南天区耀变体的VLBI研究  

A VLBI Study of Blazars in the Southern Hemisphere

作　　者：沈志强[1] 万同山[1] 洪晓瑜[1] 蒋栋荣[1] 梁世光[1] 

机构地区：[1]中国科学院上海天文台

出　　处：《天体物理学报》1997年第4期355-363,共9页

基　　金：国家自然科学基金;国家攀登计划;中国科学院射电天文联合实验室资助;美国哈佛-史密松天体物理中心博士前基

摘　　要：本文报道南天区５ＧＨｚＶＬＢＩ的第二轮观测．第二轮观测是在１９９３年５月期间进行的，共观测了２５个射电源，检测到２４个源，获得了２３个南天区耀变体（Ｂｌａｚａｒ）的ＶＬＢＩ高分辨率的图象，其中１５个是第一次ＶＬＢＩ成图，７个是高能（＞１００ＭｅＶ）γ射电源，１２个源呈现核－喷流结构，其余１１个源是单一的致密核，未发现致密双源．有两个源可能有视超光速现象．In this paper, we describe the second session of the Southern Hemisphere VLBI Survey, which was conducted in May 1993. Twenty five radio sources were observed and 24 sources detected, of which 23 high resolution VLBI images for a sample of blazars in the southern hemisphere were obtained. Of these VLBI imaging has been conducted for 15 sources for the first time and seven are high energy (>100MeV) γ ray sources. Twelve sources appear to be having core jet structures and eleven sources having single compact cores. No compact double sources were found. In particular, apparent superluminal phenomenon was noticed in two sources.

关 键 词：河外射电源 VLBI 耀变体 耀斑 

分 类 号：P157.7[天文地球—天文学] P162.5