| 南天区20个河外射电源的VLBI研究 |
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| 引用本文： | 沈志强,万同山,洪晓瑜,蒋栋荣,梁世光.南天区20个河外射电源的VLBI研究[J].中国天文和天体物理学报,1996(3). |
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| 作者姓名： | 沈志强 万同山 洪晓瑜 蒋栋荣 梁世光 |
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| 作者单位： | 中国科学院上海天文台!上海200030 |
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| 基金项目： | 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 |
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| 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．
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| 关 键 词： | 河外射电源 VLBI 超光速源 |
A VLBI Survey of 20 Extragalactic Radio Sources in the Southern Hemisphere |
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| SHEN Zhi-qiang, WAN Tong-shan, HONG Xiao-yu JIANG Dong-rong, LIANG Shi-guang.A VLBI Survey of 20 Extragalactic Radio Sources in the Southern Hemisphere[J].Chinese Journal of Astronomy and Astrophysics,1996(3). |
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| Authors: | SHEN Zhi-qiang WAN Tong-shan HONG Xiao-yu JIANG Dong-rong LIANG Shi-guang |
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| Abstract: | 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. |
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| Keywords: | extragalactic radio sources VLBI superluminal radio sources |
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