| 活动星系致密核视角大小的统计研究 |
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| 引用本文： | 蒋栋荣.活动星系致密核视角大小的统计研究[J].中国天文和天体物理学报,1995(1). |
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| 作者姓名： | 蒋栋荣 |
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| 作者单位： | 中国科学院上海天文台 |
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| 摘 要： | 本文对ＶＬＢＩ观测得到的河外射电源致密核ｃｏｒｅ的视角大小进行了统计研究，发现对单个源平均上视角大小近似反比于观测频率，与目前的模型相一致。在５ＧＨｚ上，在红移范围０．０４＜ｚ＜２．５内，平均的ｃｏｒｅ视角大小近似为常数，在非均匀喷流模型框架下，一种可能的解释是在河外射电源致密结构中磁场存在着演化。
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| 关 键 词： | 活动星系核，VLBI，致密核，角大小 |
Statistics of Apparent Angular Sizes of VLBI Cores in AGNs |
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| JIANG Dong-rong.Statistics of Apparent Angular Sizes of VLBI Cores in AGNs[J].Chinese Journal of Astronomy and Astrophysics,1995(1). |
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| Authors: | JIANG Dong-rong |
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| Abstract: | A statistical study of the apparent angular sizes of VLBI cores in extragalactic radio sources is presented. The mean angular size of cores is approximately proportional to the inverse of observing frequency, which is consistent with inhomogeneous jet or sphere models. The mean angular size at SGHz is approximately constant in redshifts 0.04
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| Keywords: | AGNs VLBI cores angular sizes |
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