摘要
本文报道南天区5GHzVLBI普查式观测结果.首次观测是在1992年11月期间进行的,共观测了23个河外射电源,获得了20个河外射电源的VLBI高分辨率的射电图象.有15个射电源呈现核喷流结构,1个有双向喷流,3个未分解,末发现有致密观源.在16个核喷流(包括一个双向喷流源)源中有11个呈现弯曲喷流现象.此外还首次发现有3个源中可能有超光速运动现象.
This paper describes a 5GHz VLBI survey in the southern hemisphere. The first observation of 23 extragalactic radio sources was conducted in November 1992. Twenty VLBI images were obtained,of which 15 sources show core-jet structure, one has a two-sided jet, and three sources are unresolved. No compact double source was found. Eleven of the 16 sources with core- jet (including a two-sided jet) show evidence of jet bending. In addition,fou-r sotirces appear to be superluminal, of which three sources are new.
基金
国家自然科学基金
国家攀登计划资助
中国科学院射电天文联合实验室资助
沈志强受美国哈佛-史密松天体物理中心博士前基金
关键词
河外射电源
VLBI
超光速源
南天区
extragalactic radio sources
VLBI
superluminal radio sources