity, while its baseline is a factor of ten longer than baselines on Earth. The problems are to find what classes of sources can be observed and what types of observation should be used. IVS is second generation space VLBI. We present with emphasis on the questions derived from observations on ground VLBI. In the second part of this paper, we present technical research, including concept of space VLBI, sensitivity and angular resolution, and research on orbit and imaging quality. It is expected that a space VLBI contingent will be built up over the next decade.
出处
《天文学进展》
CSCD
北大核心
1992年第3期201-210,共10页
Progress In Astronomy
