高灵敏度VLBI和FAST计划

概述了VLBI天体物理的近期发展，主要成就及其受到的灵敏度制约，简要地回顾的目前还处在不太成熟阶段的低频VLBI的探索及近十余牛对提高VLBI灵敏度的硬件和软件两方面的尝试，并在此基础上，着重讲座了我国坟划中的FAST射电望远镜对提高VLBI灵敏度的可能贡献，展望了因为FAST的参与而获得的中低频高灵敏度VLBI的天体物理课及其意义。

High-sensitivity VLBI and the Project FAST

Recent developments of VLBI astrophysics, including essential achievements and constraint posed by the sensitivity, is briefly described at first in this paper. Then a brief review of exploring on lower-frequency VLBI, which is still not so mature at the moment, and trying to improve sensitivity of VLBI in both hard and soft wares in the recede decade is presented. Finally it is emphasized to discuss a potential contribution of planned FAST on improvement of VLBI sensitivity and to bring forward a prospect on high-sensitivity VLBI astrophysics at lower and middle frequencies due to participation of the FAST in the future.